// Acorn: Copyright 2012 Marijn Haverbeke, MIT License
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function ra(a,b,c,d){c?b.start=c:delete b.start;d?b.end=d:delete b.end;for(var e in b)if(b.hasOwnProperty(e)){var g=b[e];g&&"object"===typeof g&&ra(a,g,c,d)}}function vc(a){return a.j[a.j.length-1].isConstructor}function Yc(a,b){return b[0]===Ba?Wc(a,b[1]):a.v(b[0],b[1])}function Zc(a,b,c){return b[0]===Ba?Xc(a,b[1],c):a.setProperty(b[0],b[1],c)}function J(a,b,c){void 0!==c&&(b=a.pa(b),a.setProperty(b,"message",c,A));$c(a,4,b,void 0);throw Aa;}
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function bd(a,b,c,d){c=Array.isArray(c)?c[0]:a.global;var e=new a.Ra({options:{}});e.type="CallExpression";a=new y(e,a.j[a.j.length-1].scope);a.ja=!0;a.J=c;a.Z=b;a.Oa=!0;a.B=[d];return a}function y(a,b){this.node=a;this.scope=b}u.prototype.stepArrayExpression=function(a,b,c){c=c.elements;var d=b.s||0;b.Ba?(this.setProperty(b.Ba,d,b.value),d++):(b.Ba=this.g(this.ea),b.Ba.a.length=c.length);for(;d<c.length;){if(c[d])return b.s=d,new y(c[d],b.scope);d++}a.pop();a[a.length-1].value=b.Ba};
u.prototype.stepAssignmentExpression=function(a,b,c){if(!b.Y)return b.Y=!0,b=new y(c.left,b.scope),b.ia=!0,b;if(!b.sa){b.ua||(b.ua=b.value);b.qa&&(b.$=b.value);if(!b.qa&&"="!==c.operator&&(a=Yc(this,b.ua),(b.$=a)&&"object"===typeof a&&a.L))return a.L=!1,b.qa=!0,ad(this,a,b.ua);b.sa=!0;return new y(c.right,b.scope)}if(b.ka)a.pop(),a[a.length-1].value=b.Ua;else{var d=b.$,e=b.value;switch(c.operator){case "=":d=e;break;case "+=":d+=e;break;case "-=":d-=e;break;case "*=":d*=e;break;case "/=":d/=e;break;
case "%=":d%=e;break;case "<<=":d<<=e;break;case ">>=":d>>=e;break;case ">>>=":d>>>=e;break;case "&=":d&=e;break;case "^=":d^=e;break;case "|=":d|=e;break;default:throw SyntaxError("Unknown assignment expression: "+c.operator);}if(c=Zc(this,b.ua,d))return b.ka=!0,b.Ua=d,bd(this,c,b.ua,d);a.pop();a[a.length-1].value=d}};
u.prototype.stepBinaryExpression=function(a,b,c){if(!b.Y)return b.Y=!0,new y(c.left,b.scope);if(!b.sa)return b.sa=!0,b.$=b.value,new y(c.right,b.scope);a.pop();var d=b.$;b=b.value;switch(c.operator){case "==":c=d==b;break;case "!=":c=d!=b;break;case "===":c=d===b;break;case "!==":c=d!==b;break;case ">":c=d>b;break;case ">=":c=d>=b;break;case "<":c=d<b;break;case "<=":c=d<=b;break;case "+":c=d+b;break;case "-":c=d-b;break;case "*":c=d*b;break;case "/":c=d/b;break;case "%":c=d%b;break;case "&":c=d&
b;break;case "|":c=d|b;break;case "^":c=d^b;break;case "<<":c=d<<b;break;case ">>":c=d>>b;break;case ">>>":c=d>>>b;break;case "in":b&&b.o||J(this,this.h,"'in' expects an object, not '"+b+"'");c=xc(this,b,d);break;case "instanceof":T(this,b,this.C)||J(this,this.h,"Right-hand side of instanceof is not an object");c=d&&d.o?T(this,d,b):!1;break;default:throw SyntaxError("Unknown binary operator: "+c.operator);}a[a.length-1].value=c};
u.prototype.stepBlockStatement=function(a,b,c){var d=b.s||0;if(c=c.body[d])return b.s=d+1,new y(c,b.scope);a.pop()};u.prototype.stepBreakStatement=function(a,b,c){$c(this,1,void 0,c.label&&c.label.name)};
