Mercurial Hosting > luan
annotate src/luan/interp/LuaParser.java @ 16:2a30281ef47c
finish number literals;
add long string literal;
git-svn-id: https://luan-java.googlecode.com/svn/trunk@17 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Thu, 29 Nov 2012 10:36:38 +0000 |
parents | bb59d7ea223b |
children | 09d41f7490a8 |
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5
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1 package luan.interp; |
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2 |
12
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3 import java.util.Set; |
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4 import java.util.HashSet; |
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5 import java.util.Arrays; |
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6 import java.util.List; |
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7 import java.util.ArrayList; |
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8 import java.util.Scanner; |
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9 import org.parboiled.BaseParser; |
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10 import org.parboiled.Parboiled; |
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11 import org.parboiled.Rule; |
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12 import org.parboiled.parserunners.ReportingParseRunner; |
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13 import org.parboiled.support.ParsingResult; |
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14 import org.parboiled.support.Var; |
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15 import org.parboiled.support.StringVar; |
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16 import org.parboiled.support.ValueStack; |
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17 import org.parboiled.errors.ErrorUtils; |
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18 import luan.Lua; |
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19 import luan.LuaNumber; |
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20 import luan.LuaState; |
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21 |
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22 |
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23 public class LuaParser extends BaseParser<Object> { |
16
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24 int nEquals; |
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25 int parens = 0; |
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26 |
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27 boolean nEquals(int n) { |
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28 nEquals = n; |
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29 return true; |
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30 } |
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31 |
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32 boolean incParens() { |
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33 parens++; |
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34 return true; |
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35 } |
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36 |
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37 boolean decParens() { |
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38 parens--; |
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39 return true; |
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40 } |
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41 |
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42 public Rule Target() { |
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43 return Sequence( |
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44 Spaces(), |
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45 FirstOf( |
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46 Sequence( ExpList(), EOI ), |
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47 Sequence( Chunk(), EOI ) |
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48 ) |
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49 ); |
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50 } |
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51 |
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52 Rule Chunk() { |
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53 return Sequence( |
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54 push(new ArrayList<Stmt>()), |
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55 Optional( Stmt() ), |
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56 ZeroOrMore( |
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57 StmtSep(), |
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58 Optional( Stmt() ) |
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59 ), |
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60 push( newChunk() ) |
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61 ); |
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62 } |
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63 |
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64 boolean addStmt() { |
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65 Stmt stmt = (Stmt)pop(); |
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66 @SuppressWarnings("unchecked") |
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67 List<Stmt> stmts = (List<Stmt>)peek(); |
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68 stmts.add(stmt); |
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69 return true; |
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70 } |
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71 |
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72 Stmt newChunk() { |
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73 @SuppressWarnings("unchecked") |
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74 List<Stmt> stmts = (List<Stmt>)pop(); |
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75 switch( stmts.size() ) { |
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76 case 0: |
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77 return Stmt.EMPTY; |
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78 case 1: |
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79 return stmts.get(0); |
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80 default: |
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81 return new Block(stmts.toArray(new Stmt[0])); |
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82 } |
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83 } |
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84 |
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85 Rule StmtSep() { |
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86 return Sequence( |
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87 FirstOf( |
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88 ';', |
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89 Sequence( |
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90 Optional( "--", ZeroOrMore(NoneOf("\r\n")) ), |
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91 EndOfLine() |
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92 ) |
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93 ), |
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94 Spaces() |
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95 ); |
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96 } |
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97 |
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98 Rule EndOfLine() { |
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99 return FirstOf("\r\n", '\r', '\n'); |
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100 } |
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101 |
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102 Rule Stmt() { |
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103 return Sequence( |
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104 FirstOf( |
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105 WhileStmt(), |
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106 RepeatStmt(), |
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107 IfStmt(), |
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108 SetStmt(), |
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109 ExpressionsStmt() |
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110 ), |
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111 addStmt() |
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112 ); |
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113 } |
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114 |
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115 Rule WhileStmt() { |
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116 return Sequence( |
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117 "while", Spaces(), Expr(), "do", Spaces(), Chunk(), "end", Spaces(), |
