eval5/umd/eval5.min.js

A JavaScript interpreter written in JavaScript

/*!
 * @license eval5 v1.4.8
 * Copyright (c) 2019-2020 nobo (MIT Licensed)
 * https://github.com/bplok20010/eval5
 */
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this.type===_.name&&this.value===t&&!this.containsEsc},q.eatContextual=function(t){return!!this.isContextual(t)&&(this.next(),!0)},q.expectContextual=function(t){this.eatContextual(t)||this.unexpected()},q.canInsertSemicolon=function(){return this.type===_.eof||this.type===_.braceR||E.test(this.input.slice(this.lastTokEnd,this.start))},q.insertSemicolon=function(){if(this.canInsertSemicolon())return this.options.onInsertedSemicolon&&this.options.onInsertedSemicolon(this.lastTokEnd,this.lastTokEndLoc),!0},q.semicolon=function(){this.eat(_.semi)||this.insertSemicolon()||this.unexpected()},q.afterTrailingComma=function(t,e){if(this.type===t)return this.options.onTrailingComma&&this.options.onTrailingComma(this.lastTokStart,this.lastTokStartLoc),e||this.next(),!0},q.expect=function(t){this.eat(t)||this.unexpected()},q.unexpected=function(t){this.raise(null!=t?t:this.start,"Unexpected 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Q=j.prototype;Q.parseTopLevel=function(t){var e={};for(t.body||(t.body=[]);this.type!==_.eof;){var r=this.parseStatement(null,!0,e);t.body.push(r)}if(this.inModule)for(var i=0,s=Object.keys(this.undefinedExports);i<s.length;i+=1){var n=s[i];this.raiseRecoverable(this.undefinedExports[n].start,"Export '"+n+"' is not defined")}return this.adaptDirectivePrologue(t.body),this.next(),t.sourceType=this.options.sourceType,this.finishNode(t,"Program")};var K={kind:"loop"},X={kind:"switch"};Q.isLet=function(t){if(this.options.ecmaVersion<6||!this.isContextual("let"))return!1;T.lastIndex=this.pos;var e=T.exec(this.input),r=this.pos+e[0].length,i=this.input.charCodeAt(r);if(91===i)return!0;if(t)return!1;if(123===i)return!0;if(g(i,!0)){for(var s=r+1;x(this.input.charCodeAt(s),!0);)++s;var n=this.input.slice(r,s);if(!h.test(n))return!0}return!1},Q.isAsyncFunction=function(){if(this.options.ecmaVersion<8||!this.isContextual("async"))return!1;T.lastIndex=this.pos;var t=T.exec(this.input),e=this.pos+t[0].length;return!(E.test(this.input.slice(this.pos,e))||"function"!==this.input.slice(e,e+8)||e+8!==this.input.length&&x(this.input.charAt(e+8)))},Q.parseStatement=function(t,e,r){var i,s=this.type,n=this.startNode();switch(this.isLet(t)&&(s=_._var,i="let"),s){case _._break:case _._continue:return this.parseBreakContinueStatement(n,s.keyword);case _._debugger:return this.parseDebuggerStatement(n);case _._do:return this.parseDoStatement(n);case _._for:return this.parseForStatement(n);case _._function:return t&&(this.strict||"if"!==t&&"label"!==t)&&this.options.ecmaVersion>=6&&this.unexpected(),this.parseFunctionStatement(n,!1,!t);case _._class:return t&&this.unexpected(),this.parseClass(n,!0);case _._if:return this.parseIfStatement(n);case _._return:return this.parseReturnStatement(n);case _._switch:return this.parseSwitchStatement(n);case _._throw:return this.parseThrowStatement(n);case _._try:return this.parseTryStatement(n);case _._const:case _._var:return i=i||this.value,t&&"var"!==i&&this.unexpected(),this.parseVarStatement(n,i);case _._while:return this.parseWhileStatement(n);case _._with:return this.parseWithStatement(n);case _.braceL:return this.parseBlock(!0,n);case _.semi:return this.parseEmptyStatement(n);case _._export:case _._import:if(this.options.ecmaVersion>10&&s===_._import){T.lastIndex=this.pos;var a=T.exec(this.input),o=this.pos+a[0].length,h=this.input.charCodeAt(o);if(40===h||46===h)return this.parseExpressionStatement(n,this.parseExpression())}return this.options.allowImportExportEverywhere||(e||this.raise(this.start,"'import' and 'export' may only appear at the top level"),this.inModule||this.raise(this.start,"'import' and 'export' may appear only with 'sourceType: module'")),s===_._import?this.parseImport(n):this.parseExport(n,r);default:if(this.isAsyncFunction())return t&&this.unexpected(),this.next(),this.parseFunctionStatement(n,!0,!t);var c=this.value,p=this.parseExpression();return s===_.name&&"Identifier"===p.type&&this.eat(_.colon)?this.parseLabeledStatement(n,c,p,t):this.parseExpressionStatement(n,p)}},Q.parseBreakContinueStatement=function(t,e){var r="break"===e;this.next(),this.eat(_.semi)||this.insertSemicolon()?t.label=null:this.type!==_.name?this.unexpected():(t.label=this.parseIdent(),this.semicolon());for(var i=0;i<this.labels.length;++i){var s=this.labels[i];if(null==t.label||s.name===t.label.name){if(null!