677 lines
18 KiB
Haxe
677 lines
18 KiB
Haxe
/*
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* Copyright (C)2008-2017 Haxe Foundation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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package hscript;
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import haxe.PosInfos;
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import hscript.Expr;
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private enum Stop {
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SBreak;
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SContinue;
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SReturn( v : Dynamic );
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}
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class Interp {
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#if haxe3
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public var variables : Map<String,Dynamic>;
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var locals : Map<String,{ r : Dynamic }>;
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var binops : Map<String, Expr -> Expr -> Dynamic >;
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#else
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public var variables : Hash<Dynamic>;
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var locals : Hash<{ r : Dynamic }>;
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var binops : Hash< Expr -> Expr -> Dynamic >;
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#end
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var depth : Int;
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var inTry : Bool;
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var declared : Array<{ n : String, old : { r : Dynamic } }>;
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#if hscriptPos
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var curExpr : Expr;
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#end
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public function new() {
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#if haxe3
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variables = new Map<String,Dynamic>();
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locals = new Map();
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#else
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variables = new Hash();
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locals = new Hash();
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#end
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declared = new Array();
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variables.set("null",null);
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variables.set("true",true);
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variables.set("false",false);
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variables.set("trace",function(e) haxe.Log.trace(Std.string(e), posInfos()));
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initOps();
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}
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public function posInfos(): PosInfos {
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#if hscriptPos
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if (curExpr != null)
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return cast { fileName : curExpr.origin, lineNumber : curExpr.line };
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#end
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return cast { fileName : "hscript", lineNumber : 0 };
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}
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function initOps() {
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var me = this;
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#if haxe3
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binops = new Map();
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#else
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binops = new Hash();
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#end
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binops.set("+",function(e1,e2) return me.expr(e1) + me.expr(e2));
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binops.set("-",function(e1,e2) return me.expr(e1) - me.expr(e2));
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binops.set("*",function(e1,e2) return me.expr(e1) * me.expr(e2));
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binops.set("/",function(e1,e2) return me.expr(e1) / me.expr(e2));
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binops.set("%",function(e1,e2) return me.expr(e1) % me.expr(e2));
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binops.set("&",function(e1,e2) return me.expr(e1) & me.expr(e2));
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binops.set("|",function(e1,e2) return me.expr(e1) | me.expr(e2));
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binops.set("^",function(e1,e2) return me.expr(e1) ^ me.expr(e2));
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binops.set("<<",function(e1,e2) return me.expr(e1) << me.expr(e2));
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binops.set(">>",function(e1,e2) return me.expr(e1) >> me.expr(e2));
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binops.set(">>>",function(e1,e2) return me.expr(e1) >>> me.expr(e2));
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binops.set("==",function(e1,e2) return me.expr(e1) == me.expr(e2));
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binops.set("!=",function(e1,e2) return me.expr(e1) != me.expr(e2));
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binops.set(">=",function(e1,e2) return me.expr(e1) >= me.expr(e2));
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binops.set("<=",function(e1,e2) return me.expr(e1) <= me.expr(e2));
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binops.set(">",function(e1,e2) return me.expr(e1) > me.expr(e2));
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binops.set("<",function(e1,e2) return me.expr(e1) < me.expr(e2));
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binops.set("||",function(e1,e2) return me.expr(e1) == true || me.expr(e2) == true);
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binops.set("&&",function(e1,e2) return me.expr(e1) == true && me.expr(e2) == true);
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binops.set("=",assign);
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binops.set("...",function(e1,e2) return new #if (haxe_211 || haxe3) IntIterator #else IntIter #end(me.expr(e1),me.expr(e2)));
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assignOp("+=",function(v1:Dynamic,v2:Dynamic) return v1 + v2);
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assignOp("-=",function(v1:Float,v2:Float) return v1 - v2);
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assignOp("*=",function(v1:Float,v2:Float) return v1 * v2);
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assignOp("/=",function(v1:Float,v2:Float) return v1 / v2);
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assignOp("%=",function(v1:Float,v2:Float) return v1 % v2);
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assignOp("&=",function(v1,v2) return v1 & v2);
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assignOp("|=",function(v1,v2) return v1 | v2);
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assignOp("^=",function(v1,v2) return v1 ^ v2);
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assignOp("<<=",function(v1,v2) return v1 << v2);
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assignOp(">>=",function(v1,v2) return v1 >> v2);