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118 push( new WhileStmt( expr(pop(1)), (Stmt)pop() ) ) |
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119 ); |
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120 } |
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121 |
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122 Rule RepeatStmt() { |
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123 return Sequence( |
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124 "repeat", Spaces(), Chunk(), "until", Spaces(), Expr(), |
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125 push( new RepeatStmt( (Stmt)pop(1), expr(pop()) ) ) |
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126 ); |
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127 } |
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128 |
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129 Rule IfStmt() { |
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130 Var<Integer> n = new Var<Integer>(1); |
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131 return Sequence( |
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132 "if", Spaces(), Expr(), "then", Spaces(), Chunk(), |
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133 push(Stmt.EMPTY), |
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134 ZeroOrMore( |
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135 "elseif", Spaces(), drop(), Expr(), "then", Spaces(), Chunk(), |
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136 push(Stmt.EMPTY), |
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137 n.set(n.get()+1) |
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138 ), |
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139 Optional( |
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140 "else", Spaces(), drop(), Chunk() |
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141 ), |
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142 "end", Spaces(), |
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143 buildIfStmt(n.get()) |
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144 ); |
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145 } |
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146 |
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147 boolean buildIfStmt(int n) { |
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148 while( n-- > 0 ) { |
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149 Stmt elseStmt = (Stmt)pop(); |
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150 Stmt thenStmt = (Stmt)pop(); |
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151 Expr cnd = expr(pop()); |
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152 push( new IfStmt(cnd,thenStmt,elseStmt) ); |
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153 } |
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154 return true; |
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155 } |
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156 |
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157 Rule SetStmt() { |
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158 return Sequence( |
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159 VarList(), |
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160 '=', Spaces(), |
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161 ExpList(), |
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162 push( newSetStmt() ) |
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163 ); |
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164 } |
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165 |
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166 Rule ExpressionsStmt() { |
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167 return Sequence( |
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168 ExpList(), |
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169 push( new ExpressionsStmt((Expressions)pop()) ) |
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170 ); |
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171 } |
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172 |
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173 SetStmt newSetStmt() { |
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174 Expressions values = (Expressions)pop(); |
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175 @SuppressWarnings("unchecked") |
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176 List<SetStmt.Var> vars = (List<SetStmt.Var>)pop(); |
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177 return new SetStmt( vars.toArray(new SetStmt.Var[0]), values ); |
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178 } |
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179 |
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180 Rule VarList() { |
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181 return Sequence( |
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182 push(new ArrayList<SetStmt.Var>()), |
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183 Var(), |
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184 addToVarList(), |
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185 ZeroOrMore( |
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186 ',', Spaces(), Var(), |
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187 addToVarList() |
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188 ) |
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189 ); |
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190 } |
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191 |
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192 boolean addToVarList() { |
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193 Object obj = pop(); |
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194 if( obj==null ) |
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195 return false; |
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196 Expr key = expr(obj); |
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197 Expr table = expr(pop()); |
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198 @SuppressWarnings("unchecked") |
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199 List<SetStmt.Var> vars = (List<SetStmt.Var>)peek(); |
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200 vars.add( new SetStmt.Var(table,key) ); |
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201 return true; |
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202 } |
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203 |
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204 Rule Expr() { |
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205 return OrExpr(); |
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206 } |
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207 |
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208 Rule OrExpr() { |
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209 return Sequence( |
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210 AndExpr(), |
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211 ZeroOrMore( "or", Spaces(), AndExpr(), push( new OrExpr(expr(pop(1)),expr(pop())) ) ) |
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212 ); |
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213 } |
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214 |
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215 Rule AndExpr() { |
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216 return Sequence( |
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217 RelExpr(), |
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218 ZeroOrMore( "and", Spaces(), RelExpr(), push( new AndExpr(expr(pop(1)),expr(pop())) ) ) |
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219 ); |
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220 } |
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221 |
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222 Rule RelExpr() { |
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223 return Sequence( |
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224 ConcatExpr(), |
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225 ZeroOrMore( |
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226 FirstOf( |
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227 Sequence( "==", Spaces(), ConcatExpr(), push( new EqExpr(expr(pop(1)),expr(pop())) ) ), |
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228 Sequence( "~=", Spaces(), ConcatExpr(), push( new NotExpr(new EqExpr(expr(pop(1)),expr(pop()))) ) ), |
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229 Sequence( "<=", Spaces(), ConcatExpr(), push( new LeExpr(expr(pop(1)),expr(pop())) ) ), |
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230 Sequence( ">=", Spaces(), ConcatExpr(), push( new LeExpr(expr(pop()),expr(pop())) ) ), |
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231 Sequence( "<", Spaces(), ConcatExpr(), push( new LtExpr(expr(pop(1)),expr(pop())) ) ), |
