Mercurial Hosting > luan
view core/src/luan/impl/FnCall.java @ 601:d36027b41570 0.12
better error message
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 29 Sep 2015 01:34:20 -0600 |
parents | 60c549d43988 |
children | 859c0dedc8b6 |
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package luan.impl; import luan.Luan; import luan.LuanFunction; import luan.LuanException; import luan.LuanElement; import luan.LuanTable; final class FnCall extends CodeImpl implements Expressions { final Expr fnExpr; final Expressions args; final String fnName; FnCall(LuanElement el,Expr fnExpr,Expressions args) { super(el); this.fnExpr = fnExpr; this.args = args; this.fnName = fnExpr.el().text(); } @Override public Object eval(LuanStateImpl luan) throws LuanException { return call( luan, fnExpr.eval(luan), Luan.array(args.eval(luan)) ); } private Object call(LuanStateImpl luan,Object o,Object[] argVals) throws LuanException { luan.push(el,fnName); try { if( o instanceof LuanFunction ) { LuanFunction fn = (LuanFunction)o; return fn.call( luan, argVals ); } if( o instanceof LuanTable ) { LuanTable t = (LuanTable)o; Object h = t.getHandler("__call"); if( h != null ) return call(luan,h,argVals); } throw new LuanException(luan, "attempt to call '"+fnName+"' (a " + Luan.type(o) + " value)" ); } finally { luan.pop(); } } @Override public String toString() { return "(FnCall "+fnName+" "+fnExpr+" "+args+")"; } }