// Acorn: Copyright 2012 Marijn Haverbeke, MIT License
const acorn = require("acorn");
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na=/[\n\r\u2028\u2029]/,Y=/\r\n|[\n\r\u2028\u2029]/g,la=a.isIdentifierStart=function(a){return 65>a?36===a:91>a?!0:97>a?95===a:123>a?!0:170<=a&&Za.test(String.fromCharCode(a))},ab=a.isIdentifierChar=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&&Pb.test(String.fromCharCode(a))},ca,Ia={kind:"loop"},Ob={kind:"switch"}};
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// JS-Interpreter: Copyright 2013 Google Inc, Apache 2.0
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d)&&!b.Ta[d]&&(b.Ta[d]=!0,Object.prototype.propertyIsEnumerable.call(b.i.a,d))){b.Da=d;break a}}else if(null!==b.i&&void 0!==b.i)for(b.ma||(b.ma=Object.getOwnPropertyNames(b.i));;){d=b.ma.shift();if(void 0===d)break;b.Ta[d]=!0;if(Object.prototype.propertyIsEnumerable.call(b.i,d)){b.Da=d;break a}}b.i=M(this,b.i);b.ma=null;if(null===b.i){a.pop();return}}if(!b.cb)if(b.cb=!0,a=c.left,"VariableDeclaration"===a.type)b.da=[Aa,a.declarations[0].id.name];else return b.da=null,b=new r(a,b.scope),b.ha=!0,b;
b.da||(b.da=b.value);if(!b.ja&&(b.ja=!0,a=b.Da,d=Kc(this,b.da,a)))return Nc(this,d,b.da,a);b.Da=void 0;b.cb=!1;b.ja=!1;if(c.body)return new r(c.body,b.scope)};m.prototype.stepForStatement=function(a,b,c){var d=b.aa||0;if(0===d){if(b.aa=1,c.init)return new r(c.init,b.scope)}else if(1===d){if(b.aa=2,c.test)return new r(c.test,b.scope)}else if(2===d)if(b.aa=3,c.test&&!b.value)a.pop();else return b.P=!0,new r(c.body,b.scope);else if(3===d&&(b.aa=1,c.update))return new r(c.update,b.scope)};
m.prototype.stepFunctionDeclaration=function(a){a.pop()};m.prototype.stepFunctionExpression=function(a,b,c){a.pop();a[a.length-1].value=Fc(this,c,b.scope)};m.prototype.stepIdentifier=function(a,b,c){a.pop();if(b.ha)a[a.length-1].value=[Aa,c.name];else{var d=Hc(this,c.name);if(d&&"object"===typeof d&&d.L){d.L=!1;for(a=b.scope;!Cc(this,a,c.name);)a=a.ba;return Mc(this,d,this.global)}a[a.length-1].value=d}};m.prototype.stepIfStatement=m.prototype.stepConditionalExpression;
m.prototype.stepLabeledStatement=function(a,b,c){a.pop();a=b.labels||[];a.push(c.label.name);b=new r(c.body,b.scope);b.labels=a;return b};m.prototype.stepLiteral=function(a,b,c){a.pop();b=c.value;b instanceof RegExp&&(c=this.g(this.za),Dc(this,c,b),b=c);a[a.length-1].value=b};
m.prototype.stepLogicalExpression=function(a,b,c){if("&&"!==c.operator&&"||"!==c.operator)throw SyntaxError("Unknown logical operator: "+c.operator);if(!b.X)return b.X=!0,new r(c.left,b.scope);if(b.ra)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.ra=!0,new r(c.right,b.scope)};
m.prototype.stepMemberExpression=function(a,b,c){if(!b.qa)return b.qa=!0,new r(c.object,b.scope);if(c.computed)if(b.Ab)c=b.value;else return b.i=b.value,b.Ab=!0,new r(c.property,b.scope);else b.i=b.value,c=c.property.name;a.pop();if(b.ha)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,Mc(this,c,b.i);a[a.length-1].value=c}};m.prototype.stepNewExpression=m.prototype.stepCallExpression;
m.prototype.stepObjectExpression=function(a,b,c){var d=b.s||0,e=c.properties[d];if(b.i){var f=e.key;if("Identifier"===f.type)var l=f.name;else if("Literal"===f.type)l=f.value;else throw SyntaxError("Unknown object structure: "+f.type);b.ya[l]||(b.ya[l]={});b.ya[l][e.kind]=b.value;b.s=++d;e=c.properties[d]}else b.i=this.g(this.F),b.ya=Object.create(null);if(e)return new r(e.value,b.scope);for(f in b.ya)c=b.ya[f],"get"in c||"set"in c?this.setProperty(b.i,f,null,{configurable:!0,enumerable:!0,get:c.get,
