root / trunk / web / dojo / dojox / lang / functional / lambda.js @ 13
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/*
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Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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Available via Academic Free License >= 2.1 OR the modified BSD license.
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see: http://dojotoolkit.org/license for details
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*/
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if(!dojo._hasResource["dojox.lang.functional.lambda"]){ |
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dojo._hasResource["dojox.lang.functional.lambda"]=true; |
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dojo.provide("dojox.lang.functional.lambda");
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(function(){
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var df=dojox.lang.functional,_1={};
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var _2="ab".split(/a*/).length>1?String.prototype.split:function(_3){ |
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var r=this.split.call(this,_3),m=_3.exec(this); |
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if(m&&m.index==0){ |
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r.unshift("");
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} |
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return r;
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}; |
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var _4=function(s){ |
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var _5=[],_6=_2.call(s,/\s*->\s*/m); |
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if(_6.length>1){ |
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while(_6.length){
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s=_6.pop(); |
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_5=_6.pop().split(/\s*,\s*|\s+/m);
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if(_6.length){
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_6.push("(function("+_5+"){return ("+s+")})"); |
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} |
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} |
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}else{
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if(s.match(/\b_\b/)){ |
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_5=["_"];
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}else{
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var l=s.match(/^\s*(?:[+*\/%&|\^\.=<>]|!=)/m),r=s.match(/[+\-*\/%&|\^\.=<>!]\s*$/m); |
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if(l||r){
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if(l){
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_5.push("$1");
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s="$1"+s;
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} |
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if(r){
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_5.push("$2");
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s=s+"$2";
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} |
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}else{
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var _7=s.replace(/(?:\b[A-Z]|\.[a-zA-Z_$])[a-zA-Z_$\d]*|[a-zA-Z_$][a-zA-Z_$\d]*:|this|true|false|null|undefined|typeof|instanceof|in|delete|new|void|arguments|decodeURI|decodeURIComponent|encodeURI|encodeURIComponent|escape|eval|isFinite|isNaN|parseFloat|parseInt|unescape|dojo|dijit|dojox|window|document|'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"/g,"").match(/([a-z_$][a-z_$\d]*)/gi)||[],t={}; |
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dojo.forEach(_7,function(v){
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if(!(v in t)){ |
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_5.push(v); |
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t[v]=1;
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} |
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}); |
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} |
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} |
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} |
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return {args:_5,body:s}; |
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}; |
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var _8=function(a){ |
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return a.length?function(){ |
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var i=a.length-1,x=df.lambda(a[i]).apply(this,arguments); |
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for(--i;i>=0;--i){ |
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x=df.lambda(a[i]).call(this,x);
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} |
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return x;
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}:function(x){
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return x;
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}; |
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}; |
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dojo.mixin(df,{rawLambda:function(s){
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return _4(s);
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},buildLambda:function(s){ |
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s=_4(s); |
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return "function("+s.args.join(",")+"){return ("+s.body+");}"; |
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},lambda:function(s){ |
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if(typeof s=="function"){ |
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return s;
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} |
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if(s instanceof Array){ |
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return _8(s);
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} |
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if(s in _1){ |
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return _1[s];
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} |
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s=_4(s); |
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return _1[s]=new Function(s.args,"return ("+s.body+");"); |
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},clearLambdaCache:function(){ |
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_1={};
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}}); |
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})(); |
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} |