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assignOp(">>>=",function(v1,v2) return v1 >>> v2);
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}
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function assign( e1 : Expr, e2 : Expr ) : Dynamic {
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var v = expr(e2);
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switch( edef(e1) ) {
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case EIdent(id):
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var l = locals.get(id);
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if( l == null )
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variables.set(id,v)
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else
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l.r = v;
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case EField(e,f):
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v = set(expr(e),f,v);
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case EArray(e, index):
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var arr:Dynamic = expr(e);
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var index:Dynamic = expr(index);
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if (isMap(arr)) {
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setMapValue(arr, index, v);
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}
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else {
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arr[index] = v;
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}
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default:
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error(EInvalidOp("="));
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}
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return v;
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}
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function assignOp( op, fop : Dynamic -> Dynamic -> Dynamic ) {
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var me = this;
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binops.set(op,function(e1,e2) return me.evalAssignOp(op,fop,e1,e2));
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}
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function evalAssignOp(op,fop,e1,e2) : Dynamic {
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var v;
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switch( edef(e1) ) {
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case EIdent(id):
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var l = locals.get(id);
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v = fop(expr(e1),expr(e2));
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if( l == null )
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variables.set(id,v)
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else
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l.r = v;
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case EField(e,f):
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var obj = expr(e);
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v = fop(get(obj,f),expr(e2));
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v = set(obj,f,v);
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case EArray(e, index):
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var arr:Dynamic = expr(e);
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var index:Dynamic = expr(index);
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if (isMap(arr)) {
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v = fop(getMapValue(arr, index), expr(e2));
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setMapValue(arr, index, v);
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}
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else {
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v = fop(arr[index],expr(e2));
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arr[index] = v;
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}
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default:
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return error(EInvalidOp(op));
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}
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return v;
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}
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function increment( e : Expr, prefix : Bool, delta : Int ) : Dynamic {
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#if hscriptPos
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curExpr = e;
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var e = e.e;
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#end
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switch(e) {
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case EIdent(id):
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var l = locals.get(id);
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var v : Dynamic = (l == null) ? variables.get(id) : l.r;
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if( prefix ) {
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v += delta;
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if( l == null ) variables.set(id,v) else l.r = v;
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} else
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if( l == null ) variables.set(id,v + delta) else l.r = v + delta;
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return v;
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case EField(e,f):
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var obj = expr(e);
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var v : Dynamic = get(obj,f);
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if( prefix ) {
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v += delta;
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set(obj,f,v);
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} else
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set(obj,f,v + delta);
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return v;
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case EArray(e, index):
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var arr:Dynamic = expr(e);
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var index:Dynamic = expr(index);
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if (isMap(arr)) {
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var v = getMapValue(arr, index);
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if (prefix) {
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v += delta;
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setMapValue(arr, index, v);
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}
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else {
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setMapValue(arr, index, v + delta);
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}
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return v;
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}
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else {
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var v = arr[index];
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if( prefix ) {
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v += delta;
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arr[index] = v;
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} else
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arr[index] = v + delta;
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return v;
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}
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default:
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return error(EInvalidOp((delta > 0)?"++":"--"));
