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annotate src/luan/interp/FnCall.java @ 40:e3624b7cd603

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implement stack trace git-svn-id: https://luan-java.googlecode.com/svn/trunk@41 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 21 Dec 2012 10:45:54 +0000
parents 8a57ebfdfd78
children 64ecb7a3aad7
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.interp;
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3 import luan.Lua;
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4 import luan.LuaFunction;
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5 import luan.LuaException;
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6 import luan.LuaSource;
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9 final class FnCall extends CodeImpl implements Expressions {
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10 final Expr fnExpr;
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11 final Expressions args;
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12 final String fnName;
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14 FnCall(LuaSource.Element se,Expr fnExpr,Expressions args) {
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15 super(se);
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16 this.fnExpr = fnExpr;
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17 this.args = args;
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18 this.fnName = fnExpr.se().text();
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19 }
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21 @Override public Object[] eval(LuaStateImpl lua) throws LuaException {
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22 return call( lua, fnExpr.eval(lua) );
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23 }
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25 private Object[] call(LuaStateImpl lua,Object o) throws LuaException {
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26 if( o instanceof LuaFunction ) {
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27 LuaFunction fn = (LuaFunction)o;
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28 return lua.call( fn, se, fnName, args.eval(lua) );
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29 }
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30 Object h = lua.getHandler("__call",o);
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31 if( h != null )
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32 return call(lua,h);
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33 throw new LuaException( lua, se, "attempt to call a " + Lua.type(o) + " value" );
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34 }
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35 }