=s.kind&&(r||"loop"===s.kind))break;if(t.label&&r)break}}return i===this.labels.length&&this.raise(t.start,"Unsyntactic "+e),this.finishNode(t,r?"BreakStatement":"ContinueStatement")},Q.parseDebuggerStatement=function(t){return this.next(),this.semicolon(),this.finishNode(t,"DebuggerStatement")},Q.parseDoStatement=function(t){return this.next(),this.labels.push(K),t.body=this.parseStatement("do"),this.labels.pop(),this.expect(_._while),t.test=this.parseParenExpression(),this.options.ecmaVersion>=6?this.eat(_.semi):this.semicolon(),this.finishNode(t,"DoWhileStatement")},Q.parseForStatement=function(t){this.next();var e=this.options.ecmaVersion>=9&&(this.inAsync||!this.inFunction&&this.options.allowAwaitOutsideFunction)&&this.eatContextual("await")?this.lastTokStart:-1;if(this.labels.push(K),this.enterScope(0),this.expect(_.parenL),this.type===_.semi)return e>-1&&this.unexpected(e),this.parseFor(t,null);var r=this.isLet();if(this.type===_._var||this.type===_._const||r){var i=this.startNode(),s=r?"let":this.value;return this.next(),this.parseVar(i,!0,s),this.finishNode(i,"VariableDeclaration"),(this.type===_._in||this.options.ecmaVersion>=6&&this.isContextual("of"))&&1===i.declarations.length?(this.options.ecmaVersion>=9&&(this.type===_._in?e>-1&&this.unexpected(e):t.await=e>-1),this.parseForIn(t,i)):(e>-1&&this.unexpected(e),this.parseFor(t,i))}var n=new z,a=this.parseExpression(!0,n);return this.type===_._in||this.options.ecmaVersion>=6&&this.isContextual("of")?(this.options.ecmaVersion>=9&&(this.type===_._in?e>-1&&this.unexpected(e):t.await=e>-1),this.toAssignable(a,!1,n),this.checkLVal(a),this.parseForIn(t,a)):(this.checkExpressionErrors(n,!0),e>-1&&this.unexpected(e),this.parseFor(t,a))},Q.parseFunctionStatement=function(t,e,r){return this.next(),this.parseFunction(t,Z|(r?0:J),!1,e)},Q.parseIfStatement=function(t){return this.next(),t.test=this.parseParenExpression(),t.consequent=this.parseStatement("if"),t.alternate=this.eat(_._else)?this.parseStatement("if"):null,this.finishNode(t,"IfStatement")},Q.parseReturnStatement=function(t){return this.inFunction||this.options.allowReturnOutsideFunction||this.raise(this.start,"'return' outside of function"),this.next(),this.eat(_.semi)||this.insertSemicolon()?t.argument=null:(t.argument=this.parseExpression(),this.semicolon()),this.finishNode(t,"ReturnStatement")},Q.parseSwitchStatement=function(t){var e;this.next(),t.discriminant=this.parseParenExpression(),t.cases=[],this.expect(_.braceL),this.labels.push(X),this.enterScope(0);for(var r=!1;this.type!==_.braceR;)if(this.type===_._case||this.type===_._default){var i=this.type===_._case;e&&this.finishNode(e,"SwitchCase"),t.cases.push(e=this.startNode()),e.consequent=[],this.next(),i?e.test=this.parseExpression():(r&&this.raiseRecoverable(this.lastTokStart,"Multiple default clauses"),r=!0,e.test=null),this.expect(_.colon)}else e||this.unexpected(),e.consequent.push(this.parseStatement(null));return this.exitScope(),e&&this.finishNode(e,"SwitchCase"),this.next(),this.labels.pop(),this.finishNode(t,"SwitchStatement")},Q.parseThrowStatement=function(t){return this.next(),E.test(this.input.slice(this.lastTokEnd,this.start))&&this.raise(this.lastTokEnd,"Illegal newline after throw"),t.argument=this.parseExpression(),this.semicolon(),this.finishNode(t,"ThrowStatement")};var Y=[];Q.parseTryStatement=function(t){if(this.next(),t.block=this.parseBlock(),t.handler=null,this.type===_._catch){var e=this.startNode();if(this.next(),this.eat(_.parenL)){e.param=this.parseBindingAtom();var r="Identifier"===e.param.type;this.enterScope(r?32:0),this.checkLVal(e.param,r?4:2),this.expect(_.parenR)}else this.options.ecmaVersion<10&&this.unexpected(),e.param=null,this.enterScope(0);e.body=this.parseBlock(!1),this.exitScope(),t.handler=this.finishNode(e,"CatchClause")}return t.finalizer=this.eat(_._finally)?this.parseBlock():null,t.handler||t.finalizer||this.raise(t.start,"Missing catch or finally clause"),this.finishNode(t,"TryStatement")},Q.parseVarStatement=function(t,e){return this.next(),this.parseVar(t,!1,e),this.semicolon(),this.finishNode(t,"VariableDeclaration")},Q.parseWhileStatement=function(t){return this.next(),t.test=this.parseParenExpression(),this.labels.push(K),t.body=this.parseStatement("while"),this.labels.pop(),this.finishNode(t,"WhileStatement")},Q.parseWithStatement=function(t){return this.strict&&this.raise(this.start,"'with' in strict mode"),this.next(),t.object=this.parseParenExpression(),t.body=this.parseStatement("with"),this.finishNode(t,"WithStatement")},Q.parseEmptyStatement=function(t){return this.next(),this.finishNode(t,"EmptyStatement")},Q.parseLabeledStatement=function(t,e,r,i){for(var s=0,n=this.labels;s<n.length;s+=1){n[s].name===e&&this.raise(r.start,"Label '"+e+"' is already declared")}for(var a=this.type.isLoop?"loop":this.type===_._switch?"switch":null,o=this.labels.length-1;o>=0;o--){var h=this.labels[o];if(h.statementStart!