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}
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}
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public function execute( expr : Expr ) : Dynamic {
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depth = 0;
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#if haxe3
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locals = new Map();
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#else
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locals = new Hash();
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#end
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declared = new Array();
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return exprReturn(expr);
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}
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function exprReturn(e) : Dynamic {
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try {
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return expr(e);
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} catch( e : Stop ) {
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switch( e ) {
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case SBreak: throw "Invalid break";
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case SContinue: throw "Invalid continue";
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case SReturn(v): return v;
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}
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}
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return null;
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}
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function duplicate<T>( h : #if haxe3 Map < String, T > #else Hash<T> #end ) {
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#if haxe3
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var h2 = new Map();
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#else
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var h2 = new Hash();
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#end
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for( k in h.keys() )
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h2.set(k,h.get(k));
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return h2;
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}
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function restore( old : Int ) {
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while( declared.length > old ) {
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var d = declared.pop();
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locals.set(d.n,d.old);
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}
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}
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inline function edef( e : Expr ) {
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#if hscriptPos
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return e.e;
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#else
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return e;
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#end
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}
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inline function error(e : #if hscriptPos ErrorDef #else Error #end ) : Dynamic {
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#if hscriptPos
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throw new Error(e, curExpr.pmin, curExpr.pmax, curExpr.origin, curExpr.line);
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#else
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throw e;
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#end
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return null;
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}
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function resolve( id : String ) : Dynamic {
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var l = locals.get(id);
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if( l != null )
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return l.r;
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var v = variables.get(id);
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if( v == null && !variables.exists(id) )
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error(EUnknownVariable(id));
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return v;
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}
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public function expr( e : Expr ) : Dynamic {
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#if hscriptPos
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curExpr = e;
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var e = e.e;
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#end
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switch( e ) {
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case EConst(c):
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switch( c ) {
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case CInt(v): return v;
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case CFloat(f): return f;
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case CString(s): return s;
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#if !haxe3
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case CInt32(v): return v;
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#end
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}
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case EIdent(id):
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return resolve(id);
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case EVar(n,_,e):
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declared.push({ n : n, old : locals.get(n) });
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locals.set(n,{ r : (e == null)?null:expr(e) });
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return null;
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case EParent(e):
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return expr(e);
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case EBlock(exprs):
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var old = declared.length;
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var v = null;
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for( e in exprs )
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v = expr(e);
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restore(old);
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return v;
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case EField(e,f):
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return get(expr(e),f);
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case EBinop(op,e1,e2):
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var fop = binops.get(op);
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if( fop == null ) error(EInvalidOp(op));
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return fop(e1,e2);
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case EUnop(op,prefix,e):
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switch(op) {
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case "!":
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return expr(e) != true;
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case "-":
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return -expr(e);
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case "++":
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return increment(e,prefix,1);
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case "--":
