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comparison src/luan/Luan.java @ 1166:7ef40e1923b7

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add back Thread.global allow metatables to have metatables
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 08 Feb 2018 02:22:51 -0700
parents 1f9d34a6f308
children ce3279ef1bd9
comparison
equal deleted inserted replaced
1165:668f29bc52ea 1166:7ef40e1923b7
112 if( obj instanceof LuanFunction ) 112 if( obj instanceof LuanFunction )
113 return (LuanFunction)obj; 113 return (LuanFunction)obj;
114 throw new LuanException("attempt to call a " + Luan.type(obj) + " value" ); 114 throw new LuanException("attempt to call a " + Luan.type(obj) + " value" );
115 } 115 }
116 116
117 public static boolean isLessThan(LuanState luan,Object o1,Object o2) throws LuanException {
118 if( o1 instanceof Number && o2 instanceof Number ) {
119 Number n1 = (Number)o1;
120 Number n2 = (Number)o2;
121 return n1.doubleValue() < n2.doubleValue();
122 }
123 if( o1 instanceof String && o2 instanceof String ) {
124 String s1 = (String)o1;
125 String s2 = (String)o2;
126 return s1.compareTo(s2) < 0;
127 }
128 LuanFunction fn = getBinHandler("__lt",o1,o2);
129 if( fn != null )
130 return checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) );
131 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) );
132 }
133
134 public static LuanFunction getBinHandler(String op,Object o1,Object o2) throws LuanException {
135 if( o1 instanceof LuanTable ) {
136 LuanFunction f1 = getHandlerFunction(op,(LuanTable)o1);
137 if( f1 != null )
138 return f1;
139 }
140 return o2 instanceof LuanTable ? getHandlerFunction(op,(LuanTable)o2) : null;
141 }
142
143 public static LuanFunction getHandlerFunction(String op,LuanTable t) throws LuanException {
144 Object f = t.getHandler(op);
145 if( f == null )
146 return null;
147 return checkFunction(f);
148 }
149
150 public static LuanFunction load(String text,String sourceName,LuanTable env) 117 public static LuanFunction load(String text,String sourceName,LuanTable env)
151 throws LuanException 118 throws LuanException
152 { 119 {
153 return LuanCompiler.compile(text,sourceName,env); 120 return LuanCompiler.compile(text,sourceName,env);
154 } 121 }