Mercurial Hosting > luan
annotate core/src/luan/modules/BasicLuan.java @ 427:dae264ad6a7b
fix LuanTable.put() to use metatables
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Fri, 01 May 2015 19:29:07 -0600 |
parents | 23a93c118042 |
children | d9df6d6cb927 |
rev | line source |
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167
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merge luan/lib into modules
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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(LuanState luan,final LuanTable t) throws LuanException { |
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52 Utils.checkNotNull(luan,t); |
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53 Object obj = t.getHandler("__pairs"); |
413 | 54 if( obj != null ) { |
55 if( obj instanceof LuanFunction ) { | |
56 obj = Luan.first(luan.call((LuanFunction)obj,"__pairs",new Object[]{t})); | |
57 if( !(obj instanceof LuanFunction) ) | |
58 throw luan.exception( "metamethod __pairs should return function but returned " + Luan.type(obj) ); | |
59 return (LuanFunction)obj; | |
60 } | |
61 if( obj instanceof LuanMeta ) { | |
62 LuanMeta meta = (LuanMeta)obj; | |
63 return meta.__pairs(luan,t); | |
64 } | |
65 throw luan.exception( "invalid type of metamethod __pairs: " + Luan.type(obj) ); | |
66 } | |
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67 return new LuanFunction() { |
413 | 68 final Iterator<Map.Entry<Object,Object>> iter = t.iterator(); |
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69 |
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70 @Override public Object[] call(LuanState luan,Object[] args) { |
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71 if( !iter.hasNext() ) |
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72 return LuanFunction.NOTHING; |
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73 Map.Entry<Object,Object> entry = iter.next(); |
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74 return new Object[]{entry.getKey(),entry.getValue()}; |
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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 LuanFunction ipairs(LuanState luan,final LuanTable t) throws LuanException { |
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80 Utils.checkNotNull(luan,t); |
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81 return new LuanFunction() { |
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82 List<Object> list = t.asList(); |
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83 int i = 0; |
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84 final int size = list.size(); |
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85 |
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86 @Override public Object[] call(LuanState luan,Object[] args) { |
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87 if( i >= size ) |
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88 return LuanFunction.NOTHING; |
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89 Object val = list.get(i++); |
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90 return new Object[]{i,val}; |
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91 } |
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92 }; |
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93 } |
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94 |
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95 public static LuanTable get_metatable(LuanTable table) { |
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96 return table.getMetatable(); |
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97 } |
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98 |
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99 public static LuanTable set_metatable(LuanTable table,LuanTable metatable) { |
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100 table.setMetatable(metatable); |
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101 return table; |
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102 } |
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103 |
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104 public static boolean raw_equal(Object v1,Object v2) { |
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105 return v1 == v2 || v1 != null && v1.equals(v2); |
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106 } |
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107 |
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108 public static Object raw_get(LuanTable table,Object index) { |
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109 return table.rawGet(index); |
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110 } |
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111 |
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112 public static LuanTable raw_set(LuanTable table,Object index,Object value) { |
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113 table.rawPut(index,value); |
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114 return table; |
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115 } |
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116 |
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117 public static int raw_len(LuanState luan,Object v) throws LuanException { |
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118 if( v instanceof String ) { |
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119 String s = (String)v; |
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120 return s.length(); |
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121 } |
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122 if( v instanceof LuanTable ) { |
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123 LuanTable t = (LuanTable)v; |
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124 return t.length(); |
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125 } |
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126 throw luan.exception( "bad argument #1 to 'raw_len' (table or string expected)" ); |
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127 } |
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128 |
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129 public static Number to_number(Object e,Integer base) { |
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130 return Luan.toNumber(e,base); |
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131 } |
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132 |
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133 public static String to_string(LuanState luan,Object v) throws LuanException { |
130
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134 return luan.toString(v); |
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135 } |
41
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136 |
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137 public static boolean to_boolean(Object v) throws LuanException { |
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138 return Luan.toBoolean(v); |
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139 } |
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140 |
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141 public static void error(LuanState luan,Object msg) throws LuanException { |
130
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142 throw luan.exception(msg); |
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143 } |
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144 |
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145 public static Object assert_(LuanState luan,Object v,String msg) throws LuanException { |
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146 if( Luan.toBoolean(v) ) |
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147 return v; |
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148 if( msg == null ) |
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149 msg = "assertion failed!"; |
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150 throw luan.exception( msg ); |
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151 } |
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152 |
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153 public static String assert_string(LuanState luan,String v) throws LuanException { |
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154 Utils.checkNotNull(luan,v); |
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155 return v; |
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156 } |
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157 |
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158 public static Number assert_number(LuanState luan,Number v) throws LuanException { |
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159 Utils.checkNotNull(luan,v); |
