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comparison src/luan/interp/UnmExpr.java @ 48:64ecb7a3aad7

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rename Lua to Luan git-svn-id: https://luan-java.googlecode.com/svn/trunk@49 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 28 Dec 2012 03:29:12 +0000
parents a443637829c1
children 8ede219cd111
comparison
equal deleted inserted replaced
47:659c7139e903 48:64ecb7a3aad7
1 package luan.interp; 1 package luan.interp;
2 2
3 import luan.Lua; 3 import luan.Luan;
4 import luan.LuaFunction; 4 import luan.LuanFunction;
5 import luan.LuaException; 5 import luan.LuanException;
6 import luan.LuaSource; 6 import luan.LuanSource;
7 7
8 8
9 // unary minus 9 // unary minus
10 final class UnmExpr extends UnaryOpExpr { 10 final class UnmExpr extends UnaryOpExpr {
11 11
12 UnmExpr(LuaSource.Element se,Expr op) { 12 UnmExpr(LuanSource.Element se,Expr op) {
13 super(se,op); 13 super(se,op);
14 } 14 }
15 15
16 @Override public Object eval(LuaStateImpl lua) throws LuaException { 16 @Override public Object eval(LuanStateImpl lua) throws LuanException {
17 Object o = op.eval(lua); 17 Object o = op.eval(lua);
18 Number n = Lua.toNumber(o); 18 Number n = Luan.toNumber(o);
19 if( n != null ) 19 if( n != null )
20 return -n.doubleValue(); 20 return -n.doubleValue();
21 LuaFunction fn = lua.getHandlerFunction(se,"__unm",o); 21 LuanFunction fn = lua.getHandlerFunction(se,"__unm",o);
22 if( fn != null ) { 22 if( fn != null ) {
23 return Lua.first(lua.call(fn,se,"__unm",o)); 23 return Luan.first(lua.call(fn,se,"__unm",o));
24 } 24 }
25 throw new LuaException(lua,se,"attempt to perform arithmetic on a "+Lua.type(o)+" value"); 25 throw new LuanException(lua,se,"attempt to perform arithmetic on a "+Luan.type(o)+" value");
26 } 26 }
27 } 27 }