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annotate core/src/luan/impl/FnCall.java @ 372:f08cefa4594c

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author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 17 Apr 2015 07:58:20 -0600
parents 3dcb0f9bee82
children d55e873e1f0d
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1 package luan.impl;
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3 import luan.Luan;
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4 import luan.LuanFunction;
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5 import luan.LuanException;
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6 import luan.LuanSource;
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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(LuanSource.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(LuanStateImpl luan) throws LuanException {
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22 return call( luan, fnExpr.eval(luan) );
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23 }
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25 private Object call(LuanStateImpl luan,Object o) throws LuanException {
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26 if( o instanceof LuanFunction ) {
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27 LuanFunction fn = (LuanFunction)o;
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28 return luan.bit(se).call( fn, fnName, Luan.array(args.eval(luan)) );
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29 }
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30 Object h = luan.getHandler("__call",o);
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31 if( h != null )
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32 return call(luan,h);
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33 throw luan.bit(fnExpr.se()).exception( "attempt to call '"+fnExpr.se().text()+"' (a " + Luan.type(o) + " value)" );
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34 }
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36 @Override public String toString() {
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37 return "(FnCall "+fnName+" "+fnExpr+" "+args+")";
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38 }
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39 }