u.prototype.stepCallExpression=function(a,b,c){if(!b.ja){b.ja=1;var d=new y(c.callee,b.scope);d.ia=!0;return d}if(1===b.ja){b.ja=2;d=b.value;if(Array.isArray(d)){if(b.Z=Yc(this,d),d[0]===Ba?b.wb="eval"===d[1]:b.J=d[0],(d=b.Z)&&"object"===typeof d&&d.L)return d.L=!1,b.ja=1,ad(this,d,b.value)}else b.Z=d;b.B=[];b.s=0}d=b.Z;if(!b.Oa){0!==b.s&&b.B.push(b.value);if(c.arguments[b.s])return new y(c.arguments[b.s++],b.scope);if("NewExpression"===c.type){d.Fb&&J(this,this.h,d+" is not a constructor");var e=
d.a.prototype;if("object"!==typeof e||null===e)e=this.G;b.J=this.g(e);b.isConstructor=!0}else void 0===b.J&&(b.J=b.scope.H?void 0:this.global);b.Oa=!0}if(b.Pa)a.pop(),a[a.length-1].value=b.isConstructor&&"object"!==typeof b.value?b.J:b.value;else{b.Pa=!0;d&&d.o||J(this,this.h,d+" is not a function");if(a=d.node){c=ia(this,a.body,d.ca);for(var g=0;g<a.params.length;g++)this.setProperty(c,a.params[g].name,b.B.length>g?b.B[g]:void 0);e=this.g(this.ea);for(g=0;g<b.B.length;g++)this.setProperty(e,g,b.B[g]);
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b.B);else if(d.Ka){var l=this;g=d.Ka.length-1;g=b.B.concat(Array(g)).slice(0,g);g.push(function(q){b.value=q;l.ya=!1});this.ya=!0;d.Ka.apply(b.J,g)}else J(this,this.h,d.K+" is not a function")}};u.prototype.stepCatchClause=function(a,b,c){if(b.N)a.pop();else return b.N=!0,a=Vc(this,b.scope),this.setProperty(a,c.param.name,b.Ob),new y(c.body,a)};
u.prototype.stepConditionalExpression=function(a,b,c){var d=b.ba||0;if(0===d)return b.ba=1,new y(c.test,b.scope);if(1===d){b.ba=2;if((d=!!b.value)&&c.consequent)return new y(c.consequent,b.scope);if(!d&&c.alternate)return new y(c.alternate,b.scope);this.value=void 0}a.pop();"ConditionalExpression"===c.type&&(a[a.length-1].value=b.value)};u.prototype.stepContinueStatement=function(a,b,c){$c(this,2,void 0,c.label&&c.label.name)};u.prototype.stepDebuggerStatement=function(a){a.pop()};
u.prototype.stepDoWhileStatement=function(a,b,c){"DoWhileStatement"===c.type&&void 0===b.W&&(b.value=!0,b.W=!0);if(!b.W)return b.W=!0,new y(c.test,b.scope);if(!b.value)a.pop();else if(c.body)return b.W=!1,b.P=!0,new y(c.body,b.scope)};u.prototype.stepEmptyStatement=function(a){a.pop()};u.prototype.stepEvalProgram_=function(a,b,c){var d=b.s||0;if(c=c.body[d])return b.s=d+1,new y(c,b.scope);a.pop();a[a.length-1].value=this.value};
u.prototype.stepExpressionStatement=function(a,b,c){if(!b.N)return b.N=!0,new y(c.expression,b.scope);a.pop();this.value=b.value};
u.prototype.stepForInStatement=function(a,b,c){if(!b.Bb&&(b.Bb=!0,c.left.declarations&&c.left.declarations[0].init))return b.scope.H&&J(this,this.fa,"for-in loop variable declaration may not have an initializer."),new y(c.left,b.scope);if(!b.ra)return b.ra=!0,b.da||(b.da=b.value),new y(c.right,b.scope);b.P||(b.P=!0,b.i=b.value,b.Va=Object.create(null));if(void 0===b.Ea)a:for(;;){if(b.i&&b.i.o)for(b.na||(b.na=Object.getOwnPropertyNames(b.i.a));;){var d=b.na.shift();if(void 0===d)break;if(Object.prototype.hasOwnProperty.call(b.i.a,
d)&&!b.Va[d]&&(b.Va[d]=!0,Object.prototype.propertyIsEnumerable.call(b.i.a,d))){b.Ea=d;break a}}else if(null!==b.i&&void 0!==b.i)for(b.na||(b.na=Object.getOwnPropertyNames(b.i));;){d=b.na.shift();if(void 0===d)break;b.Va[d]=!0;if(Object.prototype.propertyIsEnumerable.call(b.i,d)){b.Ea=d;break a}}b.i=uc(this,b.i);b.na=null;if(null===b.i){a.pop();return}}if(!b.fb)if(b.fb=!0,a=c.left,"VariableDeclaration"===a.type)b.da=[Ba,a.declarations[0].id.name];else return b.da=null,b=new y(a,b.scope),b.ia=!0,b;