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160 return v; |
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161 } |
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162 |
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163 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException { |
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164 Utils.checkNotNull(luan,v); |
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165 return v; |
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166 } |
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167 |
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168 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException { |
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169 return v; |
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170 } |
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171 |
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172 public static Object assert_nil(LuanState luan,Object v) throws LuanException { |
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173 if( v != null ) |
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174 throw luan.exception("bad argument #1 (nil expected, got "+Luan.type(v)+")"); |
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175 return v; |
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176 } |
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177 |
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178 public static int assert_integer(LuanState luan,int v) throws LuanException { |
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179 return v; |
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180 } |
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181 |
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182 public static long assert_long(LuanState luan,long v) throws LuanException { |
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183 return v; |
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184 } |
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185 |
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186 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException { |
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187 final double step = stepV==null ? 1.0 : stepV; |
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188 if( step == 0.0 ) |
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189 throw luan.exception("bad argument #3 (step may not be zero)"); |
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190 return new LuanFunction() { |
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191 double v = from; |
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192 |
112
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193 @Override public Object call(LuanState luan,Object[] args) { |
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194 if( step > 0.0 && v > to || step < 0.0 && v < to ) |
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195 return LuanFunction.NOTHING; |
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196 double rtn = v; |
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197 v += step; |
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198 return rtn; |
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199 } |
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200 }; |
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201 } |
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202 |
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203 public static LuanFunction values(final Object... args) throws LuanException { |
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204 return new LuanFunction() { |
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205 int i = 0; |
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206 |
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207 @Override public Object call(LuanState luan,Object[] unused) { |
402 | 208 if( i >= args.length ) |
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209 return LuanFunction.NOTHING; |
402 | 210 return args[i++]; |
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211 } |
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212 }; |
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213 } |
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214 |
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215 private LuanFunction fn(Object obj) { |
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216 return obj instanceof LuanFunction ? (LuanFunction)obj : null; |
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217 } |
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218 |
422 | 219 public static Object try_(LuanState luan,LuanTable blocks) throws LuanException { |
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220 Utils.checkNotNull(luan,blocks); |
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221 Object obj = blocks.get(luan,1); |
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222 if( obj == null ) |
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223 throw luan.exception("missing 'try' value"); |
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224 if( !(obj instanceof LuanFunction) ) |
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225 throw luan.exception("bad 'try' value (function expected, got "+Luan.type(obj)+")"); |
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226 LuanFunction tryFn = (LuanFunction)obj; |
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227 LuanFunction catchFn = null; |
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228 obj = blocks.get(luan,"catch"); |
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229 if( obj != null ) { |
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230 if( !(obj instanceof LuanFunction) ) |
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231 throw luan.exception("bad 'catch' value (function expected, got "+Luan.type(obj)+")"); |
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232 catchFn = (LuanFunction)obj; |
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233 } |
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234 LuanFunction finallyFn = null; |
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235 obj = blocks.get(luan,"finally"); |
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236 if( obj != null ) { |
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237 if( !(obj instanceof LuanFunction) ) |
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238 throw luan.exception("bad 'finally' value (function expected, got "+Luan.type(obj)+")"); |
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239 finallyFn = (LuanFunction)obj; |
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240 } |
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241 try { |
422 | 242 return luan.call(tryFn); |
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243 } catch(LuanException e) { |
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244 if( catchFn == null ) |
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245 throw e; |
422 | 246 return luan.call(catchFn,new Object[]{e}); |
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247 } finally { |
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248 if( finallyFn != null ) |
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249 luan.call(finallyFn); |
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250 } |
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251 } |
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252 |
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253 @LuanMethod public static Object[] pcall(LuanState luan,LuanFunction f,Object... args) { |
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254 try { |
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255 Object[] r = Luan.array(luan.call(f,args)); |
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256 Object[] rtn = new Object[r.length+1]; |
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257 rtn[0] = true; |
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258 for( int i=0; i<r.length; i++ ) { |
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259 rtn[i+1] = r[i]; |
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260 } |
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261 return rtn; |
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262 } catch(LuanException e) { |
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263 return new Object[]{false,e}; |
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264 } |
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265 } |
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266 |
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267 } |