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annotate core/src/luan/modules/BasicLuan.java @ 432:d9df6d6cb927

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finish fixing LuanTable to use metatables
author Franklin Schmidt <fschmidt@gmail.com>
date Sat, 02 May 2015 23:41:59 -0600
parents dae264ad6a7b
children 75ccb4da803f
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1 package luan.modules;
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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.LuanMethod;
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19 import luan.LuanMeta;
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20 import luan.impl.LuanCompiler;
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23 public final class BasicLuan {
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25 public static String type(Object obj) {
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26 return Luan.type(obj);
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27 }
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29 public static LuanFunction load(LuanState luan,String text,String sourceName,LuanTable env,Boolean allowExpr)
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30 throws LuanException
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31 {
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32 if( allowExpr==null )
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33 allowExpr = false;
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34 return LuanCompiler.compile(luan,new LuanSource(sourceName,text),env,allowExpr);
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35 }
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37 public static LuanFunction load_file(LuanState luan,String fileName,LuanTable env) throws LuanException {
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38 if( fileName == null )
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39 fileName = "stdin:";
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40 String src = PackageLuan.read(luan,fileName);
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41 if( src == null )
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42 throw luan.exception( "file '"+fileName+"' not found" );
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43 return load(luan,src,fileName,env,false);
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44 }
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46 public static Object do_file(LuanState luan,String fileName) throws LuanException {
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47 LuanFunction fn = load_file(luan,fileName,null);
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48 return luan.call(fn);
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49 }
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51 public static LuanFunction pairs(final LuanState luan,final LuanTable t) throws LuanException {
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52 Utils.checkNotNull(luan,t);
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53 return t.pairs(luan);
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54 }
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56 public static LuanFunction ipairs(LuanState luan,final LuanTable t) throws LuanException {
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57 Utils.checkNotNull(luan,t);
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58 return new LuanFunction() {
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59 List<Object> list = t.asList();
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60 int i = 0;
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61 final int size = list.size();
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63 @Override public Object[] call(LuanState luan,Object[] args) {
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64 if( i >= size )
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65 return LuanFunction.NOTHING;
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66 Object val = list.get(i++);
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67 return new Object[]{i,val};
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68 }
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69 };
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70 }
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71
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72 public static LuanTable get_metatable(LuanTable table) {
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73 return table.getMetatable();
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74 }
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76 public static LuanTable set_metatable(LuanTable table,LuanTable metatable) {
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77 table.setMetatable(metatable);
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78 return table;
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79 }
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81 public static boolean raw_equal(Object v1,Object v2) {
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82 return v1 == v2 || v1 != null && v1.equals(v2);
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83 }
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85 public static Object raw_get(LuanTable table,Object index) {
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86 return table.rawGet(index);
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87 }
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89 public static LuanTable raw_set(LuanTable table,Object index,Object value) {
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90 table.rawPut(index,value);
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91 return table;
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92 }
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94 public static int raw_len(LuanState luan,Object v) throws LuanException {
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95 if( v instanceof String ) {
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96 String s = (String)v;
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97 return s.length();
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98 }
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99 if( v instanceof LuanTable ) {
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100 LuanTable t = (LuanTable)v;
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101 return t.rawLength();
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102 }
130
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103 throw luan.exception( "bad argument #1 to 'raw_len' (table or string expected)" );
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104 }
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105
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106 public static Number to_number(Object e,Integer base) {
48
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107 return Luan.toNumber(e,base);
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108 }
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109
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110 public static String to_string(LuanState luan,Object v) throws LuanException {
130
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111 return luan.toString(v);
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112 }
41
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113
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114 public static boolean to_boolean(Object v) throws LuanException {
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115 return Luan.toBoolean(v);
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116 }
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117
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118 public static void error(LuanState luan,Object msg) throws LuanException {
130
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119 throw luan.exception(msg);
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120 }
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121
64
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122 public static Object assert_(LuanState luan,Object v,String msg) throws LuanException {
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123 if( Luan.toBoolean(v) )
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124 return v;
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125 if( msg == null )
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126 msg = "assertion failed!";
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127 throw luan.exception( msg );
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128 }
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129
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130 public static String assert_string(LuanState luan,String v) throws LuanException {
251
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131 Utils.checkNotNull(luan,v);
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132 return v;
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133 }