==t.start)break;h.statementStart=this.start,h.kind=a}return this.labels.push({name:e,kind:a,statementStart:this.start}),t.body=this.parseStatement(i?-1===i.indexOf("label")?i+"label":i:"label"),this.labels.pop(),t.label=r,this.finishNode(t,"LabeledStatement")},Q.parseExpressionStatement=function(t,e){return t.expression=e,this.semicolon(),this.finishNode(t,"ExpressionStatement")},Q.parseBlock=function(t,e,r){for(void 0===t&&(t=!0),void 0===e&&(e=this.startNode()),e.body=[],this.expect(_.braceL),t&&this.enterScope(0);this.type!==_.braceR;){var i=this.parseStatement(null);e.body.push(i)}return r&&(this.strict=!1),this.next(),t&&this.exitScope(),this.finishNode(e,"BlockStatement")},Q.parseFor=function(t,e){return t.init=e,this.expect(_.semi),t.test=this.type===_.semi?null:this.parseExpression(),this.expect(_.semi),t.update=this.type===_.parenR?null:this.parseExpression(),this.expect(_.parenR),t.body=this.parseStatement("for"),this.exitScope(),this.labels.pop(),this.finishNode(t,"ForStatement")},Q.parseForIn=function(t,e){var r=this.type===_._in;return this.next(),"VariableDeclaration"===e.type&&null!=e.declarations[0].init&&(!r||this.options.ecmaVersion<8||this.strict||"var"!==e.kind||"Identifier"!==e.declarations[0].id.type)?this.raise(e.start,(r?"for-in":"for-of")+" loop variable declaration may not have an initializer"):"AssignmentPattern"===e.type&&this.raise(e.start,"Invalid left-hand side in for-loop"),t.left=e,t.right=r?this.parseExpression():this.parseMaybeAssign(),this.expect(_.parenR),t.body=this.parseStatement("for"),this.exitScope(),this.labels.pop(),this.finishNode(t,r?"ForInStatement":"ForOfStatement")},Q.parseVar=function(t,e,r){for(t.declarations=[],t.kind=r;;){var i=this.startNode();if(this.parseVarId(i,r),this.eat(_.eq)?i.init=this.parseMaybeAssign(e):"const"!==r||this.type===_._in||this.options.ecmaVersion>=6&&this.isContextual("of")?"Identifier"===i.id.type||e&&(this.type===_._in||this.isContextual("of"))?i.init=null:this.raise(this.lastTokEnd,"Complex binding patterns require an initialization value"):this.unexpected(),t.declarations.push(this.finishNode(i,"VariableDeclarator")),!this.eat(_.comma))break}return t},Q.parseVarId=function(t,e){t.id=this.parseBindingAtom(),this.checkLVal(t.id,"var"===e?1:2,!1)};var Z=1,J=2;Q.parseFunction=function(t,e,r,i){this.initFunction(t),(this.options.ecmaVersion>=9||this.options.ecmaVersion>=6&&!i)&&(this.type===_.star&&e&J&&this.unexpected(),t.generator=this.eat(_.star)),this.options.ecmaVersion>=8&&(t.async=!!i),e&Z&&(t.id=4&e&&this.type!==_.name?null:this.parseIdent(),!t.id||e&J||this.checkLVal(t.id,this.strict||t.generator||t.async?this.treatFunctionsAsVar?1:2:3));var s=this.yieldPos,n=this.awaitPos,a=this.awaitIdentPos;return this.yieldPos=0,this.awaitPos=0,this.awaitIdentPos=0,this.enterScope(H(t.async,t.generator)),e&Z||(t.id=this.type===_.name?this.parseIdent():null),this.parseFunctionParams(t),this.parseFunctionBody(t,r,!1),this.yieldPos=s,this.awaitPos=n,this.awaitIdentPos=a,this.finishNode(t,e&Z?"FunctionDeclaration":"FunctionExpression")},Q.parseFunctionParams=function(t){this.expect(_.parenL),t.params=this.parseBindingList(_.parenR,!1,this.options.ecmaVersion>=8),this.checkYieldAwaitInDefaultParams()},Q.parseClass=function(t,e){this.next();var r=this.strict;this.strict=!0,this.parseClassId(t,e),this.parseClassSuper(t);var i=this.startNode(),s=!1;for(i.body=[],this.expect(_.braceL);this.type!==_.braceR;){var n=this.parseClassElement(null!==t.superClass);n&&(i.body.push(n),"MethodDefinition"===n.type&&"constructor"===n.kind&&(s&&this.raise(n.start,"Duplicate constructor in the same class"),s=!0))}return this.strict=r,this.next(),t.body=this.finishNode(i,"ClassBody"),this.finishNode(t,e?"ClassDeclaration":"ClassExpression")},Q.parseClassElement=function(t){var e=this;if(this.eat(_.semi))return null;var r=this.startNode(),i=function(t,i){void 0===i&&(i=!1);var s=e.start,n=e.startLoc;return!!e.eatContextual(t)&&(!(e.type===_.parenL||i&&e.canInsertSemicolon())||(r.key&&e.unexpected(),r.computed=!1,r.key=e.startNodeAt(s,n),r.key.name=t,e.finishNode(r.key,"Identifier"),!1))};r.kind="method",r.static=i("static");var s=this.eat(_.star),n=!1;s||(this.options.ecmaVersion>=8&&i("async",!0)?