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232 Sequence( ">", Spaces(), ConcatExpr(), push( new LtExpr(expr(pop()),expr(pop())) ) ) |
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233 ) |
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234 ) |
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235 ); |
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236 } |
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237 |
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238 Rule ConcatExpr() { |
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239 return Sequence( |
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240 SumExpr(), |
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241 Optional( "..", Spaces(), ConcatExpr(), push( new ConcatExpr(expr(pop(1)),expr(pop())) ) ) |
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242 ); |
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243 } |
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244 |
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245 Rule SumExpr() { |
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246 return Sequence( |
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247 TermExpr(), |
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248 ZeroOrMore( |
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249 FirstOf( |
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250 Sequence( '+', Spaces(), TermExpr(), push( new AddExpr(expr(pop(1)),expr(pop())) ) ), |
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251 Sequence( '-', TestNot('-'), Spaces(), TermExpr(), push( new SubExpr(expr(pop(1)),expr(pop())) ) ) |
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252 ) |
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253 ) |
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254 ); |
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255 } |
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256 |
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257 Rule TermExpr() { |
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258 return Sequence( |
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259 UnaryExpr(), |
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260 ZeroOrMore( |
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261 FirstOf( |
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262 Sequence( '*', Spaces(), UnaryExpr(), push( new MulExpr(expr(pop(1)),expr(pop())) ) ), |
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263 Sequence( '/', Spaces(), UnaryExpr(), push( new DivExpr(expr(pop(1)),expr(pop())) ) ), |
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264 Sequence( '%', Spaces(), UnaryExpr(), push( new ModExpr(expr(pop(1)),expr(pop())) ) ) |
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265 ) |
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266 ) |
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267 ); |
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268 } |
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269 |
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270 Rule UnaryExpr() { |
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271 return FirstOf( |
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272 Sequence( '#', Spaces(), PowExpr(), push( new LenExpr(expr(pop())) ) ), |
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273 Sequence( '-', TestNot('-'), Spaces(), PowExpr(), push( new UnmExpr(expr(pop())) ) ), |
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274 Sequence( "not", Spaces(), PowExpr(), push( new NotExpr(expr(pop())) ) ), |
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275 PowExpr() |
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276 ); |
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277 } |
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278 |
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279 Rule PowExpr() { |
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280 return Sequence( |
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281 SingleExpr(), |
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282 Optional( '^', Spaces(), PowExpr(), push( new PowExpr(expr(pop(1)),expr(pop())) ) ) |
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283 ); |
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284 } |
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285 |
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286 Rule SingleExpr() { |
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287 return FirstOf( |
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288 TableExpr(), |
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289 VarExp(), |
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290 LiteralExpr() |
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291 ); |
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292 } |
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293 |
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294 Rule TableExpr() { |
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295 return Sequence( |
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296 '{', incParens(), Spaces(), |
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297 push( new ArrayList<TableExpr.Field>() ), |
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298 push( 1.0 ), // counter |
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299 Optional( |
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300 Field(), |
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301 ZeroOrMore( |
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302 FieldSep(), |
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303 Field() |
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304 ), |
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305 Optional( FieldSep() ) |
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306 ), |
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307 '}', decParens(), |
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308 push( newTableExpr() ), |
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309 Spaces() |
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310 ); |
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311 } |
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312 |
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313 TableExpr newTableExpr() { |
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314 pop(); // counter |
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315 @SuppressWarnings("unchecked") |
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316 List<TableExpr.Field> list = (List<TableExpr.Field>)pop(); |
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317 return new TableExpr(list.toArray(new TableExpr.Field[0])); |
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318 } |
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319 |
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320 Rule FieldSep() { |
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321 return Sequence( AnyOf(",;"), Spaces() ); |
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322 } |
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323 |
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324 Rule Field() { |
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325 return FirstOf( |
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326 Sequence( |
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327 FirstOf( SubExpr(), Name() ), |
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328 '=', Spaces(), Expr(), |
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329 addField() |
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330 ), |
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331 Sequence( |
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332 Expr(), |
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333 addIndexedField() |
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334 ) |
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335 ); |
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336 } |
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337 |
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338 boolean addField() { |
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339 TableExpr.Field field = new TableExpr.Field( expr(pop(1)), expr(pop()) ); |
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340 @SuppressWarnings("unchecked") |
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341 List<TableExpr.Field> list = (List<TableExpr.Field>)peek(1); |
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342 list.add(field); |
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343 return true; |
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344 } |
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345 |
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346 boolean addIndexedField() { |
