Mercurial Hosting > luan
view core/src/luan/impl/FnCall.java @ 404:d55e873e1f0d
metatables now only apply to tables
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 29 Apr 2015 07:04:40 -0600 |
parents | 3dcb0f9bee82 |
children | 8fbb961aabd5 |
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package luan.impl; import luan.Luan; import luan.LuanFunction; import luan.LuanException; import luan.LuanSource; import luan.LuanTable; final class FnCall extends CodeImpl implements Expressions { final Expr fnExpr; final Expressions args; final String fnName; FnCall(LuanSource.Element se,Expr fnExpr,Expressions args) { super(se); this.fnExpr = fnExpr; this.args = args; this.fnName = fnExpr.se().text(); } @Override public Object eval(LuanStateImpl luan) throws LuanException { return call( luan, fnExpr.eval(luan) ); } private Object call(LuanStateImpl luan,Object o) throws LuanException { if( o instanceof LuanFunction ) { LuanFunction fn = (LuanFunction)o; return luan.bit(se).call( fn, fnName, Luan.array(args.eval(luan)) ); } if( o instanceof LuanTable ) { Object h = luan.getHandler("__call",(LuanTable)o); if( h != null ) return call(luan,h); } throw luan.bit(fnExpr.se()).exception( "attempt to call '"+fnExpr.se().text()+"' (a " + Luan.type(o) + " value)" ); } @Override public String toString() { return "(FnCall "+fnName+" "+fnExpr+" "+args+")"; } }