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annotate core/src/luan/modules/BasicLuan.java @ 517:8dcf9e12446b

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add Luan.on_luan_close()
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 27 May 2015 01:20:49 -0600
parents d3183a330ff5
children 8a217fe5b4f3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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diff changeset
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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36
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37 public static LuanFunction load_file(LuanState luan,String fileName,Boolean addExtension) 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,addExtension);
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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,null,false);
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44 }
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45
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46 public static LuanFunction pairs(final LuanState luan,final LuanTable t) throws LuanException {
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47 Utils.checkNotNull(luan,t);
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48 return t.pairs(luan);
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49 }
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51 public static LuanFunction ipairs(LuanState luan,final LuanTable t) throws LuanException {
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52 Utils.checkNotNull(luan,t);
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53 return new LuanFunction() {
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54 List<Object> list = t.asList();
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55 int i = 0;
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56 final int size = list.size();
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58 @Override public Object[] call(LuanState luan,Object[] args) {
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59 if( i >= size )
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60 return LuanFunction.NOTHING;
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61 Object val = list.get(i++);
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62 return new Object[]{i,val};
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63 }
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64 };
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65 }
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66
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67 public static Object get_metatable(LuanState luan,LuanTable table) throws LuanException {
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68 Utils.checkNotNull(luan,table);
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69 LuanTable metatable = table.getMetatable();
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70 if( metatable == null )
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71 return null;
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72 Object obj = metatable.rawGet("__metatable");
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73 return obj!=null ? obj : metatable;
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74 }
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75
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76 public static void set_metatable(LuanState luan,LuanTable table,LuanTable metatable) throws LuanException {
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77 Utils.checkNotNull(luan,table);
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78 if( table.getHandler("__metatable") != null )
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79 throw luan.exception("cannot change a protected metatable");
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80 table.setMetatable(metatable);
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81 }
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82
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83 public static boolean raw_equal(Object v1,Object v2) {
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84 return v1 == v2 || v1 != null && v1.equals(v2);
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85 }
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86
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87 public static Object raw_get(LuanTable table,Object index) {
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88 return table.rawGet(index);
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89 }
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90
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91 public static void raw_set(LuanTable table,Object index,Object value) {
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92 table.rawPut(index,value);
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93 }
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95 public static int raw_len(LuanState luan,Object v) throws LuanException {
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96 if( v instanceof String ) {
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97 String s = (String)v;
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98 return s.length();
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99 }
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100 if( v instanceof LuanTable ) {
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101 LuanTable t = (LuanTable)v;
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102 return t.rawLength();
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103 }
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104 throw luan.exception( "bad argument #1 to 'raw_len' (table or string expected)" );
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105 }
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106
49
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107 public static String to_string(LuanState luan,Object v) throws LuanException {
130
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108 return luan.toString(v);
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109 }
41
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110
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111 public static LuanTable new_error(LuanState luan,Object msg) throws LuanException {
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112 return luan.exception(msg).table();
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113 }
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114
64
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115 public static String assert_string(LuanState luan,String v) throws LuanException {
251
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116 Utils.checkNotNull(luan,v);
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117 return v;
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118 }
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119
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120 public static Number assert_number(LuanState luan,Number v) throws LuanException {
251
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121 Utils.checkNotNull(luan,v);
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122 return v;
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123 }
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124
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125 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException {
251
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126 Utils.checkNotNull(luan,v);
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127 return v;
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128 }
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129
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130 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException {
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131 return v;
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132 }
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133
233
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134 public static int assert_integer(LuanState luan,int v) throws LuanException {
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135 return v;
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136 }
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137
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138 public static long assert_long(LuanState luan,long v) throws LuanException {
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139 return v;
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140 }
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141
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142 @LuanMethod public static byte[] assert_binary(LuanState luan,byte[] v) throws LuanException {
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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
109
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147 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException {
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148 final double step = stepV==null ? 1.0 : stepV;
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149 if( step == 0.0 )
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150 throw luan.exception("bad argument #3 (step may not be zero)");
109
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151 return new LuanFunction() {
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152 double v = from;
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153
112
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154 @Override public Object call(LuanState luan,Object[] args) {
109
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155 if( step > 0.0 && v > to || step < 0.0 && v < to )
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156 return LuanFunction.NOTHING;
109
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157 double rtn = v;
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158 v += step;
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159 return rtn;
109
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160 }
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161 };
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162 }
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163
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164 public static LuanFunction values(final Object... args) throws LuanException {
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165 return new LuanFunction() {
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166 int i = 0;
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167
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168 @Override public Object call(LuanState luan,Object[] unused) {
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169 if( i >= args.length )
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170 return LuanFunction.NOTHING;
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171 return args[i++];
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172 }
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173 };
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174 }
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175
326
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176 private LuanFunction fn(Object obj) {
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177 return obj instanceof LuanFunction ? (LuanFunction)obj : null;
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178 }
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179
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180 public static Object try_(LuanState luan,LuanTable blocks) throws LuanException {
326
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181 Utils.checkNotNull(luan,blocks);
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182 Object obj = blocks.get(luan,1);
326
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183 if( obj == null )
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184 throw luan.exception("missing 'try' value");
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185 if( !(obj instanceof LuanFunction) )
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186 throw luan.exception("bad 'try' value (function expected, got "+Luan.type(obj)+")");
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187 LuanFunction tryFn = (LuanFunction)obj;
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188 LuanFunction catchFn = null;
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189 obj = blocks.get(luan,"catch");
326
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190 if( obj != null ) {
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191 if( !(obj instanceof LuanFunction) )
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192 throw luan.exception("bad 'catch' value (function expected, got "+Luan.type(obj)+")");
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193 catchFn = (LuanFunction)obj;
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194 }
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195 LuanFunction finallyFn = null;
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196 obj = blocks.get(luan,"finally");
326
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197 if( obj != null ) {
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198 if( !(obj instanceof LuanFunction) )
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199 throw luan.exception("bad 'finally' value (function expected, got "+Luan.type(obj)+")");
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200 finallyFn = (LuanFunction)obj;
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201 }
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202 try {
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203 return luan.call(tryFn);
326
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204 } catch(LuanException e) {
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205 if( catchFn == null )
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206 throw e;
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207 return luan.call(catchFn,new Object[]{e.table()});
326
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208 } finally {
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209 if( finallyFn != null )
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210 luan.call(finallyFn);
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211 }
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212 }
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213
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214 @LuanMethod public static Object[] pcall(LuanState luan,LuanFunction f,Object... args) {
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215 try {
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216 Object[] r = Luan.array(luan.call(f,args));
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217 Object[] rtn = new Object[r.length+1];
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218 rtn[0] = true;
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219 for( int i=0; i<r.length; i++ ) {
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220 rtn[i+1] = r[i];
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221 }
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222 return rtn;
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223 } catch(LuanException e) {
481
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224 return new Object[]{false,e.table()};
326
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225 }
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226 }
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227
517
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228 public static void on_luan_close(LuanState luan,LuanFunction fn) {
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229 luan.onClose(fn);
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230 }
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231
2
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232 }