Mercurial Hosting > luan
annotate src/luan/impl/LuanParser.java @ 1133:ba4daf107e07
fix security bug
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 17 Jan 2018 20:59:42 -0700 |
parents | 46732cc0ab87 |
children | 9fa8b8389578 |
rev | line source |
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1 package luan.impl; |
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2 |
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3 //import java.io.StringWriter; |
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4 //import java.io.PrintWriter; |
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5 import java.util.Set; |
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6 import java.util.HashSet; |
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7 import java.util.Arrays; |
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8 import java.util.List; |
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9 import java.util.ArrayList; |
676 | 10 import java.util.concurrent.atomic.AtomicInteger; |
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11 import luan.Luan; |
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12 import luan.LuanState; |
503 | 13 import luan.LuanTable; |
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14 import luan.modules.PackageLuan; |
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15 |
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16 |
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17 final class LuanParser { |
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18 |
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19 private interface Sym { |
674 | 20 public Expr exp(); |
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21 } |
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22 |
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23 private int symCounter = 0; |
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24 |
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25 private class LocalSym implements Sym { |
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26 final String name; |
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27 final String javaName; |
671 | 28 boolean isPointer = false; |
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29 |
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30 LocalSym(String name) { |
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31 this.name = name; |
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32 this.javaName = name + "_" + (++symCounter); |
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33 } |
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34 |
674 | 35 Stmts declaration(Expr value) { |
36 Stmts stmt = new Stmts(); | |
671 | 37 if( value==null ) { |
677 | 38 stmt.add( new Object() { |
671 | 39 @Override public String toString() { |
40 if( !isPointer ) | |
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41 return "Object " + javaName + "; "; |
671 | 42 else |
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43 return "final Pointer " + javaName + " = new Pointer(); "; |
671 | 44 } |
45 } ); | |
46 } else { | |
674 | 47 if( value.valType != Val.SINGLE ) throw new RuntimeException(); |
677 | 48 stmt.add( new Object() { |
671 | 49 @Override public String toString() { |
50 if( !isPointer ) | |
51 return "Object " + javaName + " = "; | |
52 else | |
53 return "final Pointer " + javaName + " = new Pointer("; | |
54 } | |
55 } ); | |
677 | 56 stmt.addAll(value); |
57 stmt.add( new Object() { | |
671 | 58 @Override public String toString() { |
59 if( !isPointer ) | |
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60 return "; "; |
671 | 61 else |
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62 return "); "; |
671 | 63 } |
64 } ); | |
65 } | |
66 return stmt; | |
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67 } |
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68 |
674 | 69 @Override public Expr exp() { |
70 Expr exp = new Expr(Val.SINGLE,false); | |
677 | 71 exp.add( new Object() { |
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72 @Override public String toString() { |
671 | 73 if( !isPointer ) |
74 return javaName; | |
75 else | |
76 return javaName + ".o"; | |
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77 } |
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78 } ); |
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79 return exp; |
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80 } |
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81 } |
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82 |
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83 private class UpSym implements Sym { |
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84 final String name; |
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85 final int i; |
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86 final String value; |
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87 |
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88 UpSym(String name,int i,String value) { |
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89 this.name = name; |
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90 this.i = i; |
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91 this.value = value; |
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92 } |
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93 |
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94 String init() { |
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95 return "upValues[" + i + "] = " + value + "; "; |
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96 } |
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97 |
674 | 98 @Override public Expr exp() { |
99 Expr exp = new Expr(Val.SINGLE,false); | |
677 | 100 exp.add( new Object() { |
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101 @Override public String toString() { |
671 | 102 return "upValues[" + i + "].o"; |
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103 } |
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104 } ); |
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105 return exp; |
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106 } |
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107 } |
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108 |
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109 private final class Frame { |
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110 final Frame parent; |
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111 final List<LocalSym> symbols = new ArrayList<LocalSym>(); |
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112 int loops = 0; |
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113 boolean isVarArg = false; |
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114 final List<UpSym> upValueSymbols = new ArrayList<UpSym>(); |
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115 |
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116 Frame() { |
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117 this.parent = null; |
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118 } |
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119 |
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120 Frame(Frame parent) { |
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121 this.parent = parent; |
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122 } |
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123 |
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124 LocalSym addLocalSym(String name) { |
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125 LocalSym sym = new LocalSym(name); |
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126 symbols.add(sym); |
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127 return sym; |
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128 } |
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129 |
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130 UpSym addUpSym(String name,String value) { |
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131 UpSym sym = new UpSym( name, upValueSymbols.size(), value ); |
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132 upValueSymbols.add(sym); |
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133 return sym; |
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134 } |
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135 |
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136 LocalSym getLocalSym(String name) { |
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137 int i = symbols.size(); |
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138 while( --i >= 0 ) { |
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139 LocalSym sym = symbols.get(i); |
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140 if( sym.name.equals(name) ) |
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141 return sym; |
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142 } |
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143 return null; |
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144 } |
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145 |
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146 UpSym getUpSym(String name) { |
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147 for( UpSym upSym : upValueSymbols ) { |
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148 if( upSym.name.equals(name) ) |
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149 return upSym; |
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150 } |
688 | 151 if( parent != null ) { |
152 LocalSym sym = parent.getLocalSym(name); | |
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153 if( sym != null ) { |
671 | 154 sym.isPointer = true; |
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155 return addUpSym(name,sym.javaName); |
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156 } |
688 | 157 UpSym upSym = parent.getUpSym(name); |
158 if( upSym != null ) { | |
159 return addUpSym(name,"parentUpValues["+upSym.i+"]"); | |
160 } | |
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161 } |
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162 return null; |
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163 } |
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164 |
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165 Sym getSym(String name) { |
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166 Sym sym = getLocalSym(name); |
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167 return sym != null ? sym : getUpSym(name); |
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168 } |
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169 |
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170 } |
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171 |
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172 private static class In { |
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173 static final In NOTHING = new In(false); |
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174 |
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175 final boolean template; |
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176 |
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177 private In(boolean template) { |
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178 this.template = template; |
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179 } |
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180 |
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181 In template() { |
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182 return template ? this : new In(true); |
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183 } |
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184 } |
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185 |
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186 private Frame frame; |
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187 private final Parser parser; |
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188 private final Stmts top; |
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189 |
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190 LuanParser(String sourceText,String sourceName) { |
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191 this.frame = new Frame(); |
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192 this.parser = new Parser(sourceText,sourceName); |
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193 this.top = new Stmts(); |
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194 } |
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195 |
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196 void addVar(String name) { |
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197 UpSym upSym = frame.addUpSym( "-ADDED-" ,"new Pointer()"); |
687 | 198 LocalSym sym = frame.addLocalSym( name ); |
199 sym.isPointer = true; | |
200 top.add( "final Pointer " + sym.javaName + " = upValues[" + upSym.i + "]; " ); | |
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201 } |
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202 |
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203 private int symbolsSize() { |
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204 return frame.symbols.size(); |
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205 } |
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206 |
674 | 207 private Stmts addSymbol(String name,Expr value) { |
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208 final LocalSym sym = frame.addLocalSym(name); |
671 | 209 return sym.declaration(value); |
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210 } |
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211 |
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212 private Sym getSym(String name) { |
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213 return frame.getSym(name); |
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214 } |
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215 |
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216 private void popSymbols(int n) { |
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217 List<LocalSym> symbols = frame.symbols; |
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218 while( n-- > 0 ) { |
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219 symbols.remove(symbols.size()-1); |
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220 } |
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221 } |
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222 |
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223 private void incLoops() { |
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224 frame.loops++; |
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225 } |
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226 |
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227 private void decLoops() { |
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228 frame.loops--; |
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229 } |
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230 |
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231 private <T> T required(T t) throws ParseException { |
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232 if( t==null ) |
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233 throw parser.exception(); |
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234 return t; |
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235 } |
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236 |
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237 private <T> T required(T t,String msg) throws ParseException { |
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238 if( t==null ) |
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239 throw parser.exception(msg); |
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240 return t; |
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241 } |
674 | 242 |
678 | 243 private Class newFnClass(Stmts stmt) { |
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244 return toFnClass( stmt, frame.upValueSymbols ); |
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245 } |
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246 |
681 | 247 private Expr newFnExp(Stmts stmt,String name) { |
248 return toFnExp( stmt, frame.upValueSymbols, name ); | |
665 | 249 } |
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250 /* |
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251 Class Expression() throws ParseException { |
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252 Spaces(); |
678 | 253 parser.begin(); |
674 | 254 Expr expr = ExprZ(In.NOTHING); |
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255 if( expr != null && parser.endOfInput() ) { |
677 | 256 top.add( "return " ); |
257 top.addAll( expr ); | |
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258 top.add( "; " ); |
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259 top.hasReturn = true; |
678 | 260 return parser.success(newFnClass(top)); |
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261 } |
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262 return parser.failure(null); |
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263 } |
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264 */ |
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265 Class RequiredModule() throws ParseException { |
678 | 266 GetRequiredModule(); |
267 return newFnClass(top); | |
268 } | |
269 | |
270 String RequiredModuleSource() throws ParseException { | |
271 GetRequiredModule(); | |