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return increment(e,prefix,-1);
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case "~":
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#if (neko && !haxe3)
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return haxe.Int32.complement(expr(e));
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#else
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return ~expr(e);
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#end
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default:
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error(EInvalidOp(op));
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}
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case ECall(e,params):
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var args = new Array();
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for( p in params )
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args.push(expr(p));
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switch( edef(e) ) {
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case EField(e,f):
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var obj = expr(e);
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if( obj == null ) error(EInvalidAccess(f));
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return fcall(obj,f,args);
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default:
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return call(null,expr(e),args);
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}
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case EIf(econd,e1,e2):
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return if( expr(econd) == true ) expr(e1) else if( e2 == null ) null else expr(e2);
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case EWhile(econd,e):
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whileLoop(econd,e);
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return null;
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case EDoWhile(econd,e):
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doWhileLoop(econd,e);
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return null;
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case EFor(v,it,e):
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forLoop(v,it,e);
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return null;
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case EBreak:
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throw SBreak;
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case EContinue:
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throw SContinue;
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case EReturn(e):
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throw SReturn((e == null)?null:expr(e));
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case EFunction(params,fexpr,name,_):
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var capturedLocals = duplicate(locals);
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var me = this;
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var hasOpt = false, minParams = 0;
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for( p in params )
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if( p.opt )
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hasOpt = true;
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else
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minParams++;
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var f = function(args:Array<Dynamic>) {
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if( args.length != params.length ) {
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if( args.length < minParams ) {
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var str = "Invalid number of parameters. Got " + args.length + ", required " + minParams;
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if( name != null ) str += " for function '" + name+"'";
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throw str;
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}
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// make sure mandatory args are forced
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var args2 = [];
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var extraParams = args.length - minParams;
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var pos = 0;
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for( p in params )
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if( p.opt ) {
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if( extraParams > 0 ) {
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args2.push(args[pos++]);
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extraParams--;
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} else
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args2.push(null);
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} else
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args2.push(args[pos++]);
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args = args2;
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}
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var old = me.locals, depth = me.depth;
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me.depth++;
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me.locals = me.duplicate(capturedLocals);
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for( i in 0...params.length )
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me.locals.set(params[i].name,{ r : args[i] });
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var r = null;
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if( inTry )
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try {
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r = me.exprReturn(fexpr);
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} catch( e : Dynamic ) {
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me.locals = old;
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me.depth = depth;
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#if neko
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neko.Lib.rethrow(e);
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#else
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throw e;
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#end
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}
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else
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r = me.exprReturn(fexpr);
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me.locals = old;
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me.depth = depth;
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return r;
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};
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var f = Reflect.makeVarArgs(f);
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if( name != null ) {
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if( depth == 0 ) {
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// global function
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variables.set(name, f);
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} else {
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// function-in-function is a local function
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declared.push( { n : name, old : locals.get(name) } );
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var ref = { r : f };
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locals.set(name, ref);
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capturedLocals.set(name, ref); // allow self-recursion