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347 Expr val = expr(pop()); |
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348 double i = (Double)pop(); |
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349 TableExpr.Field field = new TableExpr.Field( new ConstExpr(new LuaNumber(i)), val ); |
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350 push( i + 1 ); |
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351 @SuppressWarnings("unchecked") |
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352 List<TableExpr.Field> list = (List<TableExpr.Field>)peek(1); |
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353 list.add(field); |
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354 return true; |
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355 } |
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356 |
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357 static Expr expr(Object obj) { |
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358 if( obj instanceof Expressions ) |
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359 return new ExpressionsExpr((Expressions)obj); |
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360 return (Expr)obj; |
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361 } |
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362 |
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363 Rule VarExp() { |
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364 return Sequence( |
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365 Var(), |
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366 makeVarExp() |
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367 ); |
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368 } |
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369 |
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370 Rule Var() { |
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371 return Sequence( |
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372 FirstOf( |
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373 Sequence( |
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374 '(', incParens(), Spaces(), Expr(), ')', decParens(), Spaces(), |
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375 push(expr(pop())), |
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376 push(null) // marker |
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377 ), |
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378 Sequence( |
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379 push(EnvExpr.INSTANCE), |
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380 Name() |
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381 ) |
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382 ), |
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383 ZeroOrMore( |
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384 makeVarExp(), |
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385 FirstOf( |
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386 SubExpr(), |
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387 Sequence( '.', Spaces(), Name() ), |
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388 Sequence( |
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389 Args(), |
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390 push(null) // marker |
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391 ) |
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392 ) |
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393 ) |
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394 ); |
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395 } |
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396 |
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397 boolean makeVarExp() { |
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398 Object obj = pop(); |
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399 if( obj==null ) |
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400 return true; |
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401 return push( new GetExpr( expr(pop()), expr(obj) ) ); |
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402 } |
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403 |
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404 // function should be on top of the stack |
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405 Rule Args() { |
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406 return Sequence( |
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407 FirstOf( |
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408 Sequence( |
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409 '(', incParens(), Spaces(), Expressions(), ')', decParens(), Spaces() |
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410 ), |
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411 Sequence( |
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412 TableExpr(), |
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413 push( new ExpList.SingleExpList(expr(pop())) ) |
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414 ), |
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415 Sequence( |
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416 StringLiteral(), Spaces(), |
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417 push( new ExpList.SingleExpList(new ConstExpr(pop())) ) |
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418 ) |
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419 ), |
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420 push( new FnCall( expr(pop(1)), (Expressions)pop() ) ) |
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421 ); |
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422 } |
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423 |
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424 Rule Expressions() { |
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425 return FirstOf( |
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426 ExpList(), |
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427 push( ExpList.emptyExpList ) |
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428 ); |
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429 } |
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430 |
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431 Rule ExpList() { |
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432 return Sequence( |
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433 push(new ExpList.Builder()), |
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434 Expr(), |
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435 addToExpList(), |
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436 ZeroOrMore( |
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437 ',', Spaces(), Expr(), |
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438 addToExpList() |
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439 ), |
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440 push( ((ExpList.Builder)pop()).build() ) |
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441 ); |
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442 } |
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443 |
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444 boolean addToExpList() { |
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445 Object obj = pop(); |
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446 ExpList.Builder bld = (ExpList.Builder)peek(); |
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447 if( obj instanceof Expressions ) { |
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448 bld.add( (Expressions)obj ); |
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449 } else { |
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450 bld.add( (Expr)obj ); |
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451 } |
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452 return true; |
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453 } |
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454 |
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455 Rule SubExpr() { |
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456 return Sequence( '[', incParens(), Spaces(), Expr(), ']', decParens(), Spaces() ); |
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457 } |
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458 |
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459 Rule Name() { |
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460 return Sequence( |
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461 Sequence( |
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462 NameStart(), |
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463 ZeroOrMore( |
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464 FirstOf( NameStart(), Digit() ) |
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465 ) |
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466 ), |
12