(n=!0,s=this.options.ecmaVersion>=9&&this.eat(_.star)):i("get")?r.kind="get":i("set")&&(r.kind="set")),r.key||this.parsePropertyName(r);var a=r.key,o=!1;return r.computed||r.static||!("Identifier"===a.type&&"constructor"===a.name||"Literal"===a.type&&"constructor"===a.value)?r.static&&"Identifier"===a.type&&"prototype"===a.name&&this.raise(a.start,"Classes may not have a static property named prototype"):("method"!==r.kind&&this.raise(a.start,"Constructor can't have get/set modifier"),s&&this.raise(a.start,"Constructor can't be a generator"),n&&this.raise(a.start,"Constructor can't be an async method"),r.kind="constructor",o=t),this.parseClassMethod(r,s,n,o),"get"===r.kind&&0!==r.value.params.length&&this.raiseRecoverable(r.value.start,"getter should have no params"),"set"===r.kind&&1!==r.value.params.length&&this.raiseRecoverable(r.value.start,"setter should have exactly one param"),"set"===r.kind&&"RestElement"===r.value.params[0].type&&this.raiseRecoverable(r.value.params[0].start,"Setter cannot use rest params"),r},Q.parseClassMethod=function(t,e,r,i){return t.value=this.parseMethod(e,r,i),this.finishNode(t,"MethodDefinition")},Q.parseClassId=function(t,e){this.type===_.name?(t.id=this.parseIdent(),e&&this.checkLVal(t.id,2,!1)):(!0===e&&this.unexpected(),t.id=null)},Q.parseClassSuper=function(t){t.superClass=this.eat(_._extends)?this.parseExprSubscripts():null},Q.parseExport=function(t,e){if(this.next(),this.eat(_.star))return this.options.ecmaVersion>=11&&(this.eatContextual("as")?(t.exported=this.parseIdent(!0),this.checkExport(e,t.exported.name,this.lastTokStart)):t.exported=null),this.expectContextual("from"),this.type!==_.string&&this.unexpected(),t.source=this.parseExprAtom(),this.semicolon(),this.finishNode(t,"ExportAllDeclaration");if(this.eat(_._default)){var r;if(this.checkExport(e,"default",this.lastTokStart),this.type===_._function||(r=this.isAsyncFunction())){var i=this.startNode();this.next(),r&&this.next(),t.declaration=this.parseFunction(i,4|Z,!1,r)}else if(this.type===_._class){var s=this.startNode();t.declaration=this.parseClass(s,"nullableID")}else t.declaration=this.parseMaybeAssign(),this.semicolon();return this.finishNode(t,"ExportDefaultDeclaration")}if(this.shouldParseExportStatement())t.declaration=this.parseStatement(null),"VariableDeclaration"===t.declaration.type?this.checkVariableExport(e,t.declaration.declarations):this.checkExport(e,t.declaration.id.name,t.declaration.id.start),t.specifiers=[],t.source=null;else{if(t.declaration=null,t.specifiers=this.parseExportSpecifiers(e),this.eatContextual("from"))this.type!==_.string&&this.unexpected(),t.source=this.parseExprAtom();else{for(var n=0,a=t.specifiers;n<a.length;n+=1){var o=a[n];this.checkUnreserved(o.local),this.checkLocalExport(o.local)}t.source=null}this.semicolon()}return this.finishNode(t,"ExportNamedDeclaration")},Q.checkExport=function(t,e,r){t&&(L(t,e)&&this.raiseRecoverable(r,"Duplicate export '"+e+"'"),t[e]=!0)},Q.checkPatternExport=function(t,e){var r=e.type;if("Identifier"===r)this.checkExport(t,e.name,e.start);else if("ObjectPattern"===r)for(var i=0,s=e.properties;i<s.length;i+=1){var n=s[i];this.checkPatternExport(t,n)}else if("ArrayPattern"===r)for(var a=0,o=e.elements;a<o.length;a+=1){var h=o[a];h&&this.checkPatternExport(t,h)}else"Property"===r?this.checkPatternExport(t,e.value):"AssignmentPattern"===r?this.checkPatternExport(t,e.left):"RestElement"===r?this.checkPatternExport(t,e.argument):"ParenthesizedExpression"===r&&this.checkPatternExport(t,e.expression)},Q.checkVariableExport=function(t,e){if(t)for(var r=0,i=e;r<i.length;r+=1){var s=i[r];this.checkPatternExport(t,s.id)}},Q.shouldParseExportStatement=function(){return"var"===this.type.keyword||"const"===this.type.keyword||"class"===this.type.keyword||"function"===this.type.keyword||this.isLet()||this.isAsyncFunction()},Q.parseExportSpecifiers=function(t){var e=[],r=!0;for(this.expect(_.braceL);!this.eat(_.braceR);){if(r)r=!1;else if(this.expect(_.comma),this.afterTrailingComma(_.braceR))break;var i=this.startNode();i.local=this.parseIdent(!0),i.exported=this.eatContextual("as")?this.parseIdent(!0):i.local,this.checkExport(t,i.exported.name,i.exported.start),e.push(this.finishNode(i,"ExportSpecifier"))}return e},Q.parseImport=function(t){return this.next(),this.type===_.string?