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annotate core/src/luan/modules/BasicLuan.java @ 297:899253043270

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remove PackageLuan.load_lib() git-svn-id: https://luan-java.googlecode.com/svn/trunk@298 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 16 Dec 2014 03:26:43 +0000
parents 7ea6dfdf81ba
children a74559240b4f
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rev   line source
167
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diff changeset
1 package luan.modules;
2
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3 import java.io.InputStreamReader;
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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 luan.Luan;
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11 import luan.LuanState;
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12 import luan.LuanTable;
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13 import luan.LuanFunction;
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14 import luan.LuanJavaFunction;
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15 import luan.LuanException;
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16 import luan.LuanSource;
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17 import luan.LuanElement;
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18 import luan.impl.LuanCompiler;
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21 public final class BasicLuan {
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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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27 public static LuanFunction load(LuanState luan,String text,String sourceName,LuanTable env,Boolean allowExpr)
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28 throws LuanException
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29 {
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30 if( allowExpr==null )
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31 allowExpr = false;
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32 return LuanCompiler.compile(luan,new LuanSource(sourceName,text),env,allowExpr);
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33 }
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35 public static LuanFunction load_file(LuanState luan,String fileName,LuanTable env) throws LuanException {
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36 if( fileName == null )
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37 fileName = "stdin:";
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38 LuanFunction fn = PackageLuan.loader(luan,fileName,false,env);
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39 if( fn == null )
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40 throw luan.exception( "file '"+fileName+"' not found" );
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41 return fn;
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42 }
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44 public static Object do_file(LuanState luan,String fileName) throws LuanException {
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45 LuanFunction fn = load_file(luan,fileName,null);
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46 return luan.call(fn);
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47 }
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49 public static LuanFunction pairs(LuanState luan,final LuanTable t) throws LuanException {
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50 Utils.checkNotNull(luan,t);
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51 return new LuanFunction() {
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52 Iterator<Map.Entry<Object,Object>> iter = t.iterator();
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54 @Override public Object[] call(LuanState luan,Object[] args) {
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55 if( !iter.hasNext() )
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56 return LuanFunction.NOTHING;
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57 Map.Entry<Object,Object> entry = iter.next();
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58 return new Object[]{entry.getKey(),entry.getValue()};
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59 }
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60 };
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61 }
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62
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63 public static LuanFunction ipairs(LuanState luan,final LuanTable t) throws LuanException {
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64 Utils.checkNotNull(luan,t);
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65 return new LuanFunction() {
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66 List<Object> list = t.asList();
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67 int i = 0;
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68 final int size = list.size();
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69
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70 @Override public Object[] call(LuanState luan,Object[] args) {
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71 if( i >= size )
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72 return LuanFunction.NOTHING;
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73 Object val = list.get(i++);
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74 return new Object[]{i,val};
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75 }
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76 };
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77 }
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78
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79 public static LuanTable get_metatable(LuanState luan,Object obj) {
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80 return luan.getMetatable(obj);
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81 }
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83 public static LuanTable set_metatable(LuanTable table,LuanTable metatable) {
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84 table.setMetatable(metatable);
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85 return table;
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86 }
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88 public static boolean raw_equal(Object v1,Object v2) {
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89 return v1 == v2 || v1 != null && v1.equals(v2);
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90 }
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92 public static Object raw_get(LuanTable table,Object index) {
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93 return table.get(index);
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94 }
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96 public static LuanTable raw_set(LuanTable table,Object index,Object value) {
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97 table.put(index,value);
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98 return table;
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99 }
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100
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101 public static int raw_len(LuanState luan,Object v) throws LuanException {
36
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102 if( v instanceof String ) {
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103 String s = (String)v;
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104 return s.length();
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105 }
48
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106 if( v instanceof LuanTable ) {
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107 LuanTable t = (LuanTable)v;
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108 return t.length();
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109 }
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110 throw luan.exception( "bad argument #1 to 'raw_len' (table or string expected)" );
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111 }
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112
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113 public static Number to_number(Object e,Integer base) {
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114 return Luan.toNumber(e,base);
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115 }
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116
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117 public static String to_string(LuanState luan,Object v) throws LuanException {
130
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118 return luan.toString(v);
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119 }
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120
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121 public static boolean to_boolean(Object v) throws LuanException {
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122 return Luan.toBoolean(v);
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123 }
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124
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125 public static void error(LuanState luan,Object msg) throws LuanException {
130
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126 throw luan.exception(msg);
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127 }
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128
64
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129 public static Object assert_(LuanState luan,Object v,String msg) throws LuanException {
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130 if( Luan.toBoolean(v) )
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131 return v;
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132 if( msg == null )
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133 msg = "assertion failed!";
130
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134 throw luan.exception( msg );
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135 }
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136
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137 public static String assert_string(LuanState luan,String v) throws LuanException {
251
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138 Utils.checkNotNull(luan,v);
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139 return v;
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140 }
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141
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142 public static Number assert_number(LuanState luan,Number v) throws LuanException {
251
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143 Utils.checkNotNull(luan,v);
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144 return v;
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145 }
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146
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147 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException {
251
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148 Utils.checkNotNull(luan,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 boolean assert_boolean(LuanState luan,boolean v) throws LuanException {
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153 return v;
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154 }
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155
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156 public static Object assert_nil(LuanState luan,Object v) throws LuanException {
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157 if( v != null )
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158 throw luan.exception("bad argument #1 (nil expected, got "+Luan.type(v)+")");
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159 return v;
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160 }
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161
233
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162 public static int assert_integer(LuanState luan,int v) throws LuanException {
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163 return v;
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164 }
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165
290
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166 public static long assert_long(LuanState luan,long v) throws LuanException {
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167 return v;
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168 }
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169
88
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170 public static String repr(LuanState luan,Object v) throws LuanException {
130
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171 return luan.repr(v);
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172 }
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173
109
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174 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException {
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175 final double step = stepV==null ? 1.0 : stepV;
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176 if( step == 0.0 )
130
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177 throw luan.exception("bad argument #3 (step may not be zero)");
109
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178 return new LuanFunction() {
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179 double v = from;
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180
112
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181 @Override public Object call(LuanState luan,Object[] args) {
109
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182 if( step > 0.0 && v > to || step < 0.0 && v < to )
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183 return LuanFunction.NOTHING;
109
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184 double rtn = v;
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185 v += step;
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186 return rtn;
109
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187 }
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188 };
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189 }
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190
116
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191 public static LuanFunction values(final Object... args) throws LuanException {
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192 return new LuanFunction() {
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193 int i = 0;
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194
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195 @Override public Object call(LuanState luan,Object[] unused) {
128
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196 if( ++i > args.length )
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197 return LuanFunction.NOTHING;
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198 return new Object[]{i,args[i-1]};
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199 }
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200 };
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201 }
143
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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