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467 pushNameExpr(), |
9
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468 Spaces() |
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469 ); |
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470 } |
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471 |
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472 Rule NameStart() { |
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473 return FirstOf( |
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474 CharRange('a', 'z'), |
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475 CharRange('A', 'Z'), |
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476 '_' |
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477 ); |
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478 } |
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479 |
12
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480 boolean pushNameExpr() { |
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481 String name = match(); |
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482 if( keywords.contains(name) ) |
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483 return false; |
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484 return push( new ConstExpr(name) ); |
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485 } |
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486 |
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487 private static final Set<String> keywords = new HashSet<String>(Arrays.asList( |
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488 "and", |
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489 "break", |
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490 "do", |
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491 "else", |
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492 "elseif", |
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493 "end", |
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494 "false", |
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495 "for", |
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496 "function", |
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497 "goto", |
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498 "if", |
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499 "in", |
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500 "local", |
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501 "nil", |
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502 "not", |
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503 "or", |
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504 "repeat", |
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505 "return", |
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506 "then", |
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507 "true", |
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508 "until", |
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509 "while" |
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510 )); |
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511 |
7
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512 Rule LiteralExpr() { |
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513 return Sequence( |
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514 Literal(), Spaces(), |
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515 push(new ConstExpr(pop())) |
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516 ); |
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517 } |
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518 |
7
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519 Rule Literal() { |
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520 return FirstOf( |
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521 NilLiteral(), |
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522 BooleanLiteral(), |
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523 NumberLiteral(), |
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524 StringLiteral() |
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525 ); |
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526 } |
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527 |
7
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528 Rule NilLiteral() { |
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529 return Sequence( "nil", push(null) ); |
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530 } |
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531 |
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532 Rule BooleanLiteral() { |
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533 return FirstOf( |
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534 Sequence( "true", push(true) ), |
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535 Sequence( "false", push(false) ) |
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536 ); |
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537 } |
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538 |
7
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539 Rule NumberLiteral() { |
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540 return Sequence( |
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541 Number(), |
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542 push(new LuaNumber((Double)pop())) |
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543 ); |
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544 } |
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545 |
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546 Rule Number() { |
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547 return FirstOf( |
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548 Sequence( |
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549 IgnoreCase("0x"), |
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550 HexNumber() |
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551 ), |
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552 Sequence( |
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553 DecNumber(), |
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554 push(Double.parseDouble(match())) |
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555 ) |
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556 ); |
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557 } |
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558 |
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559 Rule DecNumber() { |
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560 return FirstOf( |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
561 Sequence( |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
562 Int(), |
7
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work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
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563 Optional( '.', Optional(Int()) ), |
11
b7d7069fee58
add assignment statement and CmdLine
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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9
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564 Exponent() |
5
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start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
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|
565 ), |
11
b7d7069fee58
add assignment statement and CmdLine
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
9
diff
changeset
|
566 Sequence( '.', Int(), Exponent() ) |
5
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
567 ); |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
568 } |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
569 |
11
b7d7069fee58
add assignment statement and CmdLine
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
9
diff
changeset
|
570 Rule Exponent() { |
5
9ef0fd711101
start LuaParser
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parents:
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|
571 return Optional( |
9ef0fd711101
start LuaParser
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parents:
diff
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|
572 IgnoreCase('e'), |
9ef0fd711101
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parents:
diff
changeset
|
573 Optional(AnyOf("+-")), |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
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|
574 Int() |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
575 ); |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
576 } |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
577 |
6
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more parsing
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|
578 Rule Int() { |
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579 return OneOrMore(Digit()); |
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580 } |
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|
581 |
16
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
