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acorn_interpreter.js
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// Acorn: Copyright 2012 Marijn Haverbeke, MIT License
(function(X,k){if("object"==typeof exports&&"object"==typeof module)return k(exports);if("function"==typeof define&&define.amd)return define(["exports"],k);k(X.acorn||(X.acorn={}))})(this,function(X){function k(a,b){var c=f;for(var e=1,g=0;;){ja.lastIndex=g;var w=ja.exec(c);if(w&&w.index<a)++e,g=w.index+w[0].length;else break}c={line:e,column:a-g};b+=" ("+c.line+":"+c.column+")";b=new SyntaxError(b);b.pos=a;b.loc=c;b.raisedAt=d;throw b;}function ka(a){a=a.split(" ");for(var b=Object.create(null),
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oa=/[\n\r\u2028\u2029]/,ja=/\r\n|[\n\r\u2028\u2029]/g,la=function(a){return 65>a?36===a:91>a?!0:97>a?95===a:123>a?!0:170<=a&&cb.test(String.fromCharCode(a))},fb=function(a){return 48>a?36===a:58>a?!0:65>a?!1:91>a?!0:97>a?95===a:123>a?!0:170<=a&&Ub.test(String.fromCharCode(a))},U,Ga={kind:"loop"},Rb={kind:"switch"}});
// JS-Interpreter: Copyright 2013 Google LLC, Apache 2.0
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-1!==f.labels.indexOf(c):f.pa))return}P(a,d,a.B)?(b={EvalError:EvalError,RangeError:RangeError,ReferenceError:ReferenceError,SyntaxError:SyntaxError,TypeError:TypeError,URIError:URIError},c=String(a.A(d,"name")),e=a.A(d,"message").valueOf(),b=(b[c]||Error)(e),b.stack=String(a.A(d,"stack"))):b=String(d);a.value=b;throw b;}
function Z(a,b,d){if(!a.K)throw Error("Unexpected call to createGetter");a.K=!1;d=Array.isArray(d)?d[0]:d;var c=new a.ya;c.type="CallExpression";a=new r(c,a.l[a.l.length-1].scope);a.ga=2;a.v=d;a.W=b;a.Ja=!0;a.C=[];return a}function Ca(a,b,d,c){if(!a.va)throw Error("Unexpected call to createSetter");a.va=!1;d=Array.isArray(d)?d[0]:a.Ga;var e=new a.ya;e.type="CallExpression";a=new r(e,a.l[a.l.length-1].scope);a.ga=2;a.v=d;a.W=b;a.Ja=!0;a.C=[c];return a}
function Da(a,b){return void 0===b||null===b?a.Ga:b instanceof H?b:(a=a.m(M(a,b)),a.data=b,a)}h.sb=function(){return this.J};h.tb=function(){return this.l};h.xb=function(a){this.l=a};function r(a,b){this.node=a;this.scope=b}function wa(a,b,d){this.Ea=a;this.M=b;this.object=d}function H(a){this.N=Object.create(null);this.O=Object.create(null);this.h=Object.create(null);this.ja=a}h=H.prototype;h.ja=null;h.D="Object";h.data=null;
h.toString=function(){if(!B)return"[object Interpreter.Object]";if(!(this instanceof H))return String(this);if("Array"===this.D){var a=ea;a.push(this);try{var b=[],d=this.h.length,c=!1;1024<d&&(d=1E3,c=!0);for(var e=0;e<d;e++){var f=this.h[e];b[e]=f instanceof H&&-1!==a.indexOf(f)?"...":f}c&&b.push("...")}finally{a.pop()}return b.join(",")}if("Error"===this.D){a=ea;if(-1!==a.indexOf(this))return"[object Error]";d=this;do if("name"in d.h){b=d.h.name;break}while(d=d.ja);d=this;do if("message"in d.h){c=
d.h.message;break}while(d=d.ja);a.push(this);try{b=b&&String(b),c=c&&String(c)}finally{a.pop()}return c?b+": "+c:String(b)}return null!==this.data?String(this.data):"[object "+this.D+"]"};h.valueOf=function(){return!B||void 0===this.data||null===this.data||this.data instanceof RegExp?this:this.data instanceof Date?this.data.valueOf():this.data};