272 return toFnString( top, frame.upValueSymbols ); | |
273 } | |
274 | |
275 void GetRequiredModule() throws ParseException { | |
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276 Spaces(); |
678 | 277 parser.begin(); |
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278 frame.isVarArg = true; |
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279 top.add( "final Object[] varArgs = LuanImpl.varArgs(args,0); " ); |
674 | 280 Stmts block = RequiredBlock(); |
677 | 281 top.addAll( block ); |
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282 top.hasReturn = block.hasReturn; |
678 | 283 if( !parser.endOfInput() ) |
284 throw parser.exception(); | |
285 parser.success(); | |
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286 } |
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287 |
674 | 288 private Stmts RequiredBlock() throws ParseException { |
289 Stmts stmts = new Stmts(); | |
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290 int stackStart = symbolsSize(); |
684 | 291 do { |
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292 Spaces(); |
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293 stmts.addNewLines(); |
684 | 294 Stmts stmt = Stmt(); |
295 if( stmt != null ) { | |
296 stmts.addAll(stmt); | |
297 stmts.hasReturn = stmt.hasReturn; | |
298 } | |
299 } while( !stmts.hasReturn && (StmtSep() || TemplateSep(stmts)) ); | |
300 Spaces(); | |
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301 while( StmtSep() ) |
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302 Spaces(); |
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303 stmts.addNewLines(); |
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304 int stackEnd = symbolsSize(); |
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305 popSymbols( stackEnd - stackStart ); |
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306 return stmts; |
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307 } |
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308 |
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309 private boolean StmtSep() throws ParseException { |
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310 return parser.match( ';' ) || EndOfLine(); |
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311 } |
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312 |
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313 private boolean TemplateSep(Stmts stmts) throws ParseException { |
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314 Stmts stmt = TemplateStmt(); |
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315 if( stmt != null ) { |
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316 stmts.addAll(stmt); |
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317 return true; |
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318 } |
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319 return false; |
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320 } |
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321 |
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322 private boolean EndOfLine() { |
684 | 323 if( MatchEndOfLine() ) { |
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324 parser.sb().append('\n'); |
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325 return true; |
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326 } else { |
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327 return false; |
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328 } |
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329 } |
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330 |
684 | 331 private boolean MatchEndOfLine() { |
332 return parser.match( "\r\n" ) || parser.match( '\r' ) || parser.match( '\n' ); | |
333 } | |
334 | |
335 private Stmts Stmt() throws ParseException { | |
674 | 336 Stmts stmt; |
684 | 337 if( (stmt=ReturnStmt()) != null |
338 || (stmt=FunctionStmt()) != null | |
670
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339 || (stmt=LocalStmt()) != null |
661
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340 || (stmt=LocalFunctionStmt()) != null |
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341 || (stmt=BreakStmt()) != null |
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342 || (stmt=ContinueStmt()) != null |
652
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343 || (stmt=ForStmt()) != null |
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344 || (stmt=DoStmt()) != null |
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345 || (stmt=WhileStmt()) != null |
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346 || (stmt=RepeatStmt()) != null |
653
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347 || (stmt=IfStmt()) != null |
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348 || (stmt=SetStmt()) != null |
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349 || (stmt=ExpressionsStmt()) != null |
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350 ) { |
684 | 351 return stmt; |
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352 } |
684 | 353 return null; |
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354 } |
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355 |
674 | 356 private Expr indexExpStr(Expr exp1,Expr exp2) { |
357 Expr exp = new Expr(Val.SINGLE,false); | |
677 | 358 exp.add( "luan.index(" ); |
359 exp.addAll( exp1.single() ); | |
360 exp.add( "," ); | |
361 exp.addAll( exp2.single() ); | |
362 exp.add( ")" ); | |
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363 return exp; |
654 | 364 } |
365 | |
674 | 366 private Expr callExpStr(Expr fn,Expr args) { |
367 Expr exp = new Expr(null,true); | |
677 | 368 exp.add( "Luan.checkFunction(" ); |
369 exp.addAll( fn.single() ); | |
370 exp.add( ").call(luan," ); | |
371 exp.addAll( args.array() ); | |
372 exp.add( ")" ); | |
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373 return exp; |
654 | 374 } |
375 | |
674 | 376 private Stmts TemplateStmt() throws ParseException { |
377 Expr exprs = TemplateExpressions(In.NOTHING); | |
369
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378 if( exprs == null ) |
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379 return null; |
674 | 380 Stmts stmt = new Stmts(); |
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381 stmt.add( "Luan.checkFunction(luan.index(PackageLuan.require(luan,\"luan:Io.luan\"),\"template_write\")).call(luan," ); |
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382 stmt.addAll( exprs.array() ); |
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383 stmt.add( "); " ); |
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384 return stmt; |
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385 } |
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386 |
674 | 387 private Expr TemplateExpressions(In in) throws ParseException { |
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388 if( in.template ) |
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389 return null; |
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390 int start = parser.begin(); |
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391 if( !parser.match( "%>" ) ) |
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392 return parser.failure(null); |
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393 EndOfLine(); |
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394 In inTemplate = in.template(); |
674 | 395 List<Expr> builder = new ArrayList<Expr>(); |
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396 while(true) { |
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397 if( parser.match( "<%=" ) ) { |
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398 Spaces(); |
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399 Expr exp = new Expr(Val.SINGLE,false); |
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400 exp.addAll( RequiredExpr(inTemplate).single() ); |
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401 builder.add(exp); |
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402 RequiredMatch( "%>" ); |
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403 } else if( parser.match( "<%" ) ) { |
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404 Spaces(); |
654 | 405 return parser.success(expString(builder)); |
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406 } else { |
714 | 407 Expr exp = new Expr(Val.SINGLE,false); |
104
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408 int i = parser.currentIndex(); |
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409 do { |
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410 if( parser.match( "%>" ) ) |
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411 throw parser.exception("'%>' unexpected"); |
714 | 412 if( !(EndOfLine() || parser.anyChar()) ) |
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413 throw parser.exception("Unclosed template expression"); |
104
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414 } while( !parser.test( "<%" ) ); |
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415 String match = parser.textFrom(i); |
714 | 416 String rtns = parser.sb().toString(); |
417 parser.sb().setLength(0); | |
418 exp.addAll( constExpStr(match) ); | |
419 if( rtns.length() > 0 ) | |
420 exp.add(rtns); | |
421 builder.add(exp); | |
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422 } |
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423 } |
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424 } |
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425 |
674 | 426 private Stmts ReturnStmt() throws ParseException { |
645 | 427 parser.begin(); |
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428 if( !Keyword("return") ) |
104
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429 return parser.failure(null); |
674 | 430 Expr exprs = ExpStringList(In.NOTHING); |
431 Stmts stmt = new Stmts(); | |
677 | 432 stmt.add( "return " ); |
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433 if( exprs != null ) |
677 | 434 stmt.addAll( exprs ); |
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435 else |
677 | 436 stmt.add( "LuanFunction.NOTHING" ); |
679
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437 stmt.add( "; " ); |
684 | 438 stmt.hasReturn = true; |
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439 return parser.success( stmt ); |
104
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440 } |
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441 |
674 | 442 private Stmts FunctionStmt() throws ParseException { |
104
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443 parser.begin(); |
679
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444 if( !Keyword("function") ) |
104
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445 return parser.failure(null); |
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446 |
645 | 447 parser.currentIndex(); |
681 | 448 String name = RequiredName(); |
449 Var var = nameVar(name); | |
104
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450 while( parser.match( '.' ) ) { |
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451 Spaces(); |
681 | 452 // Expr exp = NameExpr(); |
453 name = Name(); | |
454 if( name==null ) | |
636 | 455 return parser.failure(null); |
681 | 456 var = indexVar( var.exp(), constExpStr(name) ); |
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457 } |
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458 |
681 | 459 Expr fnDef = RequiredFunction(name); |
665 | 460 return parser.success( var.set(fnDef) ); |
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461 } |
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462 |
674 | 463 private Stmts LocalFunctionStmt() throws ParseException { |
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464 parser.begin(); |
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465 if( !(Keyword("local") && Keyword("function")) ) |
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466 return parser.failure(null); |
674 | 467 Stmts stmt = new Stmts(); |
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468 String name = RequiredName(); |
677 | 469 stmt.addAll( addSymbol(name,null) ); |
681 | 470 Expr fnDef = RequiredFunction(name); |
677 | 471 stmt.addAll( nameVar(name).set(fnDef) ); |
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472 return parser.success( stmt ); |
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473 } |
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474 |
674 | 475 private Stmts BreakStmt() throws ParseException { |
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476 parser.begin(); |
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477 if( !Keyword("break") ) |
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478 return parser.failure(null); |
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479 if( frame.loops <= 0 ) |
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480 throw parser.exception("'break' outside of loop"); |
674 | 481 Stmts stmt = new Stmts(); |
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482 stmt.add( "break; " ); |
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483 return parser.success( stmt ); |
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484 } |
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485 |
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486 private Stmts ContinueStmt() throws ParseException { |
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487 parser.begin(); |
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488 if( !Keyword("continue") ) |
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489 return parser.failure(null); |
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490 if( frame.loops <= 0 ) |
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491 throw parser.exception("'continue' outside of loop"); |
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492 Stmts stmt = new Stmts(); |
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493 stmt.add( "continue; " ); |
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494 return parser.success( stmt ); |
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495 } |
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496 |
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497 int forCounter = 0; |
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498 |
674 | 499 private Stmts ForStmt() throws ParseException { |
645 | 500 parser.begin(); |
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501 int stackStart = symbolsSize(); |
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502 if( !Keyword("for") ) |
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503 return parser.failure(null); |
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504 List<String> names = RequiredNameList(); |
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505 if( !Keyword("in") ) |
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506 return parser.failure(null); |
674 | 507 Expr expr = RequiredExpr(In.NOTHING).single(); |
681 | 508 RequiredKeyword("do"); |
652
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509 |
654 | 510 String fnVar = "fn"+ ++forCounter; |
674 | 511 Expr fnExp = new Expr(null,false); |
677 | 512 fnExp.add( fnVar + ".call(luan)" ); |
674 | 513 Stmts stmt = new Stmts(); |
677 | 514 stmt.add( "" |
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515 +"LuanFunction "+fnVar+" = Luan.checkFunction(" |
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516 ); |
677 | 517 stmt.addAll( expr ); |
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518 stmt.add( "); " ); |
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519 stmt.add( "while(true) { " ); |
677 | 520 stmt.addAll( makeLocalSetStmt(names,fnExp) ); |
521 stmt.add( "if( " ); | |
522 stmt.addAll( nameVar(names.get(0)).exp() ); | |
679
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523 stmt.add( "==null ) break; " ); |
674 | 524 Stmts loop = RequiredLoopBlock(); |
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525 RequiredEnd("end_for"); |
677 | 526 stmt.addAll( loop ); |
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527 stmt.add( "} " ); |
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528 popSymbols( symbolsSize() - stackStart ); |
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529 return parser.success(stmt); |
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530 } |
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531 |
674 | 532 private Stmts DoStmt() throws ParseException { |
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533 parser.begin(); |
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534 if( !Keyword("do") ) |
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535 return parser.failure(null); |
674 | 536 Stmts stmt = RequiredBlock(); |
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537 RequiredEnd("end_do"); |
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538 return parser.success(stmt); |
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539 } |
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540 |
674 | 541 private Stmts LocalStmt() throws ParseException { |
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542 parser.begin(); |
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543 if( !Keyword("local") ) |
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544 return parser.failure(null); |
679
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545 List<String> names = NameList(); |
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546 if( names==null ) { |
679
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547 if( Keyword("function") ) |
670
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548 return parser.failure(null); // handled later |