(t.specifiers=Y,t.source=this.parseExprAtom()):(t.specifiers=this.parseImportSpecifiers(),this.expectContextual("from"),t.source=this.type===_.string?this.parseExprAtom():this.unexpected()),this.semicolon(),this.finishNode(t,"ImportDeclaration")},Q.parseImportSpecifiers=function(){var t=[],e=!0;if(this.type===_.name){var r=this.startNode();if(r.local=this.parseIdent(),this.checkLVal(r.local,2),t.push(this.finishNode(r,"ImportDefaultSpecifier")),!this.eat(_.comma))return t}if(this.type===_.star){var i=this.startNode();return this.next(),this.expectContextual("as"),i.local=this.parseIdent(),this.checkLVal(i.local,2),t.push(this.finishNode(i,"ImportNamespaceSpecifier")),t}for(this.expect(_.braceL);!this.eat(_.braceR);){if(e)e=!1;else if(this.expect(_.comma),this.afterTrailingComma(_.braceR))break;var s=this.startNode();s.imported=this.parseIdent(!0),this.eatContextual("as")?s.local=this.parseIdent():(this.checkUnreserved(s.imported),s.local=s.imported),this.checkLVal(s.local,2),t.push(this.finishNode(s,"ImportSpecifier"))}return t},Q.adaptDirectivePrologue=function(t){for(var e=0;e<t.length&&this.isDirectiveCandidate(t[e]);++e)t[e].directive=t[e].expression.raw.slice(1,-1)},Q.isDirectiveCandidate=function(t){return"ExpressionStatement"===t.type&&"Literal"===t.expression.type&&"string"==typeof t.expression.value&&('"'===this.input[t.start]||"'"===this.input[t.start])};var $=j.prototype;$.toAssignable=function(t,e,r){if(this.options.ecmaVersion>=6&&t)switch(t.type){case"Identifier":this.inAsync&&"await"===t.name&&this.raise(t.start,"Cannot use 'await' as identifier inside an async function");break;case"ObjectPattern":case"ArrayPattern":case"RestElement":break;case"ObjectExpression":t.type="ObjectPattern",r&&this.checkPatternErrors(r,!0);for(var i=0,s=t.properties;i<s.length;i+=1){var n=s[i];this.toAssignable(n,e),"RestElement"!==n.type||"ArrayPattern"!==n.argument.type&&"ObjectPattern"!==n.argument.type||this.raise(n.argument.start,"Unexpected token")}break;case"Property":"init"!==t.kind&&this.raise(t.key.start,"Object pattern can't contain getter or setter"),this.toAssignable(t.value,e);break;case"ArrayExpression":t.type="ArrayPattern",r&&this.checkPatternErrors(r,!0),this.toAssignableList(t.elements,e);break;case"SpreadElement":t.type="RestElement",this.toAssignable(t.argument,e),"AssignmentPattern"===t.argument.type&&this.raise(t.argument.start,"Rest elements cannot have a default value");break;case"AssignmentExpression":"="!==t.operator&&this.raise(t.left.end,"Only '=' operator can be used for specifying default value."),t.type="AssignmentPattern",delete t.operator,this.toAssignable(t.left,e);case"AssignmentPattern":break;case"ParenthesizedExpression":this.toAssignable(t.expression,e,r);break;case"ChainExpression":this.raiseRecoverable(t.start,"Optional chaining cannot appear in left-hand side");break;case"MemberExpression":if(!e)break;default:this.raise(t.start,"Assigning to rvalue")}else r&&this.checkPatternErrors(r,!0);return t},$.toAssignableList=function(t,e){for(var r=t.length,i=0;i<r;i++){var s=t[i];s&&this.toAssignable(s,e)}if(r){var n=t[r-1];6===this.options.ecmaVersion&&e&&n&&"RestElement"===n.type&&"Identifier"!==n.argument.type&&this.unexpected(n.argument.start)}return t},$.parseSpread=function(t){var e=this.startNode();return this.next(),e.argument=this.parseMaybeAssign(!1,t),this.finishNode(e,"SpreadElement")},$.parseRestBinding=function(){var t=this.startNode();return this.next(),6===this.options.ecmaVersion&&this.type!==_.name&&this.unexpected(),t.argument=this.parseBindingAtom(),this.finishNode(t,"RestElement")},$.parseBindingAtom=function(){if(this.options.ecmaVersion>=6)switch(this.type){case _.bracketL:var t=this.startNode();return this.next(),t.elements=this.parseBindingList(_.bracketR,!0,!0),this.finishNode(t,"ArrayPattern");case _.braceL:return this.parseObj(!0)}return this.parseIdent()},$.parseBindingList=function(t,e,r){for(var i=[],s=!0;!this.eat(t);)if(s?s=!1:this.expect(_.comma),e&&this.type===_.comma)i.push(null);else{if(r&&this.afterTrailingComma(t))break;if(this.type===_.ellipsis){var n=this.parseRestBinding();this.parseBindingListItem(n),i.push(n),this.type===_.comma&&this.raise(this.start,"Comma is not permitted after the rest element"),this.expect(t);break}var a=this.parseMaybeDefault(this.start,this.startLoc);this.parseBindingListItem(a),i.push(a)}return i},$.parseBindingListItem=function(t){return t},$.parseMaybeDefault=function(t,e,r){if(r=r||this.parseBindingAtom(),this.options.ecmaVersion<6||!this.eat(_.eq))return r;var i=this.startNodeAt(t,e);return i.left=r,i.right=this.parseMaybeAssign(),this.finishNode(i,"AssignmentPattern")},$.checkLVal=function(t,e,r){switch(void 0===e&&(e=0),t.type){case"Identifier":2===e&&"let"===t.name&&this.raiseRecoverable(t.start,"let is disallowed as a lexically bound name"),this.strict&&this.reservedWordsStrictBind.test(t.name)&&this.raiseRecoverable(t.start,(e?"Binding ":"Assigning to ")+t.name+" in strict mode"),r&&(L(r,t.name)&&this.raiseRecoverable(t.start,"Argument name clash"),r[t.name]=!0),0!