k.prototype.stepArrayExpression=function(a,b,d){d=d.elements;var c=b.u||0;b.za?(this.g(b.za,c,b.value),c++):(b.za=O(this),b.za.h.length=d.length);for(;c<d.length;){if(d[c])return b.u=c,new r(d[c],b.scope);c++}a.pop();a[a.length-1].value=b.za};
k.prototype.stepAssignmentExpression=function(a,b,d){if(!b.Z)return b.Z=!0,b=new r(d.left,b.scope),b.fa=!0,b;if(!b.oa){b.qa||(b.qa=b.value);b.ma&&(b.aa=b.value);if(!b.ma&&"="!==d.operator&&(a=Aa(this,b.qa),b.aa=a,this.K))return b.ma=!0,Z(this,a,b.qa);b.oa=!0;"="===d.operator&&"Identifier"===d.left.type&&(b.Aa=d.left.name);return new r(d.right,b.scope)}if(b.ha)a.pop(),a[a.length-1].value=b.Na;else{var c=b.aa,e=b.value;switch(d.operator){case "=":c=e;break;case "+=":c+=e;break;case "-=":c-=e;break;
case "*=":c*=e;break;case "/=":c/=e;break;case "%=":c%=e;break;case "<<=":c<<=e;break;case ">>=":c>>=e;break;case ">>>=":c>>>=e;break;case "&=":c&=e;break;case "^=":c^=e;break;case "|=":c|=e;break;default:throw SyntaxError("Unknown assignment expression: "+d.operator);}if(d=Ba(this,b.qa,c))return b.ha=!0,b.Na=c,Ca(this,d,b.qa,c);a.pop();a[a.length-1].value=c}};
k.prototype.stepBinaryExpression=function(a,b,d){if(!b.Z)return b.Z=!0,new r(d.left,b.scope);if(!b.oa)return b.oa=!0,b.aa=b.value,new r(d.right,b.scope);a.pop();var c=b.aa;b=b.value;switch(d.operator){case "==":d=c==b;break;case "!=":d=c!=b;break;case "===":d=c===b;break;case "!==":d=c!==b;break;case ">":d=c>b;break;case ">=":d=c>=b;break;case "<":d=c<b;break;case "<=":d=c<=b;break;case "+":d=c+b;break;case "-":d=c-b;break;case "*":d=c*b;break;case "/":d=c/b;break;case "%":d=c%b;break;case "&":d=
c&b;break;case "|":d=c|b;break;case "^":d=c^b;break;case "<<":d=c<<b;break;case ">>":d=c>>b;break;case ">>>":d=c>>>b;break;case "in":b instanceof H||I(this,this.j,"'in' expects an object, not '"+b+"'");d=W(this,b,c);break;case "instanceof":P(this,b,this.I)||I(this,this.j,"Right-hand side of instanceof is not an object");d=c instanceof H?P(this,c,b):!1;break;default:throw SyntaxError("Unknown binary operator: "+d.operator);}a[a.length-1].value=d};
k.prototype.stepBlockStatement=function(a,b,d){var c=b.u||0;if(d=d.body[c])return b.u=c+1,new r(d,b.scope);a.pop()};k.prototype.stepBreakStatement=function(a,b,d){X(this,1,void 0,d.label&&d.label.name)};k.prototype.fb=0;
k.prototype.stepCallExpression=function(a,b,d){if(!b.ga){b.ga=1;var c=new r(d.callee,b.scope);c.fa=!0;return c}if(1===b.ga){b.ga=2;c=b.value;if(Array.isArray(c)){if(b.W=Aa(this,c),c[0]===w?b.lb="eval"===c[1]:b.v=c[0],c=b.W,this.K)return b.ga=1,Z(this,c,b.value)}else b.W=c;b.C=[];b.u=0}c=b.W;if(!b.Ja){0!==b.u&&b.C.push(b.value);if(d.arguments[b.u])return new r(d.arguments[b.u++],b.scope);if("NewExpression"===d.type){c instanceof H&&!c.$a||I(this,this.j,c+" is not a constructor");if(c===this.da)b.v=