356
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549 throw parser.exception("Invalid local statement"); |
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550 } |
674 | 551 Stmts stmt = new Stmts(); |
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552 if( parser.match( '=' ) ) { |
679
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553 Spaces(); |
674 | 554 Expr values = ExpStringList(In.NOTHING); |
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555 if( values==null ) |
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556 throw parser.exception("Expressions expected"); |
677 | 557 stmt.addAll( makeLocalSetStmt(names,values) ); |
671 | 558 } else { |
674 | 559 Expr value = new Expr(Val.SINGLE,false); |
677 | 560 value.add( "null" ); |
670
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561 for( String name : names ) { |
677 | 562 stmt.addAll( addSymbol(name,value) ); |
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563 } |
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564 } |
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565 return parser.success(stmt); |
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566 } |
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567 |
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568 private List<String> RequiredNameList() throws ParseException { |
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569 parser.begin(); |
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570 List<String> names = NameList(); |
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571 if( names==null ) |
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572 throw parser.exception("Name expected"); |
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573 return parser.success(names); |
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574 } |
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575 |
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576 private List<String> NameList() throws ParseException { |
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577 String name = Name(); |
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578 if( name==null ) |
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579 return null; |
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580 List<String> names = new ArrayList<String>(); |
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581 names.add(name); |
679
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582 while( (name=anotherName()) != null ) { |
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583 names.add(name); |
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584 } |
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585 return names; |
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586 } |
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587 |
679
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588 private String anotherName() throws ParseException { |
139
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589 parser.begin(); |
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590 if( !parser.match( ',' ) ) |
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591 return parser.failure(null); |
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592 Spaces(); |
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593 String name = Name(); |
139
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594 if( name==null ) |
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595 return parser.failure(null); |
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596 return parser.success(name); |
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597 } |
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598 |
674 | 599 private Stmts WhileStmt() throws ParseException { |
645 | 600 parser.begin(); |
679
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601 if( !Keyword("while") ) |
104
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602 return parser.failure(null); |
674 | 603 Expr cnd = RequiredExpr(In.NOTHING).single(); |
681 | 604 RequiredKeyword("do"); |
674 | 605 Stmts loop = RequiredLoopBlock(); |
1091
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606 RequiredEnd("end_while"); |
674 | 607 Stmts stmt = new Stmts(); |
677 | 608 stmt.add( "while( Luan.checkBoolean(" ); |
609 stmt.addAll( cnd ); | |
679
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610 stmt.add( ") ) { " ); |
677 | 611 stmt.addAll( loop ); |
679
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612 stmt.add( "} " ); |
666
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613 return parser.success( stmt ); |
104
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614 } |
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615 |
674 | 616 private Stmts RepeatStmt() throws ParseException { |
645 | 617 parser.begin(); |
679
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618 if( !Keyword("repeat") ) |
104
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619 return parser.failure(null); |
674 | 620 Stmts loop =RequiredLoopBlock(); |
681 | 621 RequiredKeyword("until"); |
674 | 622 Expr cnd = RequiredExpr(In.NOTHING).single(); |
623 Stmts stmt = new Stmts(); | |
679
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624 stmt.add( "do { " ); |
677 | 625 stmt.addAll( loop ); |
626 stmt.add( "} while( !Luan.checkBoolean(" ); | |
627 stmt.addAll( cnd ); | |
679
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628 stmt.add( ") ); " ); |
666
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629 return parser.success( stmt ); |
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630 } |
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631 |
674 | 632 private Stmts RequiredLoopBlock() throws ParseException { |
104
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633 incLoops(); |
674 | 634 Stmts stmt = RequiredBlock(); |
104
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635 decLoops(); |
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636 return stmt; |
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637 } |
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638 |
674 | 639 private Stmts IfStmt() throws ParseException { |
104
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640 parser.begin(); |
679
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641 if( !Keyword("if") ) |
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642 return parser.failure(null); |
674 | 643 Stmts stmt = new Stmts(); |
644 Expr cnd; | |
645 Stmts block; | |
684 | 646 boolean hasReturn = true; |
674 | 647 cnd = RequiredExpr(In.NOTHING).single(); |
681 | 648 RequiredKeyword("then"); |
653
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649 block = RequiredBlock(); |
677 | 650 stmt.add( "if( Luan.checkBoolean(" ); |
651 stmt.addAll( cnd ); | |
679
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652 stmt.add( ") ) { " ); |
677 | 653 stmt.addAll( block ); |
684 | 654 if( !block.hasReturn ) |
655 hasReturn = false; | |
679
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656 while( Keyword("elseif") ) { |
674 | 657 cnd = RequiredExpr(In.NOTHING).single(); |
681 | 658 RequiredKeyword("then"); |
653
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659 block = RequiredBlock(); |
677 | 660 stmt.add( "} else if( Luan.checkBoolean(" ); |
661 stmt.addAll( cnd ); | |
679
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662 stmt.add( ") ) { " ); |
677 | 663 stmt.addAll( block ); |
684 | 664 if( !block.hasReturn ) |
665 hasReturn = false; | |
104
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666 } |
679
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667 if( Keyword("else") ) { |
653
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668 block = RequiredBlock(); |
679
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669 stmt.add( "} else { " ); |
677 | 670 stmt.addAll( block ); |
684 | 671 if( !block.hasReturn ) |
672 hasReturn = false; | |
673 } else { | |
674 hasReturn = false; | |
653
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675 } |
1091
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676 RequiredEnd("end_if"); |
679
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677 stmt.add( "} " ); |
684 | 678 stmt.hasReturn = hasReturn; |
666
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679 return parser.success( stmt ); |
20
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680 } |
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681 |
674 | 682 private Stmts SetStmt() throws ParseException { |
104
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683 parser.begin(); |
660 | 684 List<Var> vars = new ArrayList<Var>(); |
685 Var v = SettableVar(); | |
686 if( v == null ) | |
104
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687 return parser.failure(null); |
660 | 688 vars.add(v); |
104
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689 while( parser.match( ',' ) ) { |
679
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690 Spaces(); |
660 | 691 v = SettableVar(); |
692 if( v == null ) | |
104
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693 return parser.failure(null); |
660 | 694 vars.add(v); |
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695 } |
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696 if( !parser.match( '=' ) ) |
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697 return parser.failure(null); |
679
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698 Spaces(); |
674 | 699 Expr values = ExpStringList(In.NOTHING); |
104
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700 if( values==null ) |
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701 // throw parser.exception("Expressions expected"); |
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702 return parser.failure(null); |
670
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703 return parser.success( makeSetStmt(vars,values) ); |
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704 } |
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705 |
674 | 706 private Stmts makeSetStmt(List<Var> vars,Expr values) throws ParseException { |
660 | 707 int n = vars.size(); |
708 if( n == 1 ) | |
670
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709 return vars.get(0).set(values); |
674 | 710 Stmts stmt = new Stmts(); |
711 String varName = values.valType==Val.ARRAY ? "a" : "t"; | |
677 | 712 stmt.add( varName + " = " ); |
713 stmt.addAll( values ); | |
679
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714 stmt.add( "; " ); |
674 | 715 Expr t = new Expr(values.valType,false); |
677 | 716 t.add( varName ); |
674 | 717 t = t.single(); |
677 | 718 stmt.addAll( vars.get(0).set(t) ); |
660 | 719 for( int i=1; i<n; i++ ) { |
677 | 720 t.clear(); |
721 t.add( "LuanImpl.pick(" + varName + ","+i+")" ); | |
722 stmt.addAll( vars.get(i).set(t) ); | |
660 | 723 } |
670
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|
724 return stmt; |
652
067d9470184d
compile SetStmt and ForStmt
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725 } |
671 | 726 |
674 | 727 private Stmts makeLocalSetStmt(List<String> names,Expr values) throws ParseException { |
671 | 728 int n = names.size(); |
729 if( n == 1 ) | |
674 | 730 return addSymbol(names.get(0),values.single()); |
731 Stmts stmt = new Stmts(); | |
732 String varName = values.valType==Val.ARRAY ? "a" : "t"; | |
677 | 733 stmt.add( varName + " = " ); |
734 stmt.addAll( values ); | |
679
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735 stmt.add( "; " ); |
674 | 736 Expr t = new Expr(values.valType,false); |
677 | 737 t.add( varName ); |
674 | 738 t = t.single(); |
677 | 739 stmt.addAll( addSymbol(names.get(0),t) ); |
671 | 740 for( int i=1; i<n; i++ ) { |
677 | 741 t.clear(); |
742 t.add( "LuanImpl.pick(" + varName + ","+i+")" ); | |
743 stmt.addAll( addSymbol(names.get(i),t) ); | |
652
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744 } |
671 | 745 return stmt; |
104
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746 } |
671 | 747 |
674 | 748 private Stmts ExpressionsStmt() throws ParseException { |
104
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749 parser.begin(); |
674 | 750 Expr exp = ExprZ(In.NOTHING); |
651
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751 if( exp != null && exp.isStmt ) { |
674 | 752 Stmts stmt = new Stmts(); |
753 if( exp.valType==Val.SINGLE ) { | |
677 | 754 stmt.add( "LuanImpl.nop(" ); |
755 stmt.addAll( exp ); | |
756 stmt.add( ")" ); | |
666
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parents:
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diff
changeset
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757 } else { |
677 | 758 stmt.addAll( exp ); |
666
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diff
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|
759 } |
679
43522473599d
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760 stmt.add( "; " ); |
666
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diff
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|
761 return parser.success( stmt ); |
651
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diff
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|
762 } |
159
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763 return parser.failure(null); |
104
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764 } |
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765 |
660 | 766 private Var SettableVar() throws ParseException { |
104
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767 int start = parser.begin(); |
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|
768 Var var = VarZ(In.NOTHING); |
660 | 769 if( var==null || !var.isSettable() ) |
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770 return parser.failure(null); |
660 | 771 return parser.success( var ); |
104
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772 } |
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773 |
674 | 774 private Expr RequiredExpr(In in) throws ParseException { |
129
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775 parser.begin(); |
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776 return parser.success(required(ExprZ(in),"Bad expression")); |
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777 } |
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778 |
674 | 779 private Expr ExprZ(In in) throws ParseException { |
449 | 780 return OrExpr(in); |
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781 } |
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782 |
674 | 783 private Expr OrExpr(In in) throws ParseException { |
645 | 784 parser.begin(); |
674 | 785 Expr exp = AndExpr(in); |
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786 if( exp==null ) |
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787 return parser.failure(null); |
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788 while( Keyword("or") ) { |
674 | 789 exp = exp.single(); |
773 | 790 Expr exp2 = required(AndExpr(in)).single(); |
674 | 791 Expr newExp = new Expr(Val.SINGLE,true); |
677 | 792 newExp.add( "(LuanImpl.cnd(t = " ); |
793 newExp.addAll( exp ); | |
794 newExp.add( ") ? t : (" ); | |
795 newExp.addAll( exp2 ); | |
796 newExp.add( "))" ); | |
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797 exp = newExp; |
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798 } |
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799 return parser.success(exp); |
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800 } |
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801 |
674 | 802 private Expr AndExpr(In in) throws ParseException { |
645 | 803 parser.begin(); |
674 | 804 Expr exp = RelExpr(in); |
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805 if( exp==null ) |
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806 return parser.failure(null); |
679
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807 while( Keyword("and") ) { |
674 | 808 exp = exp.single(); |
809 Expr exp2 = required(RelExpr(in)).single(); | |
810 Expr newExp = new Expr(Val.SINGLE,true); | |
677 | 811 newExp.add( "(LuanImpl.cnd(t = " ); |
812 newExp.addAll( exp ); | |
813 newExp.add( ") ? (" ); | |
814 newExp.addAll( exp2 ); | |
815 newExp.add( ") : t)" ); | |
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816 exp = newExp; |
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817 } |
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818 return parser.success(exp); |
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819 } |
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820 |
674 | 821 private Expr RelExpr(In in) throws ParseException { |
645 | 822 parser.begin(); |
674 | 823 Expr exp = ConcatExpr(in); |
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824 if( exp==null ) |
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825 return parser.failure(null); |
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826 while(true) { |
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827 if( parser.match("==") ) { |
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828 Spaces(); |
674 | 829 exp = exp.single(); |
830 Expr exp2 = required(ConcatExpr(in)).single(); | |
831 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 832 newExp.add( "LuanImpl.eq(luan," ); |
833 newExp.addAll( exp ); | |
834 newExp.add( "," ); | |
835 newExp.addAll( exp2 ); | |
836 newExp.add( ")" ); | |
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837 exp = newExp; |
104
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838 } else if( parser.match("~=") ) { |
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839 Spaces(); |
674 | 840 exp = exp.single(); |