b.da||(b.da=b.value);if(!b.ka&&(b.ka=!0,a=b.Ea,d=Zc(this,b.da,a)))return bd(this,d,b.da,a);b.Ea=void 0;b.fb=!1;b.ka=!1;if(c.body)return new y(c.body,b.scope)};u.prototype.stepForStatement=function(a,b,c){var d=b.ba||0;if(0===d){if(b.ba=1,c.init)return new y(c.init,b.scope)}else if(1===d){if(b.ba=2,c.test)return new y(c.test,b.scope)}else if(2===d)if(b.ba=3,c.test&&!b.value)a.pop();else return b.P=!0,new y(c.body,b.scope);else if(3===d&&(b.ba=1,c.update))return new y(c.update,b.scope)};
u.prototype.stepFunctionDeclaration=function(a){a.pop()};u.prototype.stepFunctionExpression=function(a,b,c){a.pop();a[a.length-1].value=Uc(this,c,b.scope)};u.prototype.stepIdentifier=function(a,b,c){a.pop();if(b.ia)a[a.length-1].value=[Ba,c.name];else{var d=Wc(this,c.name);if(d&&"object"===typeof d&&d.L){d.L=!1;for(a=b.scope;!xc(this,a,c.name);)a=a.ca;return ad(this,d,this.global)}a[a.length-1].value=d}};u.prototype.stepIfStatement=u.prototype.stepConditionalExpression;
u.prototype.stepLabeledStatement=function(a,b,c){a.pop();a=b.labels||[];a.push(c.label.name);b=new y(c.body,b.scope);b.labels=a;return b};u.prototype.stepLiteral=function(a,b,c){a.pop();b=c.value;b instanceof RegExp&&(c=this.g(this.Aa),Sc(this,c,b),b=c);a[a.length-1].value=b};
u.prototype.stepLogicalExpression=function(a,b,c){if("&&"!==c.operator&&"||"!==c.operator)throw SyntaxError("Unknown logical operator: "+c.operator);if(!b.Y)return b.Y=!0,new y(c.left,b.scope);if(b.sa)a.pop(),a[a.length-1].value=b.value;else if("&&"===c.operator&&!b.value||"||"===c.operator&&b.value)a.pop(),a[a.length-1].value=b.value;else return b.sa=!0,new y(c.right,b.scope)};
u.prototype.stepMemberExpression=function(a,b,c){if(!b.ra)return b.ra=!0,new y(c.object,b.scope);if(c.computed)if(b.Cb)c=b.value;else return b.i=b.value,b.Cb=!0,new y(c.property,b.scope);else b.i=b.value,c=c.property.name;a.pop();if(b.ia)a[a.length-1].value=[b.i,c];else{if((c=this.v(b.i,c))&&"object"===typeof c&&c.L)return c.L=!1,ad(this,c,b.i);a[a.length-1].value=c}};u.prototype.stepNewExpression=u.prototype.stepCallExpression;
u.prototype.stepObjectExpression=function(a,b,c){var d=b.s||0,e=c.properties[d];if(b.i){var g=e.key;if("Identifier"===g.type)var l=g.name;else if("Literal"===g.type)l=g.value;else throw SyntaxError("Unknown object structure: "+g.type);b.za[l]||(b.za[l]={});b.za[l][e.kind]=b.value;b.s=++d;e=c.properties[d]}else b.i=this.g(this.G),b.za=Object.create(null);if(e)return new y(e.value,b.scope);for(g in b.za)c=b.za[g],"get"in c||"set"in c?this.setProperty(b.i,g,Ha,{configurable:!0,enumerable:!0,get:c.get,
set:c.set}):this.setProperty(b.i,g,c.init);a.pop();a[a.length-1].value=b.i};u.prototype.stepProgram=function(a,b,c){if(a=c.body.shift())return b.done=!1,new y(a,b.scope);b.done=!0};u.prototype.stepReturnStatement=function(a,b,c){if(c.argument&&!b.N)return b.N=!0,new y(c.argument,b.scope);$c(this,3,b.value,void 0)};u.prototype.stepSequenceExpression=function(a,b,c){var d=b.s||0;if(c=c.expressions[d])return b.s=d+1,new y(c,b.scope);a.pop();a[a.length-1].value=b.value};