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134
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135 public static Number assert_number(LuanState luan,Number v) throws LuanException {
251
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136 Utils.checkNotNull(luan,v);
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137 return v;
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138 }
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139
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140 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException {
251
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141 Utils.checkNotNull(luan,v);
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142 return v;
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143 }
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144
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145 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException {
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146 return v;
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147 }
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148
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149 public static Object assert_nil(LuanState luan,Object v) throws LuanException {
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150 if( v != null )
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151 throw luan.exception("bad argument #1 (nil expected, got "+Luan.type(v)+")");
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152 return v;
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153 }
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154
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155 public static int assert_integer(LuanState luan,int v) throws LuanException {
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156 return v;
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157 }
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158
290
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159 public static long assert_long(LuanState luan,long v) throws LuanException {
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160 return v;
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161 }
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162
109
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163 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException {
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164 final double step = stepV==null ? 1.0 : stepV;
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165 if( step == 0.0 )
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166 throw luan.exception("bad argument #3 (step may not be zero)");
109
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167 return new LuanFunction() {
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168 double v = from;
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169
112
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170 @Override public Object call(LuanState luan,Object[] args) {
109
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171 if( step > 0.0 && v > to || step < 0.0 && v < to )
123
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172 return LuanFunction.NOTHING;
109
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173 double rtn = v;
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174 v += step;
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175 return rtn;
109
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176 }
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177 };
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178 }
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179
116
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180 public static LuanFunction values(final Object... args) throws LuanException {
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181 return new LuanFunction() {
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182 int i = 0;
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183
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184 @Override public Object call(LuanState luan,Object[] unused) {
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185 if( i >= args.length )
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186 return LuanFunction.NOTHING;
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187 return args[i++];
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188 }
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189 };
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190 }
143
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191
326
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192 private LuanFunction fn(Object obj) {
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193 return obj instanceof LuanFunction ? (LuanFunction)obj : null;
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194 }
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195
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196 public static Object try_(LuanState luan,LuanTable blocks) throws LuanException {
326
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197 Utils.checkNotNull(luan,blocks);
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198 Object obj = blocks.get(luan,1);
326
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199 if( obj == null )
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200 throw luan.exception("missing 'try' value");
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201 if( !(obj instanceof LuanFunction) )
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202 throw luan.exception("bad 'try' value (function expected, got "+Luan.type(obj)+")");
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203 LuanFunction tryFn = (LuanFunction)obj;
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204 LuanFunction catchFn = null;
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205 obj = blocks.get(luan,"catch");
326
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206 if( obj != null ) {
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207 if( !(obj instanceof LuanFunction) )
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208 throw luan.exception("bad 'catch' value (function expected, got "+Luan.type(obj)+")");
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209 catchFn = (LuanFunction)obj;
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210 }
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211 LuanFunction finallyFn = null;
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212 obj = blocks.get(luan,"finally");
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213 if( obj != null ) {
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214 if( !(obj instanceof LuanFunction) )
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215 throw luan.exception("bad 'finally' value (function expected, got "+Luan.type(obj)+")");
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216 finallyFn = (LuanFunction)obj;
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217 }
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218 try {
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219 return luan.call(tryFn);
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220 } catch(LuanException e) {
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221 if( catchFn == null )
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222 throw e;
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223 return luan.call(catchFn,new Object[]{e});
326
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224 } finally {
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225 if( finallyFn != null )
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226 luan.call(finallyFn);
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227 }
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228 }
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229
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230 @LuanMethod public static Object[] pcall(LuanState luan,LuanFunction f,Object... args) {
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231 try {
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232 Object[] r = Luan.array(luan.call(f,args));
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233 Object[] rtn = new Object[r.length+1];
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234 rtn[0] = true;
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235 for( int i=0; i<r.length; i++ ) {
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236 rtn[i+1] = r[i];
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237 }
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238 return rtn;
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239 } catch(LuanException e) {
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240 return new Object[]{false,e};
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241 }
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242 }
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243
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244 }