841 Expr exp2 = required(ConcatExpr(in)).single(); | |
842 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 843 newExp.add( "!LuanImpl.eq(luan," ); |
844 newExp.addAll( exp ); | |
845 newExp.add( "," ); | |
846 newExp.addAll( exp2 ); | |
847 newExp.add( ")" ); | |
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848 exp = newExp; |
104
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849 } else if( parser.match("<=") ) { |
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850 Spaces(); |
674 | 851 exp = exp.single(); |
852 Expr exp2 = required(ConcatExpr(in)).single(); | |
853 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 854 newExp.add( "LuanImpl.le(luan," ); |
855 newExp.addAll( exp ); | |
856 newExp.add( "," ); | |
857 newExp.addAll( exp2 ); | |
858 newExp.add( ")" ); | |
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859 exp = newExp; |
104
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860 } else if( parser.match(">=") ) { |
679
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861 Spaces(); |
674 | 862 exp = exp.single(); |
863 Expr exp2 = required(ConcatExpr(in)).single(); | |
864 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 865 newExp.add( "LuanImpl.le(luan," ); |
866 newExp.addAll( exp2 ); | |
867 newExp.add( "," ); | |
868 newExp.addAll( exp ); | |
869 newExp.add( ")" ); | |
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870 exp = newExp; |
104
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871 } else if( parser.match("<") ) { |
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872 Spaces(); |
674 | 873 exp = exp.single(); |
874 Expr exp2 = required(ConcatExpr(in)).single(); | |
875 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 876 newExp.add( "LuanImpl.lt(luan," ); |
877 newExp.addAll( exp ); | |
878 newExp.add( "," ); | |
879 newExp.addAll( exp2 ); | |
880 newExp.add( ")" ); | |
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881 exp = newExp; |
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882 } else if( parser.match(">") ) { |
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883 Spaces(); |
674 | 884 exp = exp.single(); |
885 Expr exp2 = required(ConcatExpr(in)).single(); | |
886 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 887 newExp.add( "LuanImpl.lt(luan," ); |
888 newExp.addAll( exp2 ); | |
889 newExp.add( "," ); | |
890 newExp.addAll( exp ); | |
891 newExp.add( ")" ); | |
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892 exp = newExp; |
104
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893 } else |
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894 break; |
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895 } |
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896 return parser.success(exp); |
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897 } |
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898 |
674 | 899 private Expr ConcatExpr(In in) throws ParseException { |
645 | 900 parser.begin(); |
674 | 901 Expr exp = SumExpr(in); |
104
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902 if( exp==null ) |
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903 return parser.failure(null); |
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904 if( parser.match("..") ) { |
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905 Spaces(); |
674 | 906 exp = exp.single(); |
907 Expr exp2 = required(ConcatExpr(in)).single(); | |
908 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 909 newExp.add( "LuanImpl.concat(luan," ); |
910 newExp.addAll( exp ); | |
911 newExp.add( "," ); | |
912 newExp.addAll( exp2 ); | |
913 newExp.add( ")" ); | |
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914 exp = newExp; |
104
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915 } |
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916 return parser.success(exp); |
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917 } |
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918 |
674 | 919 private Expr SumExpr(In in) throws ParseException { |
645 | 920 parser.begin(); |
674 | 921 Expr exp = TermExpr(in); |
104
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922 if( exp==null ) |
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923 return parser.failure(null); |
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924 while(true) { |
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925 if( parser.match('+') ) { |
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926 Spaces(); |
674 | 927 exp = exp.single(); |
928 Expr exp2 = required(TermExpr(in)).single(); | |
929 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 930 newExp.add( "LuanImpl.add(luan," ); |
931 newExp.addAll( exp ); | |
932 newExp.add( "," ); | |
933 newExp.addAll( exp2 ); | |
934 newExp.add( ")" ); | |
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935 exp = newExp; |
104
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936 } else if( Minus() ) { |
679
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937 Spaces(); |
674 | 938 exp = exp.single(); |
939 Expr exp2 = required(TermExpr(in)).single(); | |
940 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 941 newExp.add( "LuanImpl.sub(luan," ); |
942 newExp.addAll( exp ); | |
943 newExp.add( "," ); | |
944 newExp.addAll( exp2 ); | |
945 newExp.add( ")" ); | |
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946 exp = newExp; |
104
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947 } else |
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948 break; |
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949 } |
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950 return parser.success(exp); |
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951 } |
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952 |
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953 private boolean Minus() { |
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954 parser.begin(); |
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955 return parser.match('-') && !parser.match('-') ? parser.success() : parser.failure(); |
12
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956 } |
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957 |
674 | 958 private Expr TermExpr(In in) throws ParseException { |
645 | 959 parser.begin(); |
674 | 960 Expr exp = UnaryExpr(in); |
650
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961 if( exp==null ) |
104
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962 return parser.failure(null); |
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963 while(true) { |
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964 if( parser.match('*') ) { |
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965 Spaces(); |
674 | 966 exp = exp.single(); |
967 Expr exp2 = required(UnaryExpr(in)).single(); | |
968 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 969 newExp.add( "LuanImpl.mul(luan," ); |
970 newExp.addAll( exp ); | |
971 newExp.add( "," ); | |
972 newExp.addAll( exp2 ); | |
973 newExp.add( ")" ); | |
666
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974 exp = newExp; |
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975 } else if( parser.match('/') ) { |
679
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976 Spaces(); |
674 | 977 exp = exp.single(); |
978 Expr exp2 = required(UnaryExpr(in)).single(); | |
979 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 980 newExp.add( "LuanImpl.div(luan," ); |
981 newExp.addAll( exp ); | |
982 newExp.add( "," ); | |
983 newExp.addAll( exp2 ); | |
984 newExp.add( ")" ); | |
666
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985 exp = newExp; |
107
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986 } else if( Mod() ) { |
679
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987 Spaces(); |
674 | 988 exp = exp.single(); |
989 Expr exp2 = required(UnaryExpr(in)).single(); | |
990 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 991 newExp.add( "LuanImpl.mod(luan," ); |
992 newExp.addAll( exp ); | |
993 newExp.add( "," ); | |
994 newExp.addAll( exp2 ); | |
995 newExp.add( ")" ); | |
666
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996 exp = newExp; |
104
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997 } else |
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998 break; |
17
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999 } |
104
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1000 return parser.success(exp); |
17
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1001 } |
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1002 |
107
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1003 private boolean Mod() { |
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1004 parser.begin(); |
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1005 return parser.match('%') && !parser.match('>') ? parser.success() : parser.failure(); |
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1006 } |
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1007 |
674 | 1008 private Expr UnaryExpr(In in) throws ParseException { |
645 | 1009 parser.begin(); |
104
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1010 if( parser.match('#') ) { |
679
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1011 Spaces(); |
674 | 1012 Expr exp = required(UnaryExpr(in)).single(); |
1013 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 1014 newExp.add( "LuanImpl.len(luan," ); |
1015 newExp.addAll( exp ); | |
1016 newExp.add( ")" ); | |
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1017 return parser.success(newExp); |
104
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1018 } |
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1019 if( Minus() ) { |
679
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1020 Spaces(); |
674 | 1021 Expr exp = required(UnaryExpr(in)).single(); |
1022 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 1023 newExp.add( "LuanImpl.unm(luan," ); |
1024 newExp.addAll( exp ); | |
1025 newExp.add( ")" ); | |
666
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1026 return parser.success(newExp); |
104
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1027 } |
679
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1028 if( Keyword("not") ) { |
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1029 Spaces(); |
674 | 1030 Expr exp = required(UnaryExpr(in)).single(); |
1031 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 1032 newExp.add( "!Luan.checkBoolean(" ); |
1033 newExp.addAll( exp ); | |
1034 newExp.add( ")" ); | |
666
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1035 return parser.success(newExp); |
104
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1036 } |
674 | 1037 Expr exp = PowExpr(in); |
104
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1038 if( exp==null ) |
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1039 return parser.failure(null); |
650
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1040 return parser.success(exp); |
104
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1041 } |
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1042 |
674 | 1043 private Expr PowExpr(In in) throws ParseException { |
645 | 1044 parser.begin(); |
674 | 1045 Expr exp1 = SingleExpr(in); |
657 | 1046 if( exp1==null ) |
104
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1047 return parser.failure(null); |
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1048 if( parser.match('^') ) { |
679
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1049 Spaces(); |
674 | 1050 Expr exp2 = required(PowExpr(in)); |
1051 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 1052 newExp.add( "LuanImpl.pow(luan," ); |
1053 newExp.addAll( exp1.single() ); | |
1054 newExp.add( "," ); | |
1055 newExp.addAll( exp2.single() ); | |
1056 newExp.add( ")" ); | |
666
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1057 exp1 = newExp; |
104
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1058 } |
650
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1059 return parser.success(exp1); |
14
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1060 } |
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1061 |
674 | 1062 private Expr SingleExpr(In in) throws ParseException { |
104
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1063 parser.begin(); |
681 | 1064 Expr exp = FunctionExpr(); |
670
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1065 if( exp != null ) |
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1066 return parser.success(exp); |
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1067 exp = VarExp(in); |
104
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1068 if( exp != null ) |
670
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1069 return parser.success(exp); |
679
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1070 exp = VarArgs(); |
670
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1071 if( exp != null ) |
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1072 return parser.success(exp); |
104
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1073 return parser.failure(null); |
14
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1074 } |
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1075 |
681 | 1076 private Expr FunctionExpr() throws ParseException { |
679
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1077 if( !Keyword("function") ) |
104
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1078 return null; |
681 | 1079 return RequiredFunction(null); |
20
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1080 } |
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1081 |
681 | 1082 private Expr RequiredFunction(String name) throws ParseException { |
678 | 1083 parser.begin(); |
104
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1084 RequiredMatch('('); |
679
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1085 Spaces(); |
104
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1086 frame = new Frame(frame); |
674 | 1087 Stmts stmt = new Stmts(); |
679
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1088 List<String> names = NameList(); |
104
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1089 if( names != null ) { |
1089
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1090 /* |
674 | 1091 Expr args = new Expr(Val.ARRAY,false); |
677 | 1092 args.add( "args" ); |
1093 stmt.addAll( makeLocalSetStmt(names,args) ); | |
1089
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1094 */ |
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1095 int n = names.size(); |
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1096 Expr t = new Expr(Val.SINGLE,false); |
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1097 for( int i=0; i<n; i++ ) { |
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1098 t.clear(); |
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1099 t.add( "LuanImpl.pick(args,"+i+")" ); |
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1100 stmt.addAll( addSymbol(names.get(i),t) ); |
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1101 } |
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1102 |
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1103 if( parser.match(',') ) { |
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1104 Spaces(); |
104
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1105 if( !parser.match("...") ) |
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1106 throw parser.exception(); |
679
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1107 Spaces(); |
104
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1108 frame.isVarArg = true; |
679
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1109 stmt.add( "final Object[] varArgs = LuanImpl.varArgs(args," + names.size() + "); " ); |
1089
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1110 } else { |
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1111 stmt.add( "LuanImpl.noMore(args,"+n+"); " ); |
104
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1112 } |
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1113 } else if( parser.match("...") ) { |
679
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1114 Spaces(); |
104
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1115 frame.isVarArg = true; |
679
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1116 stmt.add( "final Object[] varArgs = LuanImpl.varArgs(args,0); " ); |
1089
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1117 } else { |
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1118 stmt.add( "LuanImpl.noMore(args,0); " ); |
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1119 } |
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1120 RequiredMatch(')'); |
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1121 Spaces(); |
674 | 1122 Stmts block = RequiredBlock(); |
677 | 1123 stmt.addAll( block ); |
670
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1124 stmt.hasReturn = block.hasReturn; |
681 | 1125 Expr fnDef = newFnExp(stmt,name); |
1091
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1126 RequiredEnd("end_function"); |
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1127 frame = frame.parent; |
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1128 return parser.success(fnDef); |
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1129 } |
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1130 |
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1131 private Expr VarArgs() throws ParseException { |
645 | 1132 parser.begin(); |
104
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1133 if( !frame.isVarArg || !parser.match("...") ) |
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1134 return parser.failure(null); |