O(this);else{var e=c.h.prototype;if("object"!==typeof e||null===e)e=this.H;b.v=this.m(e)}b.isConstructor=!0}b.Ja=!0}if(b.Ka)a.pop(),a[a.length-1].value=b.isConstructor&&"object"!==typeof b.value?b.v:b.value;else{b.Ka=!0;c instanceof H||I(this,this.j,c+" is not a function");if(a=c.node){d=n(this,a.body,c.Ea);for(var f=0;f<a.params.length;f++)this.g(d.object,a.params[f].name,b.C.length>f?b.C[f]:void 0);e=O(this);for(f=0;f<b.C.length;f++)this.g(e,f,b.C[f]);this.g(d.object,"arguments",e);(f=a.id&&a.id.name)&&
this.g(d.object,f,c);d.M||(b.v=Da(this,b.v));this.g(d.object,"this",b.v,ba);b.value=void 0;return new r(a.body,d)}if(c.eval)if(c=b.C[0],"string"!==typeof c)b.value=c;else{try{f=l(String(c),"eval"+this.fb++)}catch(m){I(this,this.T,"Invalid code: "+m.message)}c=new this.ya;c.type="EvalProgram_";c.body=f.body;p(c,d.start,d.end);d=b.lb?b.scope:this.J;d.M?d=n(this,f,d):G(this,f,d);this.value=void 0;return new r(c,d)}else if(c.Da)b.scope.M||(b.v=Da(this,b.v)),b.value=c.Da.apply(b.v,b.C);else if(c.Ha){var g=
this;f=c.Ha.length-1;f=b.C.concat(Array(f)).slice(0,f);f.push(function(m){b.value=m;g.ka=!1});this.ka=!0;b.scope.M||(b.v=Da(this,b.v));c.Ha.apply(b.v,f)}else I(this,this.j,c.D+" is not callable")}};
k.prototype.stepConditionalExpression=function(a,b,d){var c=b.ba||0;if(0===c)return b.ba=1,new r(d.test,b.scope);if(1===c){b.ba=2;if((c=!!b.value)&&d.consequent)return new r(d.consequent,b.scope);if(!c&&d.alternate)return new r(d.alternate,b.scope);this.value=void 0}a.pop();"ConditionalExpression"===d.type&&(a[a.length-1].value=b.value)};k.prototype.stepContinueStatement=function(a,b,d){X(this,2,void 0,d.label&&d.label.name)};k.prototype.stepDebuggerStatement=function(a){a.pop()};
k.prototype.stepDoWhileStatement=function(a,b,d){"DoWhileStatement"===d.type&&void 0===b.X&&(b.value=!0,b.X=!0);if(!b.X)return b.X=!0,new r(d.test,b.scope);if(!b.value)a.pop();else if(d.body)return b.X=!1,b.pa=!0,new r(d.body,b.scope)};k.prototype.stepEmptyStatement=function(a){a.pop()};k.prototype.stepEvalProgram_=function(a,b,d){var c=b.u||0;if(d=d.body[c])return b.u=c+1,new r(d,b.scope);a.pop();a[a.length-1].value=this.value};
k.prototype.stepExpressionStatement=function(a,b,d){if(!b.$)return this.value=void 0,b.$=!0,new r(d.expression,b.scope);a.pop();this.value=b.value};
k.prototype.stepForInStatement=function(a,b,d){if(!b.pb&&(b.pb=!0,d.left.declarations&&d.left.declarations[0].init))return b.scope.M&&I(this,this.T,"for-in loop variable declaration may not have an initializer."),new r(d.left,b.scope);if(!b.na)return b.na=!0,b.ca||(b.ca=b.value),new r(d.right,b.scope);b.pa||(b.pa=!0,b.o=b.value,b.Pa=Object.create(null));if(void 0===b.Ba)a:for(;;){if(b.o instanceof H)for(b.ia||(b.ia=Object.getOwnPropertyNames(b.o.h));;){var c=b.ia.shift();if(void 0===c)break;if(Object.prototype.hasOwnProperty.call(b.o.h,
c)&&!b.Pa[c]&&(b.Pa[c]=!0,Object.prototype.propertyIsEnumerable.call(b.o.h,c))){b.Ba=c;break a}}else if(null!==b.o&&void 0!==b.o)for(b.ia||(b.ia=Object.getOwnPropertyNames(b.o));;){c=b.ia.shift();if(void 0===c)break;b.Pa[c]=!0;if(Object.prototype.propertyIsEnumerable.call(b.o,c)){b.Ba=c;break a}}b.o=M(this,b.o);b.ia=null;if(null===b.o){a.pop();return}}if(!b.Ya)if(b.Ya=!0,a=d.left,"VariableDeclaration"===a.type)b.ca=[w,a.declarations[0].id.name];else return b.ca=null,b=new r(a,b.scope),b.fa=!0,b;b.ca||