set:c.set}):this.setProperty(b.i,f,c.init);a.pop();a[a.length-1].value=b.i};m.prototype.stepProgram=function(a,b,c){if(a=c.body.shift())return b.done=!1,new r(a,b.scope);b.done=!0};m.prototype.stepReturnStatement=function(a,b,c){if(c.argument&&!b.N)return b.N=!0,new r(c.argument,b.scope);Lc(this,3,b.value,void 0)};m.prototype.stepSequenceExpression=function(a,b,c){var d=b.s||0;if(c=c.expressions[d])return b.s=d+1,new r(c,b.scope);a.pop();a[a.length-1].value=b.value};
m.prototype.stepSwitchStatement=function(a,b,c){if(!b.V)return b.V=1,new r(c.discriminant,b.scope);1===b.V&&(b.V=2,b.Lb=b.value,b.La=-1);for(;;){var d=b.Oa||0,e=c.cases[d];if(b.va||!e||e.test)if(e||b.va||-1===b.La)if(e){if(!b.va&&!b.mb&&e.test)return b.mb=!0,new r(e.test,b.scope);if(b.va||b.value===b.Lb){b.va=!0;var f=b.s||0;if(e.consequent[f])return b.Fb=!0,b.s=f+1,new r(e.consequent[f],b.scope)}b.mb=!1;b.s=0;b.Oa=d+1}else{a.pop();break}else b.va=!0,b.Oa=b.La;else b.La=d,b.Oa=d+1}};
m.prototype.stepThisExpression=function(a){a.pop();a[a.length-1].value=Hc(this,"this")};m.prototype.stepThrowStatement=function(a,b,c){if(b.N)E(this,b.value);else return b.N=!0,new r(c.argument,b.scope)};
m.prototype.stepTryStatement=function(a,b,c){if(!b.vb)return b.vb=!0,new r(c.block,b.scope);if(b.U&&4===b.U.type&&!b.yb&&c.handler)return b.yb=!0,a=new r(c.handler,b.scope),a.Mb=b.U.value,b.U=void 0,a;if(!b.xb&&c.finalizer)return b.xb=!0,new r(c.finalizer,b.scope);a.pop();b.U&&Lc(this,b.U.type,b.U.value,b.U.label)};
m.prototype.stepUnaryExpression=function(a,b,c){if(!b.N)return b.N=!0,a=new r(c.argument,b.scope),a.ha="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===Aa&&(e=b.scope);d=String(d[1]);try{delete e.a[d]}catch(f){b.scope.G?E(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};
m.prototype.stepUpdateExpression=function(a,b,c){if(!b.X)return b.X=!0,a=new r(c.argument,b.scope),a.ha=!0,a;b.ua||(b.ua=b.value);b.pa&&(b.Z=b.value);if(!b.pa){var d=Jc(this,b.ua);if((b.Z=d)&&"object"===typeof d&&d.L)return d.L=!1,b.pa=!0,Mc(this,d,b.ua)}if(b.ja)a.pop(),a[a.length-1].value=b.Sa;else{d=Number(b.Z);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=Kc(this,b.ua,e))return b.ja=!0,b.Sa=c,
Nc(this,d,b.ua,e);a.pop();a[a.length-1].value=c}};m.prototype.stepVariableDeclaration=function(a,b,c){c=c.declarations;var d=b.s||0,e=c[d];b.hb&&e&&(Ic(this,e.id.name,b.value),b.hb=!1,e=c[++d]);for(;e;){if(e.init)return b.s=d,b.hb=!0,new r(e.init,b.scope);e=c[++d]}a.pop()};m.prototype.stepWithStatement=function(a,b,c){if(b.qa)if(b.wb)a.pop();else return b.wb=!0,a=Gc(this,b.scope,b.value),new r(c.body,a);else return b.qa=!0,new r(c.object,b.scope)};m.prototype.stepWhileStatement=m.prototype.stepDoWhileStatement;
this.Interpreter=m;m.prototype.step=m.prototype.step;m.prototype.run=m.prototype.jb;m.prototype.appendCode=m.prototype.qb;m.prototype.createObject=m.prototype.oa;m.prototype.createObjectProto=m.prototype.g;m.prototype.createAsyncFunction=m.prototype.tb;m.prototype.createNativeFunction=m.prototype.b;m.prototype.getProperty=m.prototype.v;m.prototype.setProperty=m.prototype.setProperty;m.prototype.nativeToPseudo=m.prototype.ka;m.prototype.pseudoToNative=m.prototype.M;m.prototype.createPrimitive=function(a){return a};