u.prototype.stepSwitchStatement=function(a,b,c){if(!b.W)return b.W=1,new y(c.discriminant,b.scope);1===b.W&&(b.W=2,b.Nb=b.value,b.Na=-1);for(;;){var d=b.Qa||0,e=c.cases[d];if(b.wa||!e||e.test)if(e||b.wa||-1===b.Na)if(e){if(!b.wa&&!b.ob&&e.test)return b.ob=!0,new y(e.test,b.scope);if(b.wa||b.value===b.Nb){b.wa=!0;var g=b.s||0;if(e.consequent[g])return b.Hb=!0,b.s=g+1,new y(e.consequent[g],b.scope)}b.ob=!1;b.s=0;b.Qa=d+1}else{a.pop();break}else b.wa=!0,b.Qa=b.Na;else b.Na=d,b.Qa=d+1}};
u.prototype.stepThisExpression=function(a){a.pop();a[a.length-1].value=Wc(this,"this")};u.prototype.stepThrowStatement=function(a,b,c){if(b.N)J(this,b.value);else return b.N=!0,new y(c.argument,b.scope)};
u.prototype.stepTryStatement=function(a,b,c){if(!b.xb)return b.xb=!0,new y(c.block,b.scope);if(b.U&&4===b.U.type&&!b.Ab&&c.handler)return b.Ab=!0,a=new y(c.handler,b.scope),a.Ob=b.U.value,b.U=void 0,a;if(!b.zb&&c.finalizer)return b.zb=!0,new y(c.finalizer,b.scope);a.pop();b.U&&$c(this,b.U.type,b.U.value,b.U.label)};
u.prototype.stepUnaryExpression=function(a,b,c){if(!b.N)return b.N=!0,a=new y(c.argument,b.scope),a.ia="delete"===c.operator,a;a.pop();var d=b.value;if("-"===c.operator)d=-d;else if("+"===c.operator)d=+d;else if("!"===c.operator)d=!d;else if("~"===c.operator)d=~d;else if("delete"===c.operator){c=!0;if(Array.isArray(d)){var e=d[0];e===Ba&&(e=b.scope);d=String(d[1]);try{delete e.a[d]}catch(g){b.scope.H?J(this,this.h,"Cannot delete property '"+d+"' of '"+e+"'"):c=!1}}d=c}else if("typeof"===c.operator)d=
d&&"Function"===d.K?"function":typeof d;else if("void"===c.operator)d=void 0;else throw SyntaxError("Unknown unary operator: "+c.operator);a[a.length-1].value=d};
u.prototype.stepUpdateExpression=function(a,b,c){if(!b.Y)return b.Y=!0,a=new y(c.argument,b.scope),a.ia=!0,a;b.va||(b.va=b.value);b.qa&&(b.$=b.value);if(!b.qa){var d=Yc(this,b.va);if((b.$=d)&&"object"===typeof d&&d.L)return d.L=!1,b.qa=!0,ad(this,d,b.va)}if(b.ka)a.pop(),a[a.length-1].value=b.Ua;else{d=Number(b.$);if("++"===c.operator)var e=d+1;else if("--"===c.operator)e=d-1;else throw SyntaxError("Unknown update expression: "+c.operator);c=c.prefix?e:d;if(d=Zc(this,b.va,e))return b.ka=!0,b.Ua=c,
bd(this,d,b.va,e);a.pop();a[a.length-1].value=c}};u.prototype.stepVariableDeclaration=function(a,b,c){c=c.declarations;var d=b.s||0,e=c[d];b.jb&&e&&(Xc(this,e.id.name,b.value),b.jb=!1,e=c[++d]);for(;e;){if(e.init)return b.s=d,b.jb=!0,new y(e.init,b.scope);e=c[++d]}a.pop()};u.prototype.stepWithStatement=function(a,b,c){if(b.ra)if(b.yb)a.pop();else return b.yb=!0,a=Vc(this,b.scope,b.value),new y(c.body,a);else return b.ra=!0,new y(c.object,b.scope)};u.prototype.stepWhileStatement=u.prototype.stepDoWhileStatement;
this.Interpreter=u;u.prototype.step=u.prototype.step;u.prototype.run=u.prototype.lb;u.prototype.appendCode=u.prototype.sb;u.prototype.createObject=u.prototype.pa;u.prototype.createObjectProto=u.prototype.g;u.prototype.createAsyncFunction=u.prototype.bb;u.prototype.createNativeFunction=u.prototype.b;u.prototype.getProperty=u.prototype.v;u.prototype.setProperty=u.prototype.setProperty;u.prototype.nativeToPseudo=u.prototype.la;u.prototype.pseudoToNative=u.prototype.M;u.prototype.createPrimitive=function(a){return a};