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1135 Spaces(); |
674 | 1136 Expr exp = new Expr(Val.ARRAY,false); |
677 | 1137 exp.add("varArgs"); |
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1138 return parser.success(exp); |
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1139 } |
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1140 |
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1141 private Expr TableExpr() throws ParseException { |
645 | 1142 parser.begin(); |
104
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1143 if( !parser.match('{') ) |
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1144 return parser.failure(null); |
682 | 1145 Expr tblExp = new Expr(Val.SINGLE,false); |
1146 tblExp.add( "LuanImpl.table(" ); | |
1147 Expr lastExp = tblExp; | |
1148 List<Expr> builder = new ArrayList<Expr>(); | |
1149 /* | |
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1150 Spaces(); |
655 | 1151 Field(builder); |
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1152 while( FieldSep() ) { |
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1153 Spaces(); |
655 | 1154 Field(builder); |
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1155 } |
682 | 1156 */ |
1157 do { | |
1158 Spaces(); lastExp.addNewLines(); | |
1159 Expr exp = Field(); | |
1160 if( exp != null ) { | |
1161 builder.add(exp); | |
1162 lastExp = exp; | |
1163 Spaces(); lastExp.addNewLines(); | |
1164 } | |
1165 } while( FieldSep() ); | |
674 | 1166 Expr exp = TemplateExpressions(In.NOTHING); |
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1167 if( exp != null ) |
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1168 builder.add(exp); |
107
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1169 if( !parser.match('}') ) |
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1170 throw parser.exception("Expected table element or '}'"); |
682 | 1171 tblExp.addAll( expString(builder).array() ); |
1172 tblExp.add( ")" ); | |
679
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1173 Spaces(); |
682 | 1174 tblExp.addNewLines(); |
1175 return parser.success( tblExp ); | |
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1176 } |
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1177 |
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1178 private boolean FieldSep() throws ParseException { |
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1179 return parser.anyOf(",;") || EndOfLine(); |
14
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1180 } |
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1181 |
682 | 1182 private Expr Field() throws ParseException { |
104
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1183 parser.begin(); |
674 | 1184 Expr exp = SubExpr(In.NOTHING); |
104
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1185 if( exp==null ) |
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1186 exp = NameExpr(); |
104
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1187 if( exp!=null && parser.match('=') ) { |
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1188 Spaces(); |
674 | 1189 Expr val = RequiredExpr(In.NOTHING).single(); |
1190 Expr newExp = new Expr(Val.SINGLE,false); | |
677 | 1191 newExp.add( "new TableField(" ); |
1192 newExp.addAll( exp ); | |
1193 newExp.add( "," ); | |
1194 newExp.addAll( val ); | |
1195 newExp.add( ")" ); | |
682 | 1196 return parser.success(newExp); |
17
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1197 } |
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1198 parser.rollback(); |
674 | 1199 Expr exprs = ExprZ(In.NOTHING); |
154
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1200 if( exprs != null ) { |
682 | 1201 return parser.success(exprs); |
104
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1202 } |
682 | 1203 return parser.failure(null); |
7
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1204 } |
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1205 |
674 | 1206 private Expr VarExp(In in) throws ParseException { |
129
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1207 Var var = VarZ(in); |
656 | 1208 return var==null ? null : var.exp(); |
8
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1209 } |
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1210 |
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1211 private Var VarZ(In in) throws ParseException { |
645 | 1212 parser.begin(); |
1213 Var var = VarStart(in); | |
104
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1214 if( var==null ) |
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1215 return parser.failure(null); |
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1216 Var var2; |
656 | 1217 while( (var2=Var2(in,var.exp())) != null ) { |
104
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1218 var = var2; |
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1219 } |
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1220 return parser.success(var); |
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1221 } |
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1222 |
645 | 1223 private Var VarStart(In in) throws ParseException { |
206
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1224 if( parser.match('(') ) { |
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1225 Spaces(); |
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1226 Expr exp = RequiredExpr(in).single(); |
206
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1227 RequiredMatch(')'); |
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1228 Spaces(); |
206
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1229 return exprVar(exp); |
104
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1230 } |
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1231 String name = Name(); |
206
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1232 if( name != null ) |
645 | 1233 return nameVar(name); |
674 | 1234 Expr exp; |
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1235 exp = TableExpr(); |
206
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1236 if( exp != null ) |
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1237 return exprVar(exp); |
679
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1238 exp = Literal(); |
206
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1239 if( exp != null ) |
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1240 return exprVar(exp); |
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1241 return null; |
21
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1242 } |
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1243 |
674 | 1244 private Var Var2(In in,Expr exp1) throws ParseException { |
104
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1245 parser.begin(); |
674 | 1246 Expr exp2 = SubExpr(in); |
104
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1247 if( exp2 != null ) |
656 | 1248 return parser.success(indexVar(exp1,exp2)); |
104
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1249 if( parser.match('.') ) { |
679
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1250 Spaces(); |
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1251 exp2 = NameExpr(); |
104
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1252 if( exp2!=null ) |
656 | 1253 return parser.success(indexVar(exp1,exp2)); |
636 | 1254 return parser.failure(null); |
104
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1255 } |
674 | 1256 Expr fnCall = Args( in, exp1, new ArrayList<Expr>() ); |
206
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1257 if( fnCall != null ) |
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1258 return parser.success(exprVar(fnCall)); |
104
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1259 return parser.failure(null); |
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1260 } |
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1261 |
503 | 1262 private interface Var { |
674 | 1263 public Expr exp() throws ParseException; |
660 | 1264 // public Settable settable() throws ParseException; |
1265 public boolean isSettable(); | |
674 | 1266 public Stmts set(Expr val) throws ParseException; |
503 | 1267 } |
1268 | |
674 | 1269 private Expr env() { |
670
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1270 Sym sym = getSym("_ENV"); |
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1271 if( sym != null ) |
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1272 return sym.exp(); |
503 | 1273 return null; |
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1274 } |
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1275 |
645 | 1276 private Var nameVar(final String name) { |
104
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1277 return new Var() { |
1096 | 1278 private Expr exp = null; |
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1279 |
674 | 1280 public Expr exp() throws ParseException { |
1096 | 1281 if( exp == null ) { |
1282 String sp = parser.sb().toString(); | |
1283 parser.sb().setLength(0); | |
1284 exp = calcExp(); | |
1285 if( sp.length() > 0 ) | |
1286 exp.add(sp); | |
1287 } | |
1288 return exp; | |
1289 } | |
1290 | |
1291 private Expr calcExp() throws ParseException { | |
670
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1292 Sym sym = getSym(name); |
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1293 if( sym != null ) |
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1294 return sym.exp(); |
674 | 1295 Expr envExpr = env(); |
503 | 1296 if( envExpr != null ) |
670
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1297 return indexExpStr( envExpr, constExpStr(name) ); |
503 | 1298 parser.failure(null); |
1299 throw parser.exception("name '"+name+"' not defined"); | |
104
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1300 } |
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1301 |
660 | 1302 public boolean isSettable() { |
1303 return true; | |
1304 } | |
674 | 1305 |
1306 public Stmts set(Expr val) throws ParseException { | |
670
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1307 Sym sym = getSym(name); |
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1308 if( sym != null ) { |
674 | 1309 Stmts stmt = new Stmts(); |
677 | 1310 stmt.addAll( sym.exp() ); |
1311 stmt.add( " = " ); | |
1312 stmt.addAll( val.single() ); | |
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1313 stmt.add( "; " ); |
670
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1314 return stmt; |
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1315 } |
674 | 1316 Expr envExpr = env(); |
670
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1317 if( envExpr != null ) |
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1318 return indexVar( envExpr, constExpStr(name) ).set(val); |
687 | 1319 parser.failure(null); |
1320 throw parser.exception("name '"+name+"' not defined"); | |
660 | 1321 } |
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1322 }; |
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1323 } |
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1324 |
674 | 1325 private Var exprVar(final Expr expr) { |
104
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1326 return new Var() { |
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1327 |
674 | 1328 public Expr exp() { |
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1329 return expr; |
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1330 } |
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1331 |
660 | 1332 public boolean isSettable() { |
1333 return false; | |
1334 } | |
1335 | |
674 | 1336 public Stmts set(Expr val) { |
660 | 1337 throw new RuntimeException(); |
104
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1338 } |
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1339 }; |
11
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1340 } |
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1341 |
674 | 1342 private Var indexVar(final Expr table,final Expr key) { |
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1343 return new Var() { |
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1344 |
674 | 1345 public Expr exp() { |
656 | 1346 return indexExpStr( table, key ); |
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1347 } |
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1348 |
660 | 1349 public boolean isSettable() { |
1350 return true; | |
1351 } | |
674 | 1352 |
1353 public Stmts set(Expr val) { | |
1354 Stmts stmt = new Stmts(); | |
677 | 1355 stmt.add( "LuanImpl.put(luan," ); |
1356 stmt.addAll( table.single() ); | |
1357 stmt.add( "," ); | |
1358 stmt.addAll( key.single() ); | |
1359 stmt.add( "," ); | |
1360 stmt.addAll( val.single() ); | |
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1361 stmt.add( "); " ); |
666
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1362 return stmt; |
660 | 1363 } |
104
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1364 }; |
9
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1365 } |
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1366 |
674 | 1367 private Expr Args(In in,Expr fn,List<Expr> builder) throws ParseException { |
104
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1368 parser.begin(); |
129
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1369 return args(in,builder) |
656 | 1370 ? parser.success( callExpStr( fn, expString(builder) ) ) |
674 | 1371 : parser.failure((Expr)null); |
107
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1372 } |
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1373 |
674 | 1374 private boolean args(In in,List<Expr> builder) throws ParseException { |
645 | 1375 parser.begin(); |
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1376 if( parser.match('(') ) { |
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1377 Spaces(); |
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1378 ExpList(in,builder); // optional |
107
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1379 if( !parser.match(')') ) |
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1380 throw parser.exception("Expression or ')' expected"); |
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1381 Spaces(); |
1093
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1382 parser.upSb(); |
195
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1383 return parser.success(); |
107
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1384 } |
679
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1385 Expr exp = TableExpr(); |
107
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1386 if( exp != null ) { |
655 | 1387 builder.add(exp); |
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1388 return parser.success(); |
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1389 } |
714 | 1390 exp = StringLiteral(); |
1391 if( exp != null ) { | |
1392 builder.add(exp); | |
195
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1393 return parser.success(); |
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1394 } |
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1395 return parser.failure(); |
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1396 } |
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|
1397 |
674 | 1398 private Expr ExpStringList(In in) throws ParseException { |
1399 List<Expr> builder = new ArrayList<Expr>(); | |
654 | 1400 return ExpList(in,builder) ? expString(builder) : null; |
652
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1401 } |
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1402 |
674 | 1403 private boolean ExpList(In in,List<Expr> builder) throws ParseException { |
104
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1404 parser.begin(); |
674 | 1405 Expr exp = TemplateExpressions(in); |
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1406 if( exp != null ) { |
654 | 1407 builder.add(exp); |
158
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1408 return parser.success(); |
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1409 } |
654 | 1410 exp = ExprZ(in); |
1411 if( exp==null ) | |
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1412 return parser.failure(); |
700 | 1413 exp.addNewLines(); |
654 | 1414 builder.add(exp); |
104
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1415 while( parser.match(',') ) { |
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1416 Spaces(); |
158
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1417 exp = TemplateExpressions(in); |
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1418 if( exp != null ) { |
654 | 1419 builder.add(exp); |
158
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1420 return parser.success(); |
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1421 } |
700 | 1422 exp = RequiredExpr(in); |
1093
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1423 exp.prependNewLines(); |
700 | 1424 builder.add(exp); |
104
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1425 } |
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1426 return parser.success(); |
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1427 } |
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1428 |
674 | 1429 private Expr SubExpr(In in) throws ParseException { |
104
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1430 parser.begin(); |
209
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1431 if( !parser.match('[') || parser.test("[") || parser.test("=") ) |
104
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1432 return parser.failure(null); |
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1433 Spaces(); |
674 | 1434 Expr exp = RequiredExpr(In.NOTHING).single(); |
104
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1435 RequiredMatch(']'); |
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|