==e&&5!==e&&this.declareName(t.name,e,t.start);break;case"ChainExpression":this.raiseRecoverable(t.start,"Optional chaining cannot appear in left-hand side");break;case"MemberExpression":e&&this.raiseRecoverable(t.start,"Binding member expression");break;case"ObjectPattern":for(var i=0,s=t.properties;i<s.length;i+=1){var n=s[i];this.checkLVal(n,e,r)}break;case"Property":this.checkLVal(t.value,e,r);break;case"ArrayPattern":for(var a=0,o=t.elements;a<o.length;a+=1){var h=o[a];h&&this.checkLVal(h,e,r)}break;case"AssignmentPattern":this.checkLVal(t.left,e,r);break;case"RestElement":this.checkLVal(t.argument,e,r);break;case"ParenthesizedExpression":this.checkLVal(t.expression,e,r);break;default:this.raise(t.start,(e?"Binding":"Assigning to")+" rvalue")}};var tt=j.prototype;tt.checkPropClash=function(t,e,r){if(!(this.options.ecmaVersion>=9&&"SpreadElement"===t.type||this.options.ecmaVersion>=6&&(t.computed||t.method||t.shorthand))){var i,s=t.key;switch(s.type){case"Identifier":i=s.name;break;case"Literal":i=String(s.value);break;default:return}var n=t.kind;if(this.options.ecmaVersion>=6)"__proto__"===i&&"init"===n&&(e.proto&&(r?r.doubleProto<0&&(r.doubleProto=s.start):this.raiseRecoverable(s.start,"Redefinition of __proto__ property")),e.proto=!0);else{var a=e[i="$"+i];if(a)("init"===n?this.strict&&a.init||a.get||a.set:a.init||a[n])&&this.raiseRecoverable(s.start,"Redefinition of property");else a=e[i]={init:!1,get:!1,set:!1};a[n]=!0}}},tt.parseExpression=function(t,e){var r=this.start,i=this.startLoc,s=this.parseMaybeAssign(t,e);if(this.type===_.comma){var n=this.startNodeAt(r,i);for(n.expressions=[s];this.eat(_.comma);)n.expressions.push(this.parseMaybeAssign(t,e));return this.finishNode(n,"SequenceExpression")}return s},tt.parseMaybeAssign=function(t,e,r){if(this.isContextual("yield")){if(this.inGenerator)return this.parseYield(t);this.exprAllowed=!1}var i=!1,s=-1,n=-1;e?(s=e.parenthesizedAssign,n=e.trailingComma,e.parenthesizedAssign=e.trailingComma=-1):(e=new z,i=!0);var a=this.start,o=this.startLoc;this.type!==_.parenL&&this.type!==_.name||(this.potentialArrowAt=this.start);var h=this.parseMaybeConditional(t,e);if(r&&(h=r.call(this,h,a,o)),this.type.isAssign){var c=this.startNodeAt(a,o);return c.operator=this.value,c.left=this.type===_.eq?this.toAssignable(h,!1,e):h,i||(e.parenthesizedAssign=e.trailingComma=e.doubleProto=-1),e.shorthandAssign>=c.left.start&&(e.shorthandAssign=-1),this.checkLVal(h),this.next(),c.right=this.parseMaybeAssign(t),this.finishNode(c,"AssignmentExpression")}return i&&this.checkExpressionErrors(e,!0),s>-1&&(e.parenthesizedAssign=s),n>-1&&(e.trailingComma=n),h},tt.parseMaybeConditional=function(t,e){var r=this.start,i=this.startLoc,s=this.parseExprOps(t,e);if(this.checkExpressionErrors(e))return s;if(this.eat(_.question)){var n=this.startNodeAt(r,i);return n.test=s,n.consequent=this.parseMaybeAssign(),this.expect(_.colon),n.alternate=this.parseMaybeAssign(t),this.finishNode(n,"ConditionalExpression")}return s},tt.parseExprOps=function(t,e){var r=this.start,i=this.startLoc,s=this.parseMaybeUnary(e,!1);return this.checkExpressionErrors(e)||s.start===r&&"ArrowFunctionExpression"===s.type?s:this.parseExprOp(s,r,i,-1,t)},tt.parseExprOp=function(t,e,r,i,s){var n=this.type.binop;if(null!=n&&(!s||this.type!==_._in)&&n>i){var a=this.type===_.logicalOR||this.type===_.logicalAND,o=this.type===_.coalesce;o&&(n=_.logicalAND.binop);var h=this.value;this.next();var c=this.start,p=this.startLoc,u=this.parseExprOp(this.parseMaybeUnary(null,!1),c,p,n,s),l=this.buildBinary(e,r,t,u,h,a||o);return(a&&this.type===_.coalesce||o&&(this.type===_.logicalOR||this.type===_.logicalAND))&&this.raiseRecoverable(this.start,"Logical expressions and coalesce expressions cannot be mixed. Wrap either by parentheses"),this.parseExprOp(l,e,r,i,s)}return t},tt.buildBinary=function(t,e,r,i,s,n){var a=this.startNodeAt(t,e);return a.left=r,a.operator=s,a.right=i,this.finishNode(a,n?"LogicalExpression":"BinaryExpression")},tt.parseMaybeUnary=function(t,e){var r,i=this.start,s=this.startLoc;if(this.isContextual("await")&&(this.inAsync||!this.inFunction&&this.options.allowAwaitOutsideFunction))r=this.parseAwait(),e=!0;else