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annotate core/src/luan/modules/BasicLuan.java @ 693:ca169567ce07

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module URIs must now include ".luan"
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 19 Apr 2016 15:54:11 -0600
parents fc08c3b42010
children b620b8e1010f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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4c0131c2b650 merge luan/lib into modules
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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.LuanMethod;
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17 import luan.LuanMeta;
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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(sourceName,text,env,allowExpr);
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33 }
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34
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35 public static LuanFunction load_file(LuanState luan,String fileName) throws LuanException {
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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 throw new LuanException("file '"+fileName+"' not found" );
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44 return load(luan,src,fileName,null,false);
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45 }
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46
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47 public static LuanFunction pairs(final LuanState 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
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52 public static LuanFunction ipairs(final LuanTable t) throws LuanException {
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53 Utils.checkNotNull(t);
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54 return new LuanFunction() {
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55 List<Object> list = t.asList();
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56 int i = 0;
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57 final int size = list.size();
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59 @Override public Object[] call(LuanState luan,Object[] args) {
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60 if( i >= size )
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61 return LuanFunction.NOTHING;
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62 Object val = list.get(i++);
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63 return new Object[]{i,val};
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64 }
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65 };
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66 }
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67
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68 public static Object get_metatable(LuanTable table) throws LuanException {
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69 Utils.checkNotNull(table);
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70 LuanTable metatable = table.getMetatable();
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71 if( metatable == null )
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72 return null;
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73 Object obj = metatable.rawGet("__metatable");
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74 return obj!=null ? obj : metatable;
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75 }
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76
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77 public static void set_metatable(LuanTable table,LuanTable metatable) throws LuanException {
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78 Utils.checkNotNull(table);
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79 if( table.getHandler("__metatable") != null )
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80 throw new LuanException("cannot change a protected metatable");
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81 table.setMetatable(metatable);
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82 }
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83
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84 public static boolean raw_equal(Object v1,Object v2) {
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85 return v1 == v2 || v1 != null && v1.equals(v2);
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86 }
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87
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88 public static Object raw_get(LuanTable table,Object index) {
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89 return table.rawGet(index);
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90 }
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91
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92 public static void raw_set(LuanTable table,Object index,Object value) {
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93 table.rawPut(index,value);
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94 }
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95
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96 public static int raw_len(Object v) throws LuanException {
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97 if( v instanceof String ) {
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98 String s = (String)v;
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99 return s.length();
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100 }
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101 if( v instanceof LuanTable ) {
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102 LuanTable t = (LuanTable)v;
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103 return t.rawLength();
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104 }
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105 throw new LuanException( "bad argument #1 to 'raw_len' (table or string expected)" );
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106 }
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108 public static String to_string(LuanState luan,Object v) throws LuanException {
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109 return luan.toString(v);
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110 }
41
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111
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112 public static LuanTable new_error(LuanState luan,Object msg) throws LuanException {
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113 String s = luan.toString(msg);
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114 LuanTable tbl = new LuanException(s).table();
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115 tbl.rawPut( "message", msg );
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116 return tbl;
41
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117 }
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118
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119 public static String assert_string(String v) throws LuanException {
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120 Utils.checkNotNull(v);
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121 return v;
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122 }
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123
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124 public static Number assert_number(Number v) throws LuanException {
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125 Utils.checkNotNull(v);
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126 return v;
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127 }
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128
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129 public static LuanTable assert_table(LuanTable v) throws LuanException {
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130 Utils.checkNotNull(v);
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131 return v;
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132 }
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133
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134 public static boolean assert_boolean(boolean 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 int assert_integer(int v) throws LuanException {
233
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139 return v;
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140 }
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141
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142 public static long assert_long(long v) throws LuanException {
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143 return v;
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144 }
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145
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146 public static double assert_double(double v) throws LuanException {
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147 return v;
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148 }
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149
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150 @LuanMethod public static byte[] assert_binary(byte[] v) throws LuanException {
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151 Utils.checkNotNull(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 LuanFunction assert_function(LuanFunction v) throws LuanException {
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156 Utils.checkNotNull(v);
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157 return v;
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158 }
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159
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160 public static LuanFunction range(final double from,final double to,Double stepV) throws LuanException {
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161 final double step = stepV==null ? 1.0 : stepV;
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162 if( step == 0.0 )
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163 throw new LuanException("bad argument #3 (step may not be zero)");
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164 return new LuanFunction() {
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165 double v = from;
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166
112
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167 @Override public Object call(LuanState luan,Object[] args) {
109
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168 if( step > 0.0 && v > to || step < 0.0 && v < to )
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169 return LuanFunction.NOTHING;
109
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170 double rtn = v;
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171 v += step;
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172 return rtn;
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173 }
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174 };
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175 }
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176
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177 public static LuanFunction values(final Object... args) throws LuanException {
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178 return new LuanFunction() {
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179 int i = 0;
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180
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181 @Override public Object call(LuanState luan,Object[] unused) {
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182 if( i >= args.length )
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183 return LuanFunction.NOTHING;
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184 return args[i++];
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185 }
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186 };
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187 }
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188
326
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189 private LuanFunction fn(Object obj) {
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190 return obj instanceof LuanFunction ? (LuanFunction)obj : null;
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191 }
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192
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193 public static Object try_(LuanState luan,LuanTable blocks,Object... args) throws LuanException {
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194 Utils.checkNotNull(blocks);
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195 Object obj = blocks.get(luan,1);
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196 if( obj == null )
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197 throw new LuanException("missing 'try' value");
326
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198 if( !(obj instanceof LuanFunction) )
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199 throw new LuanException("bad 'try' value (function expected, got "+Luan.type(obj)+")");
326
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200 LuanFunction tryFn = (LuanFunction)obj;
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201 LuanFunction catchFn = null;
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202 obj = blocks.get(luan,"catch");
326
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203 if( obj != null ) {
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204 if( !(obj instanceof LuanFunction) )
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205 throw new LuanException("bad 'catch' value (function expected, got "+Luan.type(obj)+")");
326
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206 catchFn = (LuanFunction)obj;
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207 }
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208 LuanFunction finallyFn = null;
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209 obj = blocks.get(luan,"finally");
326
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210 if( obj != null ) {
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211 if( !(obj instanceof LuanFunction) )
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212 throw new LuanException("bad 'finally' value (function expected, got "+Luan.type(obj)+")");
326
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213 finallyFn = (LuanFunction)obj;
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214 }
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215 try {
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216 return tryFn.call(luan,args);
326
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217 } catch(LuanException e) {
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218 if( catchFn == null )
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219 throw e;
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220 return catchFn.call(luan,new Object[]{e.table()});
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221 } finally {
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222 if( finallyFn != null )
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223 finallyFn.call(luan);
326
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224 }
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225 }
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226
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227 @LuanMethod public static Object[] pcall(LuanState luan,LuanFunction f,Object... args) {
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228 try {
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229 Object[] r = Luan.array(f.call(luan,args));
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230 Object[] rtn = new Object[r.length+1];
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231 rtn[0] = true;
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232 for( int i=0; i<r.length; i++ ) {
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233 rtn[i+1] = r[i];
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234 }
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235 return rtn;
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236 } catch(LuanException e) {
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5d4a78c93383 luan errors are now tables
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237 return new Object[]{false,e.table()};
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238 }
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239 }
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240
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cdc70de628b5 simplify LuanException
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241 public static String number_type(Number v) throws LuanException {
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242 Utils.checkNotNull(v);
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243 return v.getClass().getSimpleName().toLowerCase();
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244 }
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245
2
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246 }