(b.ca=b.value);if(!b.ha&&(b.ha=!0,a=b.Ba,c=Ba(this,b.ca,a)))return Ca(this,c,b.ca,a);b.Ba=void 0;b.Ya=!1;b.ha=!1;if(d.body)return new r(d.body,b.scope)};k.prototype.stepForStatement=function(a,b,d){switch(b.ba){default:b.ba=1;if(d.init)return new r(d.init,b.scope);break;case 1:b.ba=2;if(d.test)return new r(d.test,b.scope);break;case 2:b.ba=3;if(d.test&&!b.value)a.pop();else return b.pa=!0,new r(d.body,b.scope);break;case 3:if(b.ba=1,d.update)return new r(d.update,b.scope)}};
k.prototype.stepFunctionDeclaration=function(a){a.pop()};k.prototype.stepFunctionExpression=function(a,b,d){a.pop();b=a[a.length-1];b.value=J(this,d,b.scope,b.Aa)};k.prototype.stepIdentifier=function(a,b,d){a.pop();if(b.fa)a[a.length-1].value=[w,d.name];else{b=ya(this,d.name);if(this.K)return Z(this,b,this.Ga);a[a.length-1].value=b}};k.prototype.stepIfStatement=k.prototype.stepConditionalExpression;
k.prototype.stepLabeledStatement=function(a,b,d){a.pop();a=b.labels||[];a.push(d.label.name);b=new r(d.body,b.scope);b.labels=a;return b};k.prototype.stepLiteral=function(a,b,d){a.pop();b=d.value;b instanceof RegExp&&(d=this.m(this.xa),U(this,d,b),b=d);a[a.length-1].value=b};
k.prototype.stepLogicalExpression=function(a,b,d){if("&&"!==d.operator&&"||"!==d.operator)throw SyntaxError("Unknown logical operator: "+d.operator);if(!b.Z)return b.Z=!0,new r(d.left,b.scope);if(b.oa)a.pop(),a[a.length-1].value=b.value;else if("&&"===d.operator&&!b.value||"||"===d.operator&&b.value)a.pop(),a[a.length-1].value=b.value;else return b.oa=!0,new r(d.right,b.scope)};
k.prototype.stepMemberExpression=function(a,b,d){if(!b.na)return b.na=!0,new r(d.object,b.scope);if(d.computed)if(b.qb)d=b.value;else return b.o=b.value,b.qb=!0,new r(d.property,b.scope);else b.o=b.value,d=d.property.name;a.pop();if(b.fa)a[a.length-1].value=[b.o,d];else{d=this.A(b.o,d);if(this.K)return Z(this,d,b.o);a[a.length-1].value=d}};k.prototype.stepNewExpression=k.prototype.stepCallExpression;
k.prototype.stepObjectExpression=function(a,b,d){var c=b.u||0,e=d.properties[c];if(b.o){var f=b.Aa;b.ua[f]||(b.ua[f]={});b.ua[f][e.kind]=b.value;b.u=++c;e=d.properties[c]}else b.o=this.m(this.H),b.ua=Object.create(null);if(e){var g=e.key;if("Identifier"===g.type)f=g.name;else if("Literal"===g.type)f=g.value;else throw SyntaxError("Unknown object structure: "+g.type);b.Aa=f;return new r(e.value,b.scope)}for(g in b.ua)d=b.ua[g],"get"in d||"set"in d?this.g(b.o,g,y,{configurable:!0,enumerable:!0,get:d.get,
set:d.set}):this.g(b.o,g,d.init);a.pop();a[a.length-1].value=b.o};k.prototype.stepProgram=function(a,b,d){if(a=d.body.shift())return b.done=!1,new r(a,b.scope);b.done=!0};k.prototype.stepReturnStatement=function(a,b,d){if(d.argument&&!b.$)return b.$=!0,new r(d.argument,b.scope);X(this,3,b.value)};k.prototype.stepSequenceExpression=function(a,b,d){var c=b.u||0;if(d=d.expressions[c])return b.u=c+1,new r(d,b.scope);a.pop();a[a.length-1].value=b.value};
