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comparison core/src/luan/impl/FnCall.java @ 171:3dcb0f9bee82

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add core component git-svn-id: https://luan-java.googlecode.com/svn/trunk@172 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 22 Jun 2014 05:41:22 +0000
parents src/luan/impl/FnCall.java@4eaee12f6c65
children d55e873e1f0d
comparison
equal deleted inserted replaced
170:7c792a328a83 171:3dcb0f9bee82
1 package luan.impl;
2
3 import luan.Luan;
4 import luan.LuanFunction;
5 import luan.LuanException;
6 import luan.LuanSource;
7
8
9 final class FnCall extends CodeImpl implements Expressions {
10 final Expr fnExpr;
11 final Expressions args;
12 final String fnName;
13
14 FnCall(LuanSource.Element se,Expr fnExpr,Expressions args) {
15 super(se);
16 this.fnExpr = fnExpr;
17 this.args = args;
18 this.fnName = fnExpr.se().text();
19 }
20
21 @Override public Object eval(LuanStateImpl luan) throws LuanException {
22 return call( luan, fnExpr.eval(luan) );
23 }
24
25 private Object call(LuanStateImpl luan,Object o) throws LuanException {
26 if( o instanceof LuanFunction ) {
27 LuanFunction fn = (LuanFunction)o;
28 return luan.bit(se).call( fn, fnName, Luan.array(args.eval(luan)) );
29 }
30 Object h = luan.getHandler("__call",o);
31 if( h != null )
32 return call(luan,h);
33 throw luan.bit(fnExpr.se()).exception( "attempt to call '"+fnExpr.se().text()+"' (a " + Luan.type(o) + " value)" );
34 }
35
36 @Override public String toString() {
37 return "(FnCall "+fnName+" "+fnExpr+" "+args+")";
38 }
39 }