1436 Spaces(); |
104
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|
1437 return parser.success(exp); |
11
b7d7069fee58
add assignment statement and CmdLine
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parents:
9
diff
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|
1438 } |
b7d7069fee58
add assignment statement and CmdLine
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parents:
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diff
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|
1439 |
679
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|
1440 private Expr NameExpr() throws ParseException { |
645 | 1441 parser.begin(); |
679
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|
1442 String name = Name(); |
195
24ede40ee0aa
make MetatableGetter DeepCloneable, scoped, and secure
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1443 if( name==null ) |
24ede40ee0aa
make MetatableGetter DeepCloneable, scoped, and secure
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|
1444 return parser.failure(null); |
656 | 1445 return parser.success(constExpStr(name)); |
54
f5b27ef14d73
add OutputStmt
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parents:
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diff
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|
1446 } |
f5b27ef14d73
add OutputStmt
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|
1447 |
679
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|
1448 private String RequiredName() throws ParseException { |
104
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|
1449 parser.begin(); |
679
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|
1450 String name = Name(); |
104
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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|
1451 if( name==null ) |
139
3b384dc5ca91
replace WebShell.java with web_shell.luan
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|
1452 throw parser.exception("Name expected"); |
104
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|
1453 return parser.success(name); |
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|
1454 } |
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|
1455 |
679
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|
1456 private String Name() throws ParseException { |
104
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|
1457 int start = parser.begin(); |
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parents:
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|
1458 if( !NameFirstChar() ) |
754e6030c029
remove parboiled and rewrite parser;
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parents:
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|
1459 return parser.failure(null); |
754e6030c029
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parents:
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|
1460 while( NameChar() ); |
754e6030c029
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parents:
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|
1461 String match = parser.textFrom(start); |
754e6030c029
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parents:
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|
1462 if( keywords.contains(match) ) |
754e6030c029
remove parboiled and rewrite parser;
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parents:
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|
1463 return parser.failure(null); |
679
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|
1464 Spaces(); |
1096 | 1465 parser.upSb(); |
104
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|
1466 return parser.success(match); |
17
09d41f7490a8
add local variables
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parents:
16
diff
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|
1467 } |
09d41f7490a8
add local variables
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parents:
16
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|
1468 |
104
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|
1469 private boolean NameChar() { |
754e6030c029
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parents:
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|
1470 return NameFirstChar() || Digit(); |
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parents:
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|
1471 } |
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|
1472 |
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parents:
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|
1473 private boolean NameFirstChar() { |
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|
1474 return parser.inCharRange('a', 'z') || parser.inCharRange('A', 'Z') || parser.match('_'); |
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|
1475 } |
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1476 |
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|
1477 private void RequiredMatch(char c) throws ParseException { |
754e6030c029
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|
1478 if( !parser.match(c) ) |
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|
1479 throw parser.exception("'"+c+"' expected"); |
9
600676034a1a
add variables and tables
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parents:
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|
1480 } |
600676034a1a
add variables and tables
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parents:
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|
1481 |
104
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|
1482 private void RequiredMatch(String s) throws ParseException { |
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|
1483 if( !parser.match(s) ) |
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|
1484 throw parser.exception("'"+s+"' expected"); |
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|
1485 } |
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|
1486 |
1091
20d5968e65cc
add end_do, end_for, end_function, end_if, end_while
Franklin Schmidt <fschmidt@gmail.com>
parents:
1089
diff
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|
1487 private void RequiredEnd(String keyword) throws ParseException { |
20d5968e65cc
add end_do, end_for, end_function, end_if, end_while
Franklin Schmidt <fschmidt@gmail.com>
parents:
1089
diff
changeset
|
1488 if( !Keyword("end") && !Keyword(keyword) ) |
20d5968e65cc
add end_do, end_for, end_function, end_if, end_while
Franklin Schmidt <fschmidt@gmail.com>
parents:
1089
diff
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|
1489 throw parser.exception("'"+keyword+"' or 'end' expected"); |
20d5968e65cc
add end_do, end_for, end_function, end_if, end_while
Franklin Schmidt <fschmidt@gmail.com>
parents:
1089
diff
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|
1490 } |
20d5968e65cc
add end_do, end_for, end_function, end_if, end_while
Franklin Schmidt <fschmidt@gmail.com>
parents:
1089
diff
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|
1491 |
681 | 1492 private void RequiredKeyword(String keyword) throws ParseException { |
679
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|
1493 if( !Keyword(keyword) ) |
104
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|
1494 throw parser.exception("'"+keyword+"' expected"); |
9
600676034a1a
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parents:
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|
1495 } |
600676034a1a
add variables and tables
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parents:
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|
1496 |
679
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|
1497 private boolean Keyword(String keyword) throws ParseException { |
104
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|
1498 parser.begin(); |
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|
1499 if( !parser.match(keyword) || NameChar() ) |
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|
1500 return parser.failure(); |
679
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diff
changeset
|
1501 Spaces(); |
1093
a656fa45e315
fix multiline statements
Franklin Schmidt <fschmidt@gmail.com>
parents:
1091
diff
changeset
|
1502 parser.upSb(); |
104
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|
1503 return parser.success(); |
12
9cea1aea5eef
CmdLine can run files
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diff
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|
1504 } |
9cea1aea5eef
CmdLine can run files
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parents:
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|
1505 |
104
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|
1506 private static final Set<String> keywords = new HashSet<String>(Arrays.asList( |
12
9cea1aea5eef
CmdLine can run files
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|
1507 "and", |
9cea1aea5eef
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diff
changeset
|
1508 "break", |
1131
46732cc0ab87
add continue statement
Franklin Schmidt <fschmidt@gmail.com>
parents:
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diff
changeset
|
1509 "continue", |
12
9cea1aea5eef
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parents:
11
diff
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|
1510 "do", |
9cea1aea5eef
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parents:
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|
1511 "else", |
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|
1512 "elseif", |
9cea1aea5eef
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|
1513 "end", |
1091
20d5968e65cc
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|
1514 "end_do", |
20d5968e65cc
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parents:
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|
1515 "end_for", |
20d5968e65cc
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Franklin Schmidt <fschmidt@gmail.com>
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changeset
|
1516 "end_function", |
20d5968e65cc
add end_do, end_for, end_function, end_if, end_while
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changeset
|
1517 "end_if", |
20d5968e65cc
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Franklin Schmidt <fschmidt@gmail.com>
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changeset
|
1518 "end_while", |
12
9cea1aea5eef
CmdLine can run files
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changeset
|
1519 "false", |
9cea1aea5eef
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1520 "for", |
9cea1aea5eef
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|
1521 "function", |
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|
1522 "goto", |
9cea1aea5eef
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changeset
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1523 "if", |
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|
1524 "in", |
9cea1aea5eef
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changeset
|
1525 "local", |
9cea1aea5eef
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changeset
|
1526 "nil", |
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changeset
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1527 "not", |
9cea1aea5eef
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1528 "or", |
9cea1aea5eef
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changeset
|
1529 "repeat", |
9cea1aea5eef
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changeset
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1530 "return", |
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|
1531 "then", |
9cea1aea5eef
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changeset
|
1532 "true", |
9cea1aea5eef
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changeset
|
1533 "until", |
9cea1aea5eef
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changeset
|
1534 "while" |
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1535 )); |
9cea1aea5eef
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1536 |
679
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|
1537 private Expr Literal() throws ParseException { |
645 | 1538 parser.begin(); |
1093
a656fa45e315
fix multiline statements
Franklin Schmidt <fschmidt@gmail.com>
parents:
1091
diff
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|
1539 Expr exp = new Expr(Val.SINGLE,false); |
679
43522473599d
make java line numbers match
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diff
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|
1540 if( NilLiteral() ) { |
677 | 1541 exp.add( "null" ); |
1093
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diff
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|
1542 exp.addNewLines(); |
666
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|
1543 return parser.success(exp); |
2f449ccf54d2
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|
1544 } |
679
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make java line numbers match
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diff
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|
1545 Boolean b = BooleanLiteral(); |
666
2f449ccf54d2
use lists to assemble source
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diff
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|
1546 if( b != null ) { |
677 | 1547 exp.add( b.toString() ); |
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|
1548 exp.addNewLines(); |
666
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diff
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|
1549 return parser.success(exp); |
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|
1550 } |
679
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make java line numbers match
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|
1551 Number n = NumberLiteral(); |
657 | 1552 if( n != null ) { |
1553 String s = n.toString(); | |
1554 if( n instanceof Long ) | |
1555 s += "L"; | |
677 | 1556 exp.add( s ); |
1093
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|
1557 exp.addNewLines(); |
666
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diff
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|
1558 return parser.success(exp); |
657 | 1559 } |
714 | 1560 Expr s = StringLiteral(); |
104
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|
1561 if( s != null ) |
714 | 1562 return parser.success(s); |
195
24ede40ee0aa
make MetatableGetter DeepCloneable, scoped, and secure
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
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|
1563 return parser.failure(null); |
5
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parents:
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|
1564 } |
9ef0fd711101
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parents:
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|
1565 |
684 | 1566 private static int STR_LIM = 65000; |
1567 | |
674 | 1568 private Expr constExpStr(String s) { |
664 | 1569 s = s |
1570 .replace("\\","\\\\") | |
1571 .replace("\"","\\\"") | |
1572 .replace("\n","\\n") | |
1573 .replace("\r","\\r") | |
1574 .replace("\t","\\t") | |
1575 .replace("\b","\\b") | |
1576 ; | |
684 | 1577 if( s.length() > STR_LIM ) { |
1578 int len = s.length(); | |
1579 StringBuilder sb = new StringBuilder(); | |
1580 sb.append( "LuanImpl.strconcat(" ); | |
1581 int start = 0; | |
1582 while(true) { | |
1583 int end = start + STR_LIM; | |
1584 if( end >= len ) | |
1585 break; | |
1586 sb.append( "\"" ).append( s.substring(start,end) ).append( "\"," ); | |
1587 start = end; | |
1588 } | |
1589 sb.append( "\"" ).append( s.substring(start) ).append( "\")" ); | |
1590 s = sb.toString(); | |
1591 } else | |
1592 s = "\"" + s + "\""; | |
674 | 1593 Expr exp = new Expr(Val.SINGLE,false); |
679
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make java line numbers match
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|
1594 exp.add( s ); |
666
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|
1595 return exp; |
664 | 1596 } |
1597 | |
679
43522473599d
make java line numbers match
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|
1598 private boolean NilLiteral() throws ParseException { |
43522473599d
make java line numbers match
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678
diff
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|
1599 return Keyword("nil"); |
65
1ff53a88579a
multi-line statements
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
60
diff
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|
1600 } |
1ff53a88579a
multi-line statements
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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60
diff
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|
1601 |
679
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make java line numbers match
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diff
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|
1602 private Boolean BooleanLiteral() throws ParseException { |
43522473599d
make java line numbers match
Franklin Schmidt <fschmidt@gmail.com>
parents:
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diff
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|
1603 if( Keyword("true") ) |
104
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|
1604 return true; |
679
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make java line numbers match
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diff
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|
1605 if( Keyword("false") ) |
104
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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|
