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annotate src/luan/modules/BasicLuan.java @ 1828:09e90d94b7b5 default tip
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 15 Sep 2024 19:51:16 -0600 |
parents | 7793bcb5f34a |
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167
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1 package luan.modules; |
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3 import java.io.InputStreamReader; |
12
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4 import java.io.IOException; |
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5 import java.lang.reflect.Method; |
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6 import java.util.Iterator; |
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7 import java.util.Map; |
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8 import java.util.List; |
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9 import java.util.ArrayList; |
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10 import java.util.Arrays; |
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11 import java.util.HashSet; |
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12 import goodjava.json.JsonToString; |
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13 import luan.Luan; |
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14 import luan.LuanTable; |
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15 import luan.LuanFunction; |
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16 import luan.LuanException; |
1578 | 17 import luan.LuanMutable; |
1189 | 18 import luan.modules.parsers.LuanToString; |
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19 |
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20 |
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21 public final class BasicLuan { |
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22 |
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23 public static String type(Object obj) { |
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24 return Luan.type(obj); |
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25 } |
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26 |
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27 public static LuanFunction load(Luan luan,String text,String sourceName,boolean persist,LuanTable env) |
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28 throws LuanException |
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29 { |
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30 Utils.checkNotNull(text); |
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31 Utils.checkNotNull(sourceName,1); |
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32 return luan.load(text,sourceName,persist,env); |
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33 } |
1424 | 34 /* |
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35 public static LuanFunction load_file(Luan luan,String fileName) throws LuanException { |
693
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36 if( fileName == null ) { |
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37 fileName = "stdin:"; |
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38 } else if( fileName.indexOf(':') == -1 ) { |
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39 fileName = "file:" + fileName; |
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40 } |
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41 String src = PackageLuan.read(luan,fileName); |
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42 if( src == null ) |
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43 return null; |
1335 | 44 return load(luan,src,fileName,null); |
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45 } |
1424 | 46 */ |
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47 public static LuanFunction pairs(Luan luan,final LuanTable t) throws LuanException { |
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48 Utils.checkNotNull(t); |
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49 return t.pairs(luan); |
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50 } |
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51 |
1578 | 52 private static final class Ipairs extends LuanFunction implements LuanMutable { |
1335 | 53 List<Object> list; |
54 int i = 0; | |
55 final int size; | |
56 | |
57 Ipairs(LuanTable t) { | |
58 list = t.asList(); | |
59 size = list.size(); | |
60 } | |
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61 |
1794 | 62 @Override public Object[] call(Luan luan,Object[] args) throws LuanException { |
1335 | 63 if( i >= size ) |
64 return LuanFunction.NOTHING; | |
1794 | 65 try { |
66 Object val = list.get(i++); | |
67 return new Object[]{i,val}; | |
68 } catch(IndexOutOfBoundsException e) { | |
69 if( size != list.size() ) | |
70 throw new LuanException("list was modified during ipairs iteration"); | |
71 throw e; | |
72 } | |
1335 | 73 } |
74 | |
1578 | 75 @Override public boolean isImmutable() { |
76 return false; | |
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77 } |
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78 |
1578 | 79 @Override public void makeImmutable() { |
80 throw new RuntimeException("ipairs cannot be made immutable"); | |
1561 | 81 } |
1335 | 82 } |
83 | |
84 public static LuanFunction ipairs(LuanTable t) throws LuanException { | |
85 Utils.checkNotNull(t); | |
86 return new Ipairs(t); | |
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87 } |
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88 |
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89 public static Object get_metatable(LuanTable table) throws LuanException { |
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90 Utils.checkNotNull(table); |
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91 LuanTable metatable = table.getMetatable(); |
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92 if( metatable == null ) |
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93 return null; |
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94 Object obj = metatable.rawGet("__metatable"); |
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95 return obj!=null ? obj : metatable; |
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96 } |
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97 |
1578 | 98 public static void set_metatable(Luan luan,LuanTable table,LuanTable metatable) throws LuanException { |
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99 Utils.checkNotNull(table); |
1578 | 100 if( table.getHandler(luan,"__metatable") != null ) |
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101 throw new LuanException("cannot change a protected metatable"); |
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102 table.setMetatable(metatable); |
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103 } |
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104 |
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105 public static boolean raw_equal(Object v1,Object v2) { |
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106 return v1 == v2 || v1 != null && v1.equals(v2); |
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107 } |
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108 |
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109 public static Object raw_get(LuanTable table,Object index) { |
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110 return table.rawGet(index); |
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111 } |
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112 |
1330 | 113 public static void raw_set(LuanTable table,Object index,Object value) throws LuanException { |
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114 table.rawPut(index,value); |
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115 } |
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116 |
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117 public static int raw_len(Object v) throws LuanException { |
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118 if( v instanceof String ) { |
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119 String s = (String)v; |
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120 return s.length(); |
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121 } |
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122 if( v instanceof LuanTable ) { |
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123 LuanTable t = (LuanTable)v; |
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124 return t.rawLength(); |
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125 } |
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126 throw new LuanException( "bad argument #1 to 'raw_len' (table or string expected)" ); |
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127 } |
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128 |