582 Rule Digit() { |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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583 return CharRange('0', '9'); |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
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|
584 } |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
585 |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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|
586 Rule HexNumber() { |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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587 return FirstOf( |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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|
588 Sequence( |
2a30281ef47c
finish number literals;
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|
589 HexInt(), |
2a30281ef47c
finish number literals;
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590 push( (double)Long.parseLong(match(),16) ), |
2a30281ef47c
finish number literals;
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parents:
15
diff
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591 Optional( '.', Optional(HexDec()) ), |
2a30281ef47c
finish number literals;
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parents:
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592 HexExponent() |
2a30281ef47c
finish number literals;
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parents:
15
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593 ), |
2a30281ef47c
finish number literals;
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parents:
15
diff
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594 Sequence( push(0.0), '.', HexDec(), HexExponent() ) |
2a30281ef47c
finish number literals;
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changeset
|
595 ); |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff
changeset
|
596 } |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
597 |
2a30281ef47c
finish number literals;
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diff
changeset
|
598 Rule HexDec() { |
2a30281ef47c
finish number literals;
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|
599 return Sequence( |
2a30281ef47c
finish number literals;
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parents:
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|
600 HexInt(), |
2a30281ef47c
finish number literals;
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parents:
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601 push( (Double)pop() + (double)Long.parseLong(match(),16) / Math.pow(16,matchLength()) ) |
2a30281ef47c
finish number literals;
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parents:
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diff
changeset
|
602 ); |
2a30281ef47c
finish number literals;
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parents:
15
diff
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|
603 } |
2a30281ef47c
finish number literals;
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parents:
15
diff
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|
604 |
2a30281ef47c
finish number literals;
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parents:
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diff
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|
605 Rule HexExponent() { |
2a30281ef47c
finish number literals;
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606 return Optional( |
2a30281ef47c
finish number literals;
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parents:
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607 IgnoreCase('p'), |
2a30281ef47c
finish number literals;
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608 Sequence( |
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finish number literals;
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parents:
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|
609 Optional(AnyOf("+-")), |
2a30281ef47c
finish number literals;
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parents:
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|
610 HexInt() |
2a30281ef47c
finish number literals;
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parents:
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|
611 ), |
2a30281ef47c
finish number literals;
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parents:
15
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612 push( (Double)pop() * Math.pow(2,(double)Long.parseLong(match())) ) |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
613 ); |
2a30281ef47c
finish number literals;
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parents:
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diff
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|
614 } |
2a30281ef47c
finish number literals;
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parents:
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diff
changeset
|
615 |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
616 Rule HexInt() { |
2a30281ef47c
finish number literals;
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617 return OneOrMore(Digit()); |
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finish number literals;
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parents:
15
diff
changeset
|
618 } |
2a30281ef47c
finish number literals;
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parents:
15
diff
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|
619 |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
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|
620 |
6
a315783c9524
more parsing
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parents:
5
diff
changeset
|
621 Rule HexDigit() { |
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622 return FirstOf( |
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diff
changeset
|
623 Digit(), |
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|
624 AnyOf("abcdefABCDEF") |
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|
625 ); |
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|
626 } |
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diff
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|
627 |
7
bca8fc5d928b
work on expressions
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diff
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|
628 Rule StringLiteral() { |
6
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629 return FirstOf( |
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630 QuotedString('"'), |
16
2a30281ef47c
finish number literals;
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parents:
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diff
changeset
|
631 QuotedString('\''), |
2a30281ef47c
finish number literals;
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|
632 LongString() |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
633 ); |
2a30281ef47c
finish number literals;
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|
634 } |
2a30281ef47c
finish number literals;
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diff
changeset
|
635 |
2a30281ef47c
finish number literals;
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parents:
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diff
changeset
|
636 Rule LongString() { |
2a30281ef47c
finish number literals;
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637 return Sequence( |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
638 "[", |
2a30281ef47c
finish number literals;
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parents:
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diff
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|
639 ZeroOrMore('='), |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
640 nEquals(matchLength()), |
2a30281ef47c
finish number literals;
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|
641 '[', |
2a30281ef47c
finish number literals;
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parents:
15
diff
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|
642 ZeroOrMore( |
2a30281ef47c
finish number literals;
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parents:
15
diff
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|
643 TestNot(LongBracketsEnd()), |
2a30281ef47c
finish number literals;
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diff
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|
644 ANY |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
645 ), |
2a30281ef47c
finish number literals;
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parents:
15
diff
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|
646 push( match() ), |
2a30281ef47c
finish number literals;
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diff
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|
647 LongBracketsEnd() |
6
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|
648 ); |
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|