1606 return false; |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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|
1607 return null; |
5
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parents:
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|
1608 } |
9ef0fd711101
start LuaParser
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|
1609 |
679
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make java line numbers match
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diff
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|
1610 private Number NumberLiteral() throws ParseException { |
104
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|
1611 parser.begin(); |
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|
1612 Number n; |
754e6030c029
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|
1613 if( parser.matchIgnoreCase("0x") ) { |
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|
1614 n = HexNumber(); |
754e6030c029
remove parboiled and rewrite parser;
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|
1615 } else { |
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remove parboiled and rewrite parser;
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diff
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|
1616 n = DecNumber(); |
754e6030c029
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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|
1617 } |
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|
1618 if( n==null || NameChar() ) |
754e6030c029
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diff
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|
1619 return parser.failure(null); |
679
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make java line numbers match
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diff
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|
1620 Spaces(); |
1093
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fix multiline statements
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|
1621 parser.upSb(); |
104
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|
1622 return parser.success(n); |
754e6030c029
remove parboiled and rewrite parser;
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|
1623 } |
754e6030c029
remove parboiled and rewrite parser;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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|
1624 |
754e6030c029
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|
1625 private Number DecNumber() { |
754e6030c029
remove parboiled and rewrite parser;
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|
1626 int start = parser.begin(); |
535
289908469e02
parse numeric constants to ints or longs if possible
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parents:
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diff
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|
1627 boolean isInt = true; |
104
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99
diff
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|
1628 if( Int() ) { |
535
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
534
diff
changeset
|
1629 if( parser.match('.') ) { |
289908469e02
parse numeric constants to ints or longs if possible
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parents:
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diff
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|
1630 isInt = false; |
104
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diff
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|
1631 Int(); // optional |
535
289908469e02
parse numeric constants to ints or longs if possible
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parents:
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diff
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|
1632 } |
104
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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99
diff
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|
1633 } else if( parser.match('.') && Int() ) { |
754e6030c029
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|
1634 // ok |
535
289908469e02
parse numeric constants to ints or longs if possible
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parents:
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|
1635 isInt = false; |
104
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|
1636 } else |
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remove parboiled and rewrite parser;
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|
1637 return parser.failure(null); |
535
289908469e02
parse numeric constants to ints or longs if possible
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parents:
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diff
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|
1638 if( Exponent() ) // optional |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
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diff
changeset
|
1639 isInt = false; |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
534
diff
changeset
|
1640 String s = parser.textFrom(start); |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
534
diff
changeset
|
1641 if( isInt ) { |
289908469e02
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parents:
534
diff
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|
1642 try { |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
534
diff
changeset
|
1643 return parser.success(Integer.valueOf(s)); |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
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diff
changeset
|
1644 } catch(NumberFormatException e) {} |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
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diff
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|
1645 try { |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
534
diff
changeset
|
1646 return parser.success(Long.valueOf(s)); |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
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diff
changeset
|
1647 } catch(NumberFormatException e) {} |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
534
diff
changeset
|
1648 } |
289908469e02
parse numeric constants to ints or longs if possible
Franklin Schmidt <fschmidt@gmail.com>
parents:
534
diff
changeset
|
1649 return parser.success(Double.valueOf(s)); |
5
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
1650 } |
9ef0fd711101
start LuaParser
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parents:
diff
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|
1651 |
104
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|
1652 private boolean Exponent() { |
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|
1653 parser.begin(); |
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|
1654 if( !parser.matchIgnoreCase("e") ) |
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|
1655 return parser.failure(); |
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|
1656 parser.anyOf("+-"); // optional |
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|
1657 if( !Int() ) |
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|
1658 return parser.failure(); |
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|
1659 return parser.success(); |
5
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changeset
|
1660 } |
9ef0fd711101
start LuaParser
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|
1661 |
104
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|
1662 private boolean Int() { |
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|
1663 if( !Digit() ) |
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|
1664 return false; |
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|
1665 while( Digit() ); |
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|
1666 return true; |
5
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|
1667 } |
9ef0fd711101
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parents:
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|
1668 |
104
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|
1669 private boolean Digit() { |
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|
1670 return parser.inCharRange('0', '9'); |
16
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|
1671 } |
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|
1672 |
104
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|
1673 private Number HexNumber() { |
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|
1674 int start = parser.begin(); |
535
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|
1675 long nLong = 0; |
104
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|
1676 double n; |
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1677 if( HexInt() ) { |
535
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1678 nLong = Long.parseLong(parser.textFrom(start),16); |
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1679 n = (double)nLong; |
104
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1680 if( parser.match('.') ) { |
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1681 start = parser.currentIndex(); |
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1682 if( HexInt() ) { |
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1683 String dec = parser.textFrom(start); |
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1684 n += (double)Long.parseLong(dec,16) / Math.pow(16,dec.length()); |
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1685 } |
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1686 } |
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1687 } else if( parser.match('.') && HexInt() ) { |
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1688 String dec = parser.textFrom(start+1); |
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1689 n = (double)Long.parseLong(dec,16) / Math.pow(16,dec.length()); |
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1690 } else { |
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1691 return parser.failure(null); |
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1692 } |
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1693 if( parser.matchIgnoreCase("p") ) { |
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1694 parser.anyOf("+-"); // optional |
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1695 start = parser.currentIndex(); |
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1696 if( !HexInt() ) |
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1697 return parser.failure(null); |
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1698 n *= Math.pow(2,(double)Long.parseLong(parser.textFrom(start))); |
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1699 } |
535
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1700 if( nLong == n ) { |
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parse numeric constants to ints or longs if possible
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1701 int nInt = (int)nLong; |
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1702 if( nInt == nLong ) |
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parse numeric constants to ints or longs if possible
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1703 return parser.success(Integer.valueOf(nInt)); |
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parse numeric constants to ints or longs if possible
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1704 return parser.success(Long.valueOf(nLong)); |
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parse numeric constants to ints or longs if possible
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1705 } |
104
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1706 return parser.success(Double.valueOf(n)); |
16
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1707 } |
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1708 |
104
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1709 private boolean HexInt() { |
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1710 if( !HexDigit() ) |
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1711 return false; |
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1712 while( HexDigit() ); |
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1713 return true; |
16
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1714 } |
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1715 |
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1716 |
104
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1717 private boolean HexDigit() { |
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1718 return Digit() || parser.anyOf("abcdefABCDEF"); |
6
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1719 } |
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1720 |
714 | 1721 private Expr StringLiteral() throws ParseException { |
1722 Expr s; | |
104
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1723 if( (s=QuotedString('"'))==null |
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1724 && (s=QuotedString('\''))==null |
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1725 && (s=LongString())==null |
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1726 ) |
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1727 return null; |
679
43522473599d
make java line numbers match
Franklin Schmidt <fschmidt@gmail.com>
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|
1728 Spaces(); |
1093
a656fa45e315
fix multiline statements
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diff
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|
1729 s.addNewLines(); |
104
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1730 return s; |
16
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1731 } |
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1732 |
714 | 1733 private Expr LongString() throws ParseException { |
104
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1734 parser.begin(); |
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1735 if( !parser.match('[') ) |
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1736 return parser.failure(null); |
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1737 int start = parser.currentIndex(); |
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1738 while( parser.match('=') ); |
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1739 int nEquals = parser.currentIndex() - start; |
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1740 if( !parser.match('[') ) |
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1741 return parser.failure(null); |
714 | 1742 EndOfLine(); |
104
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1743 start = parser.currentIndex(); |
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1744 while( !LongBracketsEnd(nEquals) ) { |
714 | 1745 if( !(EndOfLine() || parser.anyChar()) ) |
104
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|
1746 throw parser.exception("Unclosed long string"); |
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1747 } |
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|
1748 String s = parser.text.substring( start, parser.currentIndex() - nEquals - 2 ); |
714 | 1749 String rtns = parser.sb().toString(); |
1750 parser.sb().setLength(0); | |
1751 Expr exp = constExpStr(s); | |
1752 if( rtns.length() > 0 ) | |
1753 exp.add(rtns); | |
1754 return parser.success(exp); | |
6
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1755 } |
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1756 |
714 | 1757 private Expr QuotedString(char quote) throws ParseException { |
104
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1758 parser.begin(); |
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1759 if( !parser.match(quote) ) |
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1760 return parser.failure(null); |
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1761 StringBuilder buf = new StringBuilder(); |
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1762 while( !parser.match(quote) ) { |
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1763 Character c = EscSeq(); |
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1764 if( c != null ) { |
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1765 buf.append(c); |
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1766 } else { |
271
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1767 if( parser.test('\r') || parser.test('\n') || !parser.anyChar() ) |
104
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1768 throw parser.exception("Unclosed string"); |
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1769 buf.append(parser.lastChar()); |
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1770 } |
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1771 } |
714 | 1772 return parser.success(constExpStr(buf.toString())); |
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1773 } |
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1774 |
104
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|
1775 private Character EscSeq() { |
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1776 parser.begin(); |
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1777 if( !parser.match('\\') ) |
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1778 return parser.failure(null); |
155
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1779 if( parser.match('a') ) return parser.success('\u0007'); |
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1780 if( parser.match('b') ) return parser.success('\b'); |
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1781 if( parser.match('f') ) return parser.success('\f'); |
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1782 if( parser.match('n') ) return parser.success('\n'); |