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129 public static String to_string(Luan luan,Object v) throws LuanException { |
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130 return luan.luanToString(v); |
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131 } |
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132 |
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133 public static LuanTable new_error(Luan luan,Object msg) throws LuanException { |
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134 String s = luan.luanToString(msg); |
1267 | 135 LuanTable tbl = new LuanException(s).table(luan); |
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136 tbl.rawPut( "message", msg ); |
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137 return tbl; |
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138 } |
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139 |
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140 public static int assert_integer(int v) { |
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141 return v; |
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142 } |
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143 |
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144 public static long assert_long(long v) { |
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145 return v; |
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146 } |
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147 |
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148 public static double assert_double(double v) { |
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149 return v; |
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150 } |
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151 |
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152 public static float assert_float(float v) { |
1130 | 153 return v; |
154 } | |
155 | |
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156 public static LuanFunction range(final double from,final double to,Double stepV) throws LuanException { |
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157 final double step = stepV==null ? 1.0 : stepV; |
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158 if( step == 0.0 ) |
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159 throw new LuanException("bad argument #3 (step may not be zero)"); |
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160 return new LuanFunction() { |
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161 double v = from; |
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162 |
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163 @Override public Object call(Luan luan,Object[] args) { |
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164 if( step > 0.0 && v > to || step < 0.0 && v < to ) |
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165 return LuanFunction.NOTHING; |
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166 double rtn = v; |
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167 v += step; |
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168 return rtn; |
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169 } |
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170 }; |
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171 } |
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172 |
1578 | 173 private static final class Values extends LuanFunction implements LuanMutable { |
1335 | 174 Object[] args; |
175 int i = 0; | |
176 | |
177 Values(Object[] args) { | |
178 this.args = args; | |
179 } | |
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180 |
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181 @Override public Object[] call(Luan luan,Object[] x) { |
1335 | 182 if( i >= args.length ) |
183 return LuanFunction.NOTHING; | |
184 Object val = args[i++]; | |
185 return new Object[]{i,val}; | |
186 } | |
187 | |
1578 | 188 @Override public boolean isImmutable() { |
189 return false; | |
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190 } |
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191 |
1578 | 192 @Override public void makeImmutable() { |
193 throw new RuntimeException("values cannot be made immutable"); | |
1561 | 194 } |
1335 | 195 } |
196 | |
197 public static LuanFunction values(final Object... args) throws LuanException { | |
198 return new Values(args); | |
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199 } |
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200 |
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201 private LuanFunction fn(Object obj) { |
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202 return obj instanceof LuanFunction ? (LuanFunction)obj : null; |
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203 } |
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204 |
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205 public static String number_type(Number v) throws LuanException { |
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206 Utils.checkNotNull(v); |
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207 return v.getClass().getSimpleName().toLowerCase(); |
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208 } |
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209 |
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210 public static int hash_code(Object obj) throws LuanException { |
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211 if( obj == null ) { |
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212 return 0; |
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213 } else if( obj instanceof byte[] ) { |
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214 return Arrays.hashCode((byte[])obj); |
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215 } else { |
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216 return obj.hashCode(); |
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217 } |
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218 } |
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219 |
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220 public static String stringify(Luan luan,Object obj,Object options) throws LuanException { |
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221 if( options == null ) |
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222 return new LuanToString(luan).toString(obj); |
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223 if( options instanceof LuanTable ) |
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224 return new LuanToString(luan,(LuanTable)options).toString(obj); |
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225 if( options instanceof LuanFunction ) |
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226 return new LuanToString(luan,(LuanFunction)options).toString(obj); |
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227 throw new LuanException("options must be table of function"); |
1189 | 228 } |
229 | |
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230 public static String json_string(Object obj,LuanTable options) throws LuanException { |
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231 JsonToString jts = new JsonToString(); |
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232 if( options != null ) { |
1420 | 233 options = new LuanTable(options); |
234 Boolean compressed = Utils.removeBoolean(options,"compressed"); | |
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235 if( compressed != null ) |
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236 jts.compressed = compressed; |
1420 | 237 Utils.checkEmpty(options); |
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238 } |
1805 | 239 return jts.toString(Luan.toJava(obj)); |
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240 } |
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241 |
1578 | 242 public static Object get_local_cloned(Luan luan,Object obj,Object key) { |
243 return luan.getLocalCloned(obj,key); | |
244 } | |
245 | |
246 public static void set_local_cloned(Luan luan,Object obj,Object key,Object value) { | |
247 luan.setLocalCloned(obj,key,value); | |
248 } | |
249 | |
1763 | 250 public static LuanFunction pairs_local_cloned(Luan luan,Object obj) throws LuanException { |
251 return luan.pairsLocalCloned(obj); | |
252 } | |
253 | |
1578 | 254 public static Object get_local_only(Luan luan,Object obj,Object key) { |
255 return luan.getLocalOnly(obj,key); | |
256 } | |
257 | |
258 public static void set_local_only(Luan luan,Object obj,Object key,Object value) { | |
259 luan.setLocalOnly(obj,key,value); | |
260 } | |
261 | |
1763 | 262 public static LuanFunction pairs_local_only(Luan luan,Object obj) throws LuanException { |
263 return luan.pairsLocalOnly(obj); | |
264 } | |
265 | |
1578 | 266 public static boolean is_immutable(LuanMutable m) { |
267 return m.isImmutable(); | |
268 } | |
269 | |
1330 | 270 private void BasicLuan() {} // never |
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271 } |