649 } |
5
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
650 |
6
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more parsing
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parents:
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diff
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|
651 Rule QuotedString(char quote) { |
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|
652 return Sequence( |
7
bca8fc5d928b
work on expressions
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parents:
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diff
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|
653 quote, |
6
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654 push(new StringBuffer()), |
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diff
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|
655 ZeroOrMore( |
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656 FirstOf( |
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|
657 Sequence( |
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658 NoneOf("\\\n"+quote), |
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659 append(matchedChar()) |
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660 ), |
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661 EscSeq() |
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662 ) |
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663 ), |
7
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664 quote, |
6
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665 push(((StringBuffer)pop()).toString()) |
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666 ); |
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667 } |
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668 |
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669 Rule EscSeq() { |
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670 return Sequence( |
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671 '\\', |
6
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672 FirstOf( |
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673 Sequence( 'a', append('\u0007') ), |
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674 Sequence( 'b', append('\b') ), |
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675 Sequence( 'f', append('\f') ), |
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676 Sequence( 'n', append('\n') ), |
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677 Sequence( 'r', append('\r') ), |
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678 Sequence( 't', append('\t') ), |
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679 Sequence( 'v', append('\u000b') ), |
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680 Sequence( '\\', append('\\') ), |
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681 Sequence( '"', append('"') ), |
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682 Sequence( '\'', append('\'') ), |
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683 Sequence( |
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684 'x', |
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685 Sequence( HexDigit(), HexDigit() ), |
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686 append( (char)Integer.parseInt(match(),16) ) |
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687 ), |
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688 Sequence( |
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689 Sequence( |
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690 Digit(), |
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691 Optional( |
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692 Digit(), |
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693 Optional( |
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694 Digit() |
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695 ) |
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696 ) |
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697 ), |
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698 append( (char)Integer.parseInt(match()) ) |
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699 ) |
6
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700 ) |
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701 ); |
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702 } |
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703 |
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704 boolean append(char ch) { |
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705 StringBuffer sb = (StringBuffer)peek(); |
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706 sb.append(ch); |
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707 return true; |
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708 } |
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709 |
12
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710 Rule Spaces() { |
14
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711 return ZeroOrMore( |
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712 FirstOf( |
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713 AnyOf(" \t"), |
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714 Comment(), |
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715 Sequence( '\\', EndOfLine() ), |
16
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716 Sequence( AnyOf("\r\n"), parens > 0 ) |
14
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|
717 ) |
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|
718 ); |
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719 } |
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720 |
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|
721 Rule Comment() { |
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722 return Sequence( |
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|
723 "--[", |
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724 ZeroOrMore('='), |
16
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|
725 nEquals(matchLength()), |
14
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|
726 '[', |
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|
727 ZeroOrMore( |
16
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|
728 TestNot(LongBracketsEnd()), |
14
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|
729 ANY |
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|
730 ), |
16
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|
731 LongBracketsEnd() |
14
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|
732 ); |
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733 } |
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734 |
16
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|
735 Rule LongBracketsEnd() { |
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736 return Sequence( ']', ZeroOrMore('='), nEquals==matchLength(), ']' ); |
7
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737 } |
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738 |
12
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|
739 // for debugging |
14
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|
740 boolean print(Object o) { |
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741 System.out.println(o); |
12
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|
742 return true; |
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743 } |
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|
744 |
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|
745 // for testing |
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|
746 public static void main(String[] args) throws Exception { |
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|
747 LuaParser parser = Parboiled.createParser(LuaParser.class); |
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748 while( true ) { |
6
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749 String input = new Scanner(System.in).nextLine(); |
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|
750 ParsingResult<?> result = new ReportingParseRunner(parser.Target()).run(input); |
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|
751 if( result.hasErrors() ) { |
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|
752 System.out.println("Parse Errors:\n" + ErrorUtils.printParseErrors(result)); |
9ef0fd711101
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753 } else { |
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754 Expr expr = expr(result.resultValue); |
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755 LuaState lua = new LuaState(); |
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756 Object val = expr.eval(lua); |
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757 System.out.println("Result: "+Lua.toString(val)); |
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758 } |
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759 } |
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760 } |
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761 } |