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annotate src/luan/interp/FnCall.java @ 35:e51906de0f11

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implement metatables git-svn-id: https://luan-java.googlecode.com/svn/trunk@36 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 18 Dec 2012 07:05:58 +0000
parents 5cf15507d77e
children 2a35154aec14
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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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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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8 final class FnCall implements Expressions {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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9 final Expr fnExpr;
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10 final Expressions args;
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12 FnCall(Expr fnExpr,Expressions args) {
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13 this.fnExpr = fnExpr;
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14 this.args = args;
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15 }
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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17 @Override public Object[] eval(LuaStateImpl lua) throws LuaException {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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18 return call( lua, fnExpr.eval(lua) );
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19 }
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21 private Object[] call(LuaStateImpl lua,Object o) throws LuaException {
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22 if( o instanceof LuaFunction ) {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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23 LuaFunction fn = (LuaFunction)o;
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24 return fn.call( lua, args.eval(lua) );
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parents: 31
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25 }
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26 Object h = Utils.getHandlerObject("__call",o);
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27 if( h != null )
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28 return call(lua,h);
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29 throw new LuaException( "attempt to call a " + Lua.type(o) + " value" );
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30 }
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31 }