k.prototype.stepSwitchStatement=function(a,b,d){if(!b.X)return b.X=1,new r(d.discriminant,b.scope);1===b.X&&(b.X=2,b.yb=b.value,b.Ia=-1);for(;;){var c=b.La||0,e=d.cases[c];if(b.sa||!e||e.test)if(e||b.sa||-1===b.Ia)if(e){if(!b.sa&&!b.cb&&e.test)return b.cb=!0,new r(e.test,b.scope);if(b.sa||b.value===b.yb){b.sa=!0;var f=b.u||0;if(e.consequent[f])return b.ub=!0,b.u=f+1,new r(e.consequent[f],b.scope)}b.cb=!1;b.u=0;b.La=c+1}else{a.pop();break}else b.sa=!0,b.La=b.Ia;else b.Ia=c,b.La=c+1}};
k.prototype.stepThisExpression=function(a){a.pop();a[a.length-1].value=ya(this,"this")};k.prototype.stepThrowStatement=function(a,b,d){if(b.$)I(this,b.value);else return b.$=!0,new r(d.argument,b.scope)};
k.prototype.stepTryStatement=function(a,b,d){if(!b.mb)return b.mb=!0,new r(d.block,b.scope);if(b.V&&4===b.V.type&&!b.ob&&d.handler)return b.ob=!0,a=xa(this,b.scope),this.g(a.object,d.handler.param.name,b.V.value),b.V=void 0,new r(d.handler.body,a);if(!b.nb&&d.finalizer)return b.nb=!0,new r(d.finalizer,b.scope);a.pop();b.V&&X(this,b.V.type,b.V.value,b.V.label)};
k.prototype.stepUnaryExpression=function(a,b,d){if(!b.$)return b.$=!0,a=new r(d.argument,b.scope),a.fa="delete"===d.operator,a;a.pop();var c=b.value;switch(d.operator){case "-":c=-c;break;case "+":c=+c;break;case "!":c=!c;break;case "~":c=~c;break;case "delete":d=!0;if(Array.isArray(c)){var e=c[0];e===w&&(e=b.scope);c=String(c[1]);try{delete e.h[c]}catch(f){b.scope.M?I(this,this.j,"Cannot delete property '"+c+"' of '"+e+"'"):d=!1}}c=d;break;case "typeof":c=c&&"Function"===c.D?"function":typeof c;
break;case "void":c=void 0;break;default:throw SyntaxError("Unknown unary operator: "+d.operator);}a[a.length-1].value=c};
k.prototype.stepUpdateExpression=function(a,b,d){if(!b.Z)return b.Z=!0,a=new r(d.argument,b.scope),a.fa=!0,a;b.ra||(b.ra=b.value);b.ma&&(b.aa=b.value);if(!b.ma){var c=Aa(this,b.ra);b.aa=c;if(this.K)return b.ma=!0,Z(this,c,b.ra)}if(b.ha)a.pop(),a[a.length-1].value=b.Na;else{c=Number(b.aa);if("++"===d.operator)var e=c+1;else if("--"===d.operator)e=c-1;else throw SyntaxError("Unknown update expression: "+d.operator);d=d.prefix?e:c;if(c=Ba(this,b.ra,e))return b.ha=!0,b.Na=d,Ca(this,c,b.ra,e);a.pop();
a[a.length-1].value=d}};k.prototype.stepVariableDeclaration=function(a,b,d){d=d.declarations;var c=b.u||0,e=d[c];b.ab&&e&&(za(this,e.id.name,b.value),b.ab=!1,e=d[++c]);for(;e;){if(e.init)return b.u=c,b.ab=!0,b.Aa=e.id.name,new r(e.init,b.scope);e=d[++c]}a.pop()};k.prototype.stepWithStatement=function(a,b,d){if(!b.na)return b.na=!0,new r(d.object,b.scope);a.pop();a=xa(this,b.scope,b.value);return new r(d.body,a)};k.prototype.stepWhileStatement=k.prototype.stepDoWhileStatement;D.Interpreter=k;
k.prototype.step=k.prototype.Qa;k.prototype.run=k.prototype.bb;k.prototype.appendCode=k.prototype.gb;k.prototype.createObject=k.prototype.la;k.prototype.createObjectProto=k.prototype.m;k.prototype.createAsyncFunction=k.prototype.Xa;k.prototype.createNativeFunction=k.prototype.i;k.prototype.getProperty=k.prototype.A;k.prototype.setProperty=k.prototype.g;k.prototype.nativeToPseudo=k.prototype.ta;k.prototype.pseudoToNative=k.prototype.L;k.prototype.getGlobalScope=k.prototype.sb;
k.prototype.getStateStack=k.prototype.tb;k.prototype.setStateStack=k.prototype.xb;k.VALUE_IN_DESCRIPTOR=y;