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1783 if( parser.match('r') ) return parser.success('\r'); |
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1784 if( parser.match('t') ) return parser.success('\t'); |
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1785 if( parser.match('v') ) return parser.success('\u000b'); |
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1786 if( parser.match('\\') ) return parser.success('\\'); |
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1787 if( parser.match('"') ) return parser.success('"'); |
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1788 if( parser.match('\'') ) return parser.success('\''); |
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1789 int start = parser.currentIndex(); |
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1790 if( parser.match('x') && HexDigit() && HexDigit() ) |
155
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1791 return parser.success((char)Integer.parseInt(parser.textFrom(start+1),16)); |
763 | 1792 if( parser.match('u') && HexDigit() && HexDigit() && HexDigit() && HexDigit() ) |
1793 return parser.success((char)Integer.parseInt(parser.textFrom(start+1),16)); | |
104
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1794 if( Digit() ) { |
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1795 if( Digit() ) Digit(); // optional |
155
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1796 return parser.success((char)Integer.parseInt(parser.textFrom(start))); |
104
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1797 } |
684 | 1798 if( MatchEndOfLine() ) { |
271
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1799 return parser.success('\n'); |
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1800 } |
104
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1801 return parser.failure(null); |
14
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1802 } |
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1803 |
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1804 private void Spaces() throws ParseException { |
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1805 while( parser.anyOf(" \t") || Comment() || ContinueOnNextLine() ); |
14
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1806 } |
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1807 |
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1808 private boolean ContinueOnNextLine() { |
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1809 parser.begin(); |
700 | 1810 if( parser.match('\\') && EndOfLine() ) { |
1811 parser.upSb(); | |
1812 return parser.success(); | |
1813 } else | |
1814 return parser.failure(); | |
7
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1815 } |
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1816 |
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1817 private boolean Comment() throws ParseException { |
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1818 if( LongComment() ) |
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1819 return true; |
104
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1820 if( parser.match("--") ) { |
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1821 while( parser.noneOf("\r\n") ); |
247
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1822 return true; |
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1823 } |
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1824 return false; |
18
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1825 } |
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1826 |
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1827 private boolean LongComment() throws ParseException { |
104
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1828 parser.begin(); |
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1829 if( !parser.match("--[") ) |
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1830 return parser.failure(); |
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1831 int start = parser.currentIndex(); |
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1832 while( parser.match('=') ); |
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1833 int nEquals = parser.currentIndex() - start; |
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1834 if( !parser.match('[') ) |
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1835 return parser.failure(); |
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1836 while( !LongBracketsEnd(nEquals) ) { |
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1837 if( !(EndOfLine() || parser.anyChar()) ) |
104
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1838 throw parser.exception("Unclosed comment"); |
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1839 } |
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1840 parser.upSb(); |
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1841 return parser.success(); |
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1842 } |
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1843 |
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1844 private boolean LongBracketsEnd(int nEquals) { |
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1845 parser.begin(); |
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1846 if( !parser.match(']') ) |
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1847 return parser.failure(); |
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1848 while( nEquals-- > 0 ) { |
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1849 if( !parser.match('=') ) |
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1850 return parser.failure(); |
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1851 } |
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1852 if( !parser.match(']') ) |
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1853 return parser.failure(); |
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1854 return parser.success(); |
12
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1855 } |
9cea1aea5eef
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1856 |
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1857 |
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1858 |
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1859 private class ParseList extends ArrayList { |
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1860 |
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1861 void addNewLines() { |
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1862 if( parser.sb().length() > 0 ) { |
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1863 add( parser.sb().toString() ); |
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1864 parser.sb().setLength(0); |
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1865 /* |
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1866 if( parser.sourceName.equals("stdin") ) { |
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1867 StringWriter sw = new StringWriter(); |
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1868 new Throwable().printStackTrace(new PrintWriter(sw,true)); |
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1869 // add(sw.toString()); |
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1870 } |
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1871 */ |
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1872 } |
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1873 } |
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1874 |
1093
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1875 void prependNewLines() { |
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1876 if( parser.sb().length() > 0 ) { |
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1877 add( 0, parser.sb().toString() ); |
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1878 parser.sb().setLength(0); |
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1879 } |
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1880 } |
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1881 |
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1882 ParseList() { |
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1883 addNewLines(); |
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1884 } |
677 | 1885 |
1886 @Override public boolean add(Object obj) { | |
1887 if( obj instanceof List ) throw new RuntimeException(); | |
1888 return super.add(obj); | |
1889 } | |
1890 | |
1891 @Override public void add(int index,Object obj) { | |
1892 if( obj instanceof List ) throw new RuntimeException(); | |
1893 super.add(index,obj); | |
1894 } | |
1895 | |
1896 @Override public String toString() { | |
1897 StringBuilder sb = new StringBuilder(); | |
1898 for( Object o : this ) { | |
1899 sb.append( o.toString() ); | |
1900 } | |
1901 return sb.toString(); | |
1902 } | |
1903 } | |
1904 | |
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1905 |
676 | 1906 private static AtomicInteger classCounter = new AtomicInteger(); |
648
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1907 |
674 | 1908 private enum Val { SINGLE, ARRAY } |
1909 | |
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1910 private class Expr extends ParseList { |
674 | 1911 final Val valType; |
649
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1912 final boolean isStmt; |
674 | 1913 |
1914 Expr(Val valType,boolean isStmt) { | |
1915 this.valType = valType; | |
649
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1916 this.isStmt = isStmt; |
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1917 } |
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1918 |
674 | 1919 Expr single() { |
1920 if( valType==Val.SINGLE ) | |
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1921 return this; |
674 | 1922 Expr exp = new Expr(Val.SINGLE,isStmt); |
677 | 1923 exp.add( valType==Val.ARRAY ? "LuanImpl.first(" : "Luan.first(" ); |
1924 exp.addAll( this ); | |
1925 exp.add( ")" ); | |
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1926 return exp; |
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1927 } |
674 | 1928 |
1929 Expr array() { | |
1930 if( valType==Val.ARRAY ) | |
1931 return this; | |
1932 Expr exp = new Expr(Val.ARRAY,isStmt); | |
1933 if( valType==Val.SINGLE ) { | |
677 | 1934 exp.add( "new Object[]{" ); |
1935 exp.addAll( this ); | |
1936 exp.add( "}" ); | |
674 | 1937 } else { |
677 | 1938 exp.add( "Luan.array(" ); |
1939 exp.addAll( this ); | |
1940 exp.add( ")" ); | |
674 | 1941 } |
1942 return exp; | |
1943 } | |
1944 | |
650
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1945 } |
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1946 |
674 | 1947 private Expr expString(List<Expr> list) { |
652
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1948 switch(list.size()) { |
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1949 case 0: |
1096 | 1950 { |
1951 Expr exp = new Expr(Val.ARRAY,false); | |
1952 exp.add("LuanFunction.NOTHING"); | |
1953 return exp; | |
1954 } | |
652
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1955 case 1: |
1096 | 1956 { |
1957 Expr exp = list.get(0); | |
1958 exp.prependNewLines(); | |
1959 return exp; | |
652
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1960 } |
1096 | 1961 default: |
1962 { | |
1963 Expr exp = new Expr(Val.ARRAY,false); | |
1964 int lastI = list.size() - 1; | |
1965 exp.add( "new Object[]{" ); | |
1966 for( int i=0; i<lastI; i++ ) { | |
1967 exp.addAll( list.get(i).single() ); | |
1968 exp.add( "," ); | |
1969 } | |
1970 Expr last = list.get(lastI); | |
1971 if( last.valType==Val.SINGLE ) { | |
1972 exp.addAll( last ); | |
1973 exp.add( "}" ); | |
1974 } else { | |
1975 exp.add( "}" ); | |
1976 exp.add( 0, "LuanImpl.concatArgs(" ); | |
1977 exp.add( "," ); | |
1978 exp.addAll( last ); | |
1979 exp.add( ")" ); | |
1980 } | |
1981 return exp; | |
652
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1982 } |
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1983 } |
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1984 } |
657 | 1985 |
679
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1986 private class Stmts extends ParseList { |
663
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1987 boolean hasReturn = false; |
651
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1988 } |
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1989 |
677 | 1990 private Class toFnClass(Stmts stmts,List<UpSym> upValueSymbols) { |
676 | 1991 String className = "EXP" + classCounter.incrementAndGet(); |
678 | 1992 String classCode = toFnString(stmts,upValueSymbols,className); |
1993 try { | |
1994 //System.out.println(parser.sourceName); | |
1995 //System.out.println(classCode); | |
1996 return LuanJavaCompiler.compile("luan.impl."+className,parser.sourceName,classCode); | |
1997 } catch(ClassNotFoundException e) { | |
1998 throw new RuntimeException(e); | |
1999 } | |
2000 } | |
2001 | |
2002 private String toFnString(Stmts stmts,List<UpSym> upValueSymbols) { | |
2003 String className = "EXP" + classCounter.incrementAndGet(); | |
2004 return toFnString(stmts,upValueSymbols,className); | |
2005 } | |
2006 | |
2007 private String toFnString(Stmts stmts,List<UpSym> upValueSymbols,String className) { | |
2008 if( !stmts.hasReturn ) | |
679
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2009 stmts.add( "\nreturn LuanFunction.NOTHING;" ); |
678 | 2010 return "" |
679
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2011 +"package luan.impl; " |
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|
2012 +"import luan.Luan; " |
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|
2013 +"import luan.LuanFunction; " |
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|
2014 +"import luan.LuanState; " |
1133 | 2015 +"import luan.LuanJavaOk; " |
679
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2016 +"import luan.LuanException; " |
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|
2017 +"import luan.modules.PackageLuan; " |
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2018 |
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|
2019 +"public class " + className +" extends Closure { " |
1133 | 2020 +"public "+className+"(LuanJavaOk java) throws LuanException { " |
679
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2021 +"super("+upValueSymbols.size()+",java); " |
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2022 + init(upValueSymbols) |
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2023 +"} " |
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2024 |
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2025 +"@Override public Object doCall(LuanState luan,Object[] args) throws LuanException { " |
688 | 2026 +"final Pointer[] parentUpValues = upValues; " |
679
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2027 +"Object t; " |
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|
2028 +"Object[] a; " |
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|
2029 + stmts |
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|
2030 +"\n} " |
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|
2031 +"}\n" |
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|
2032 ; |
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2033 } |
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2034 |
681 | 2035 private Expr toFnExp(Stmts stmt,List<UpSym> upValueSymbols,String name) { |
679
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|
2036 stmt.addNewLines(); |
678 | 2037 if( !stmt.hasReturn ) |
679
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|
2038 stmt.add( "return LuanFunction.NOTHING; " ); |
674 | 2039 Expr exp = new Expr(Val.SINGLE,false); |
677 | 2040 exp.add( "" |
1133 | 2041 +"new Closure("+upValueSymbols.size()+",javaOk) { " |
679
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|
2042 +"{ " |
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|
2043 + init(upValueSymbols) |
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|
2044 +"} " |
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|
2045 +"@Override public Object doCall(LuanState luan,Object[] args) throws LuanException { " |
681 | 2046 ); |
2047 if( name != null ) { | |
2048 exp.add( "" | |
2049 +"return _" + name + "(luan,args); " | |
2050 +"} " | |
2051 +"private Object _" + name + "(LuanState luan,Object[] args) throws LuanException { " | |
2052 ); | |
2053 } | |
2054 exp.add( "" | |
688 | 2055 +"final Pointer[] parentUpValues = upValues; " |
679
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2056 +"Object t; " |
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|
2057 +"Object[] a; " |
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|
2058 ); |
677 | 2059 exp.addAll( stmt ); |
2060 exp.add( "" | |
679
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|
2061 +"} " |
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|
2062 +"} " |
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|
2063 ); |
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2064 return exp; |
665 | 2065 } |
2066 | |
670
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2067 private static String init(List<UpSym> upValueSymbols) { |
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|
2068 StringBuilder sb = new StringBuilder(); |
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|
2069 for( UpSym upSym : upValueSymbols ) { |
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|
2070 sb.append( upSym.init() ); |
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2071 } |
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|
2072 return sb.toString(); |
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|
2073 } |
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|
2074 |
5
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|
2075 } |