Mercurial Hosting > luan
annotate core/src/luan/modules/BasicLuan.java @ 444:e45bcaf6f5fe
remove assert_nil
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Mon, 04 May 2015 14:59:01 -0600 |
parents | bf5e62a9090c |
children | bbad2d06f728 |
rev | line source |
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167
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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; |
413 | 19 import luan.LuanMeta; |
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20 import luan.impl.LuanCompiler; |
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21 |
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22 |
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23 public final class BasicLuan { |
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24 |
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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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28 |
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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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36 |
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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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45 |
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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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50 |
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51 public static LuanFunction pairs(final LuanState luan,final LuanTable t) throws LuanException { |
251
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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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55 |
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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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62 |
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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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75 |
48
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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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80 |
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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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84 |
48
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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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88 |
48
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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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93 |
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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 } |
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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) { |
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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 { |
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111 return luan.toString(v); |
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112 } |
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113 |
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114 public static void error(LuanState luan,Object msg) throws LuanException { |
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115 throw luan.exception(msg); |
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116 } |
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117 |
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118 public static String assert_string(LuanState luan,String v) throws LuanException { |
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119 Utils.checkNotNull(luan,v); |
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120 return v; |
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121 } |
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122 |
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123 public static Number assert_number(LuanState luan,Number v) throws LuanException { |
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124 Utils.checkNotNull(luan,v); |
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125 return v; |
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126 } |
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127 |
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128 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException { |
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129 Utils.checkNotNull(luan,v); |
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130 return v; |
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131 } |
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132 |
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133 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException { |
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134 return v; |
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135 } |
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136 |
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137 public static int assert_integer(LuanState luan,int v) throws LuanException { |
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138 return v; |
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139 } |
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140 |
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141 public static long assert_long(LuanState luan,long v) throws LuanException { |
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142 return v; |
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143 } |
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144 |
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145 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException { |
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146 final double step = stepV==null ? 1.0 : stepV; |
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147 if( step == 0.0 ) |
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148 throw luan.exception("bad argument #3 (step may not be zero)"); |
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149 return new LuanFunction() { |
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150 double v = from; |
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151 |
112
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152 @Override public Object call(LuanState luan,Object[] args) { |
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153 if( step > 0.0 && v > to || step < 0.0 && v < to ) |
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154 return LuanFunction.NOTHING; |
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155 double rtn = v; |
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156 v += step; |
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157 return rtn; |
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158 } |
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159 }; |
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160 } |
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161 |
116
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162 public static LuanFunction values(final Object... args) throws LuanException { |
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163 return new LuanFunction() { |
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164 int i = 0; |
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165 |
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166 @Override public Object call(LuanState luan,Object[] unused) { |
402 | 167 if( i >= args.length ) |
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168 return LuanFunction.NOTHING; |
402 | 169 return args[i++]; |
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170 } |
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171 }; |
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172 } |
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173 |
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174 private LuanFunction fn(Object obj) { |
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175 return obj instanceof LuanFunction ? (LuanFunction)obj : null; |
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176 } |
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177 |
422 | 178 public static Object try_(LuanState luan,LuanTable blocks) throws LuanException { |
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179 Utils.checkNotNull(luan,blocks); |
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180 Object obj = blocks.get(luan,1); |
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181 if( obj == null ) |
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182 throw luan.exception("missing 'try' value"); |
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183 if( !(obj instanceof LuanFunction) ) |
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184 throw luan.exception("bad 'try' value (function expected, got "+Luan.type(obj)+")"); |
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185 LuanFunction tryFn = (LuanFunction)obj; |
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186 LuanFunction catchFn = null; |
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187 obj = blocks.get(luan,"catch"); |
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188 if( obj != null ) { |
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189 if( !(obj instanceof LuanFunction) ) |
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190 throw luan.exception("bad 'catch' value (function expected, got "+Luan.type(obj)+")"); |
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191 catchFn = (LuanFunction)obj; |
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192 } |
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193 LuanFunction finallyFn = null; |
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194 obj = blocks.get(luan,"finally"); |
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195 if( obj != null ) { |
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196 if( !(obj instanceof LuanFunction) ) |
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197 throw luan.exception("bad 'finally' value (function expected, got "+Luan.type(obj)+")"); |
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198 finallyFn = (LuanFunction)obj; |
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199 } |
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200 try { |
422 | 201 return luan.call(tryFn); |
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202 } catch(LuanException e) { |
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203 if( catchFn == null ) |
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204 throw e; |
422 | 205 return luan.call(catchFn,new Object[]{e}); |
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206 } finally { |
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207 if( finallyFn != null ) |
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208 luan.call(finallyFn); |
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209 } |
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210 } |
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211 |
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212 @LuanMethod public static Object[] pcall(LuanState luan,LuanFunction f,Object... args) { |
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213 try { |
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214 Object[] r = Luan.array(luan.call(f,args)); |
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215 Object[] rtn = new Object[r.length+1]; |
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216 rtn[0] = true; |
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217 for( int i=0; i<r.length; i++ ) { |
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218 rtn[i+1] = r[i]; |
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219 } |
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220 return rtn; |
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221 } catch(LuanException e) { |
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222 return new Object[]{false,e}; |
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223 } |
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224 } |
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225 |
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226 } |