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}
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}
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return f;
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case EArrayDecl(arr):
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if (arr.length > 0 && edef(arr[0]).match(EBinop("=>", _))) {
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var isAllString:Bool = true;
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var isAllInt:Bool = true;
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var isAllObject:Bool = true;
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var isAllEnum:Bool = true;
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var keys:Array<Dynamic> = [];
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var values:Array<Dynamic> = [];
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for (e in arr) {
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switch(edef(e)) {
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case EBinop("=>", eKey, eValue): {
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var key:Dynamic = expr(eKey);
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var value:Dynamic = expr(eValue);
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isAllString = isAllString && Std.is(key, String);
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isAllInt = isAllInt && Std.is(key, Int);
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isAllObject = isAllObject && Reflect.isObject(key);
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isAllEnum = isAllEnum && Reflect.isEnumValue(key);
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keys.push(key);
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values.push(value);
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}
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default: throw("=> expected");
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}
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}
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var map:Dynamic = {
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if (isAllInt) new haxe.ds.IntMap<Dynamic>();
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else if (isAllString) new haxe.ds.StringMap<Dynamic>();
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else if (isAllEnum) new haxe.ds.EnumValueMap<Dynamic, Dynamic>();
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else if (isAllObject) new haxe.ds.ObjectMap<Dynamic, Dynamic>();
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else throw 'Inconsistent key types';
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}
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for (n in 0...keys.length) {
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setMapValue(map, keys[n], values[n]);
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}
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return map;
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}
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else {
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var a = new Array();
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for ( e in arr ) {
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a.push(expr(e));
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}
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return a;
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}
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case EArray(e, index):
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var arr:Dynamic = expr(e);
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var index:Dynamic = expr(index);
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if (isMap(arr)) {
|
|
return getMapValue(arr, index);
|
|
}
|
|
else {
|
|
return arr[index];
|
|
}
|
|
case ENew(cl,params):
|
|
var a = new Array();
|
|
for( e in params )
|
|
a.push(expr(e));
|
|
return cnew(cl,a);
|
|
case EThrow(e):
|
|
throw expr(e);
|
|
case ETry(e,n,_,ecatch):
|
|
var old = declared.length;
|
|
var oldTry = inTry;
|
|
try {
|
|
inTry = true;
|
|
var v : Dynamic = expr(e);
|
|
restore(old);
|
|
inTry = oldTry;
|
|
return v;
|
|
} catch( err : Stop ) {
|
|
inTry = oldTry;
|
|
throw err;
|
|
} catch( err : Dynamic ) {
|
|
// restore vars
|
|
restore(old);
|
|
inTry = oldTry;
|
|
// declare 'v'
|
|
declared.push({ n : n, old : locals.get(n) });
|
|
locals.set(n,{ r : err });
|
|
var v : Dynamic = expr(ecatch);
|
|
restore(old);
|
|
return v;
|
|
}
|
|
case EObject(fl):
|
|
var o = {};
|
|
for( f in fl )
|
|
set(o,f.name,expr(f.e));
|
|
return o;
|
|
case ETernary(econd,e1,e2):
|
|
return if( expr(econd) == true ) expr(e1) else expr(e2);
|
|
case ESwitch(e, cases, def):
|
|
var val : Dynamic = expr(e);
|
|
var match = false;
|
|
for( c in cases ) {
|
|
for( v in c.values )
|
|
if( expr(v) == val ) {
|
|
match = true;
|
|
break;
|
|
}
|
|
if( match ) {
|
|
val = expr(c.expr);
|
|
break;
|
|
}
|
|
}
|
|
if( !match )
|
|
val = def == null ? null : expr(def);
|
|
return val;
|
|
case EMeta(_, _, e):
|
|
return expr(e);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
function doWhileLoop(econd,e) {
|
|
var old = declared.length;
|
|
do {
|
|
try {
|
|
expr(e);
|
|
} catch( err : Stop ) {
|
|
switch(err) {
|
|
case SContinue:
|
|
case SBreak: break;
|
|
case SReturn(_): throw err;
|
|
}
|
|
}
|
|
}
|
|
while( expr(econd) == true );
|
|
restore(old);
|
|
}
|
|
|
|
function whileLoop(econd,e) {
|
|
var old = declared.length;
|
|
while( expr(econd) == true ) {
|
|
try {
|
|
expr(e);
|
|
} catch( err : Stop ) {
|
|
switch(err) {
|
|
case SContinue:
|
|
case SBreak: break;
|
|
case SReturn(_): throw err;
|
|
}
|
|
}
|
|
}
|
|
restore(old);
|
|
}
|
|
|
|
function makeIterator( v : Dynamic ) : Iterator<Dynamic> {
|
|
#if ((flash && !flash9) || php)
|
|
if ( v.iterator != null ) v = v.iterator();
|
|
#else
|
|
try v = v.iterator() catch( e : Dynamic ) {};
|
|
#end
|
|
if( v.hasNext == null || v.next == null ) error(EInvalidIterator(v));
|
|
return v;
|
|
}
|
|
|
|
function forLoop(n,it,e) {
|
|
var old = declared.length;
|
|
declared.push({ n : n, old : locals.get(n) });
|
|
var it = makeIterator(expr(it));
|
|
while( it.hasNext() ) {
|
|
locals.set(n,{ r : it.next() });
|
|
try {
|
|
expr(e);
|
|
} catch( err : Stop ) {
|
|
switch( err ) {
|
|
case SContinue:
|
|
case SBreak: break;
|
|
case SReturn(_): throw err;
|
|
}
|
|
}
|
|
}
|
|
restore(old);
|
|
}
|
|
|
|
inline function isMap(o:Dynamic):Bool {
|
|
return Std.is(o, haxe.Constraints.IMap);
|
|
}
|
|
|
|
inline function getMapValue(map:Dynamic, key:Dynamic):Dynamic {
|
|
return cast(map, haxe.Constraints.IMap<Dynamic, Dynamic>).get(key);
|
|
}
|
|
|
|
inline function setMapValue(map:Dynamic, key:Dynamic, value:Dynamic):Void {
|
|
cast(map, haxe.Constraints.IMap<Dynamic, Dynamic>).set(key, value);
|
|
}
|
|
|
|
function get( o : Dynamic, f : String ) : Dynamic {
|
|
if ( o == null ) error(EInvalidAccess(f));
|
|
return {
|
|
#if php
|
|
// https://github.com/HaxeFoundation/haxe/issues/4915
|
|
try {
|
|
Reflect.getProperty(o, f);
|
|
} catch (e:Dynamic) {
|
|
Reflect.field(o, f);
|
|
}
|
|
#else
|
|
Reflect.getProperty(o, f);
|
|
#end
|
|
}
|
|
}
|
|
|
|
function set( o : Dynamic, f : String, v : Dynamic ) : Dynamic {
|
|
if( o == null ) error(EInvalidAccess(f));
|
|
Reflect.setProperty(o,f,v);
|
|
return v;
|
|
}
|
|
|
|
function fcall( o : Dynamic, f : String, args : Array<Dynamic> ) : Dynamic {
|
|
return call(o, get(o, f), args);
|
|
}
|
|
|
|
function call( o : Dynamic, f : Dynamic, args : Array<Dynamic> ) : Dynamic {
|
|
return Reflect.callMethod(o,f,args);
|
|
}
|
|
|
|
function cnew( cl : String, args : Array<Dynamic> ) : Dynamic {
|
|
var c = Type.resolveClass(cl);
|
|
if( c == null ) c = resolve(cl);
|
|
return Type.createInstance(c,args);
|
|
}
|
|
|
|
}
|