if(this.type.prefix){var n=this.startNode(),a=this.type===_.incDec;n.operator=this.value,n.prefix=!0,this.next(),n.argument=this.parseMaybeUnary(null,!0),this.checkExpressionErrors(t,!0),a?this.checkLVal(n.argument):this.strict&&"delete"===n.operator&&"Identifier"===n.argument.type?this.raiseRecoverable(n.start,"Deleting local variable in strict mode"):e=!0,r=this.finishNode(n,a?"UpdateExpression":"UnaryExpression")}else{if(r=this.parseExprSubscripts(t),this.checkExpressionErrors(t))return r;for(;this.type.postfix&&!this.canInsertSemicolon();){var o=this.startNodeAt(i,s);o.operator=this.value,o.prefix=!1,o.argument=r,this.checkLVal(r),this.next(),r=this.finishNode(o,"UpdateExpression")}}return!e&&this.eat(_.starstar)?this.buildBinary(i,s,r,this.parseMaybeUnary(null,!1),"**",!1):r},tt.parseExprSubscripts=function(t){var e=this.start,r=this.startLoc,i=this.parseExprAtom(t);if("ArrowFunctionExpression"===i.type&&")"!==this.input.slice(this.lastTokStart,this.lastTokEnd))return i;var s=this.parseSubscripts(i,e,r);return t&&"MemberExpression"===s.type&&(t.parenthesizedAssign>=s.start&&(t.parenthesizedAssign=-1),t.parenthesizedBind>=s.start&&(t.parenthesizedBind=-1)),s},tt.parseSubscripts=function(t,e,r,i){for(var s=this.options.ecmaVersion>=8&&"Identifier"===t.type&&"async"===t.name&&this.lastTokEnd===t.end&&!this.canInsertSemicolon()&&t.end-t.start==5&&this.potentialArrowAt===t.start,n=!1;;){var a=this.parseSubscript(t,e,r,i,s,n);if(a.optional&&(n=!0),a===t||"ArrowFunctionExpression"===a.type){if(n){var o=this.startNodeAt(e,r);o.expression=a,a=this.finishNode(o,"ChainExpression")}return a}t=a}},tt.parseSubscript=function(t,e,r,i,s,n){var a=this.options.ecmaVersion>=11,o=a&&this.eat(_.questionDot);i&&o&&this.raise(this.lastTokStart,"Optional chaining cannot appear in the callee of new expressions");var h=this.eat(_.bracketL);if(h||o&&this.type!==_.parenL&&this.type!==_.backQuote||this.eat(_.dot)){var c=this.startNodeAt(e,r);c.object=t,c.property=h?this.parseExpression():this.parseIdent("never"!==this.options.allowReserved),c.computed=!!h,h&&this.expect(_.bracketR),a&&(c.optional=o),t=this.finishNode(c,"MemberExpression")}else if(!i&&this.eat(_.parenL)){var p=new z,u=this.yieldPos,l=this.awaitPos,d=this.awaitIdentPos;this.yieldPos=0,this.awaitPos=0,this.awaitIdentPos=0;var f=this.parseExprList(_.parenR,this.options.ecmaVersion>=8,!1,p);if(s&&!o&&!this.canInsertSemicolon()&&this.eat(_.arrow))return this.checkPatternErrors(p,!1),this.checkYieldAwaitInDefaultParams(),this.awaitIdentPos>0&&this.raise(this.awaitIdentPos,"Cannot use 'await' as identifier inside an async function"),this.yieldPos=u,this.awaitPos=l,this.awaitIdentPos=d,this.parseArrowExpression(this.startNodeAt(e,r),f,!0);this.checkExpressionErrors(p,!0),this.yieldPos=u||this.yieldPos,this.awaitPos=l||this.awaitPos,this.awaitIdentPos=d||this.awaitIdentPos;var m=this.startNodeAt(e,r);m.callee=t,m.arguments=f,a&&(m.optional=o),t=this.finishNode(m,"CallExpression")}else if(this.type===_.backQuote){(o||n)&&this.raise(this.start,"Optional chaining cannot appear in the tag of tagged template expressions");var g=this.startNodeAt(e,r);g.tag=t,g.quasi=this.parseTemplate({isTagged:!0}),t=this.finishNode(g,"TaggedTemplateExpression")}return t},tt.parseExprAtom=function(t){this.type===_.slash&&this.readRegexp();var e,r=this.potentialArrowAt===this.start;switch(this.type){case _._super:return this.allowSuper||this.raise(this.start,"'super' keyword outside a method"),e=this.startNode(),this.next(),this.type!==_.parenL||this.allowDirectSuper||this.raise(e.start,"super() call outside constructor of a subclass"),this.type!==_.dot&&this.type!==_.bracketL&&this.type!==_.parenL&&this.unexpected(),this.finishNode(e,"Super");case _._this:return e=this.startNode(),this.next(),this.finishNode(e,"ThisExpression");case _.name:var i=this.start,s=this.startLoc,n=this.containsEsc,a=this.parseIdent(!1);if(this.options.ecmaVersion>=8&&!n&&"async"===a.name&&!this.canInsertSemicolon()&&this.eat(_._function))return this.parseFunction(this.startNodeAt(i,s),0,!1,!0);if(r&&!this.canInsertSemicolon()){if(this.eat(_.arrow))return this.parseArrowExpression(this.startNodeAt(i,s),[a],!1);if(this.options.ecmaVersion>=8&&"async"===a.name&&this.type===_.name&&!n)return a=this.parseIdent(!1),!this.canInsertSemicolon()&&this.eat(_.arrow)||this.unexpected(),this.parseArrowExpression(this.startNodeAt(i,s),[a],!0)}return a;case _.regexp:var o=this.value;return(e=this.parseLiteral(o.value)).regex={pattern:o.pattern,flags:o.flags},e;case _.num:case _.string:return this.parseLiteral(this.value);case _._null:case _._true:case _._false:return(e=this.startNode()).value=this.type===_._null?null:this.type===_._true,e.raw=this.type.keyword,this.next(),this.finishNode(e,"Literal");case _.parenL:var h=this.start,c=this.parseParenAndDistinguishExpression(r);return t&&(t.parenthesizedAssign<0&&!this.isSimpleAssignTarget(c)&&(t.parenthesizedAssign=h),t.parenthesizedBind<0&&(t.parenthesizedBind=h)),c;case _.bracketL:return e=this.startNode(),this.next(),e.elements=this.parseExprList(_.bracketR,!0,!0,t),this.finishNode(e,"ArrayExpression");case _.braceL:return this.parseObj(!1,t);case _._function:return e=this.startNode(),this.next(),this.parseFunction(e,0);case _._class:return this.parseClass(this.startNode(),!1);case _._new:return this.parseNew();case _.backQuote:return this.parseTemplate();case _._import:return this.options.ecmaVersion>=11?this.parseExprImport():this.unexpected();default:this.unexpected()}},tt.parseExprImport=function(){var t=this.startNode();this.containsEsc&&this.raiseRecoverable(this.start,"Escape sequence in keyword import");var e=this.parseIdent(!0);switch(this.type){case _.parenL:return this.parseDynamicImport(t);case _.dot:return t.meta=e,this.parseImportMeta(t);default:this.unexpected()}},tt.parseDynamicImport=function(t){if(this.next(),t.source=this.parseMaybeAssign(),!this.eat(_.parenR)){var e=this.start;this.eat(_.comma)&&this.eat(_.parenR)?this.raiseRecoverable(e,"Trailing comma is not allowed in import()"):this.unexpected(e)}return this.finishNode(t,"ImportExpression")},tt.parseImportMeta=function(t){this.next();var e=this.containsEsc;return t.property=this.parseIdent(!0),"meta"!==t.property.name&&this.raiseRecoverable(t.property.start,"The only valid meta property for import is 'import.meta'"),e&&this.raiseRecoverable(t.start,"'import.meta' must not contain escaped characters"),"module"!==this.options.sourceType&&this.raiseRecoverable(t.start,"Cannot use 'import.meta' outside a module"),this.finishNode(t,"MetaProperty")},tt.parseLiteral=function(t){var e=this.startNode();return e.value=t,e.raw=this.input.slice(this.start,this.end),110===e.raw.charCodeAt(e.raw.length-1)&&(e.bigint=e.raw.slice(0,-1).replace(/_/g,"")),this.next(),this.finishNode(e,"Literal")},tt.parseParenExpression=function(){this.expect(_.parenL);var t=this.parseExpression();return this.expect(_.parenR),t},tt.parseParenAndDistinguishExpression=function(t){var e,r=this.start,i=this.startLoc,s=this.options.ecmaVersion>=8;if(this.options.ecmaVersion>=6){this.next();var n,a=this.start,o=this.startLoc,h=[],c=!0,p=!1,u=new z,l=this.yieldPos,d=this.awaitPos;for(this.yieldPos=0,this.awaitPos=0;this.type!==_.parenR;){if(c?c=!1:this.expect(_.comma),s&&this.afterTrailingComma(_.parenR,!0)){p=!0;break}if(this.type===_.ellipsis){n=this.start,h.push(this.parseParenItem(this.parseRestBinding())),this.type===_.comma&&this.raise(this.start,"Comma is not permitted after the rest element");break}h.push(this.parseMaybeAssign(!1,u,this.parseParenItem))}var f=this.start,m=this.startLoc;if(this.expect(_.parenR),t&&!this.canInsertSemicolon()&&this.eat(_.arrow))return this.checkPatternErrors(u,!1),this.checkYieldAwaitInDefaultParams(),this.yieldPos=l,this.awaitPos=d,this.parseParenArrowList(r,i,h);h.length&&!p||this.unexpected(this.lastTokStart),n&&this.unexpected(n),this.checkExpressionErrors(u,!0),this.yieldPos=l||this.yieldPos,this.awaitPos=d||this.awaitPos,h.length>1?((e=this.startNodeAt(a,o)).expressions=h,this.finishNodeAt(e,"SequenceExpression",f,m)):e=h[0]}else e=this.parseParenExpression();if(this.options.preserveParens){var g=this.startNodeAt(r,i);return g.expression=e,this.finishNode(g,"ParenthesizedExpression")}return e},tt.parseParenItem=function(t){return t},tt.parseParenArrowList=function(t,e,r){return this.parseArrowExpression(this.startNodeAt(t,e),r)};var et=[];tt.parseNew=function(){this.containsEsc&&this.raiseRecoverable(this.start,"Escape sequence in keyword new");var t=this.startNode(),e=this.parseIdent(!0);if(this.options.ecmaVersion>=6&&this.eat(_.dot)){t.meta=e;var r=this.containsEsc;return t.property=this.parseIdent(!0),"target"!==t.property.name&&this.raiseRecoverable(t.property.start,"The only valid meta property for new is 'new.target'"),r&&this.raiseRecoverable(t.start,"'new.target' must not contain escaped characters"),this.inNonArrowFunction()||this.raiseRecoverable(t.start,"'new.target' can only be used in functions"),this.finishNode(t,"MetaProperty")}var i=this.start,s=this.startLoc,n=this.type===_._import;return