next
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The React Framework
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JavaScript
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Q={inFunction:{configurable:true},inGenerator:{configurable:true},inAsync:{configurable:true},canAwait:{configurable:true},allowSuper:{configurable:true},allowDirectSuper:{configurable:true},treatFunctionsAsVar:{configurable:true},allowNewDotTarget:{configurable:true},inClassStaticBlock:{configurable:true}};K.prototype.parse=function parse(){var e=this.options.program||this.startNode();this.nextToken();return this.parseTopLevel(e)};Q.inFunction.get=function(){return(this.currentVarScope().flags&V)>0};Q.inGenerator.get=function(){return(this.currentVarScope().flags&R)>0&&!this.currentVarScope().inClassFieldInit};Q.inAsync.get=function(){return(this.currentVarScope().flags&L)>0&&!this.currentVarScope().inClassFieldInit};Q.canAwait.get=function(){for(var e=this.scopeStack.length-1;e>=0;e--){var t=this.scopeStack[e];if(t.inClassFieldInit||t.flags&F){return false}if(t.flags&V){return(t.flags&L)>0}}return this.inModule&&this.options.ecmaVersion>=13||this.options.allowAwaitOutsideFunction};Q.allowSuper.get=function(){var e=this.currentThisScope();var t=e.flags;var i=e.inClassFieldInit;return(t&B)>0||i||this.options.allowSuperOutsideMethod};Q.allowDirectSuper.get=function(){return(this.currentThisScope().flags&M)>0};Q.treatFunctionsAsVar.get=function(){return this.treatFunctionsAsVarInScope(this.currentScope())};Q.allowNewDotTarget.get=function(){var e=this.currentThisScope();var t=e.flags;var i=e.inClassFieldInit;return(t&(V|F))>0||i};Q.inClassStaticBlock.get=function(){return(this.currentVarScope().flags&F)>0};K.extend=function extend(){var e=[],t=arguments.length;while(t--)e[t]=arguments[t];var i=this;for(var s=0;s<e.length;s++){i=e[s](i)}return i};K.parse=function parse(e,t){return new this(t,e).parse()};K.parseExpressionAt=function parseExpressionAt(e,t,i){var s=new this(i,e,t);s.nextToken();return s.parseExpression()};K.tokenizer=function tokenizer(e,t){return new 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true};Y.expectContextual=function(e){if(!this.eatContextual(e)){this.unexpected()}};Y.canInsertSemicolon=function(){return this.type===m.eof||this.type===m.braceR||g.test(this.input.slice(this.lastTokEnd,this.start))};Y.insertSemicolon=function(){if(this.canInsertSemicolon()){if(this.options.onInsertedSemicolon){this.options.onInsertedSemicolon(this.lastTokEnd,this.lastTokEndLoc)}return true}};Y.semicolon=function(){if(!this.eat(m.semi)&&!this.insertSemicolon()){this.unexpected()}};Y.afterTrailingComma=function(e,t){if(this.type===e){if(this.options.onTrailingComma){this.options.onTrailingComma(this.lastTokStart,this.lastTokStartLoc)}if(!t){this.next()}return true}};Y.expect=function(e){this.eat(e)||this.unexpected()};Y.unexpected=function(e){this.raise(e!=null?e:this.start,"Unexpected token")};var Z=function 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m._function:if(e&&(this.strict||e!=="if"&&e!=="label")&&this.options.ecmaVersion>=6){this.unexpected()}return this.parseFunctionStatement(r,false,!e);case m._class:if(e){this.unexpected()}return this.parseClass(r,true);case m._if:return this.parseIfStatement(r);case m._return:return this.parseReturnStatement(r);case m._switch:return this.parseSwitchStatement(r);case m._throw:return this.parseThrowStatement(r);case m._try:return this.parseTryStatement(r);case m._const:case m._var:a=a||this.value;if(e&&a!=="var"){this.unexpected()}return this.parseVarStatement(r,a);case m._while:return this.parseWhileStatement(r);case m._with:return this.parseWithStatement(r);case m.braceL:return this.parseBlock(true,r);case m.semi:return this.parseEmptyStatement(r);case m._export:case m._import:if(this.options.ecmaVersion>10&&s===m._import){y.lastIndex=this.pos;var n=y.exec(this.input);var o=this.pos+n[0].length,h=this.input.charCodeAt(o);if(h===40||h===46){return this.parseExpressionStatement(r,this.parseExpression())}}if(!this.options.allowImportExportEverywhere){if(!t){this.raise(this.start,"'import' and 'export' may only appear at the top level")}if(!this.inModule){this.raise(this.start,"'import' and 'export' may appear only with 'sourceType: module'")}}return s===m._import?this.parseImport(r):this.parseExport(r,i);default:if(this.isAsyncFunction()){if(e){this.unexpected()}this.next();return this.parseFunctionStatement(r,true,!e)}var p=this.value,c=this.parseExpression();if(s===m.name&&c.type==="Identifier"&&this.eat(m.colon)){return this.parseLabeledStatement(r,p,c,e)}else{return this.parseExpressionStatement(r,c)}}};$.parseBreakContinueStatement=function(e,t){var i=t==="break";this.next();if(this.eat(m.semi)||this.insertSemicolon()){e.label=null}else if(this.type!==m.name){this.unexpected()}else{e.label=this.parseIdent();this.semicolon()}var s=0;for(;s<this.labels.length;++s){var r=this.labels[s];if(e.label==null||r.name===e.label.name){if(r.kind!=null&&(i||r.kind==="loop")){break}if(e.label&&i){break}}}if(s===this.labels.length){this.raise(e.start,"Unsyntactic "+t)}return this.finishNode(e,i?"BreakStatement":"ContinueStatement")};$.parseDebuggerStatement=function(e){this.next();this.semicolon();return this.finishNode(e,"DebuggerStatement")};$.parseDoStatement=function(e){this.next();this.labels.push(J);e.body=this.parseStatement("do");this.labels.pop();this.expect(m._while);e.test=this.parseParenExpression();if(this.options.ecmaVersion>=6){this.eat(m.semi)}else{this.semicolon()}return this.finishNode(e,"DoWhileStatement")};$.parseForStatement=function(e){this.next();var t=this.options.ecmaVersion>=9&&this.canAwait&&this.eatContextual("await")?this.lastTokStart:-1;this.labels.push(J);this.enterScope(0);this.expect(m.parenL);if(this.type===m.semi){if(t>-1){this.unexpected(t)}return this.parseFor(e,null)}var i=this.isLet();if(this.type===m._var||this.type===m._const||i){var s=this.startNode(),r=i?"let":this.value;this.next();this.parseVar(s,true,r);this.finishNode(s,"VariableDeclaration");if((this.type===m._in||this.options.ecmaVersion>=6&&this.isContextual("of"))&&s.declarations.length===1){if(this.options.ecmaVersion>=9){if(this.type===m._in){if(t>-1){this.unexpected(t)}}else{e.await=t>-1}}return this.parseForIn(e,s)}if(t>-1){this.unexpected(t)}return this.parseFor(e,s)}var a=this.isContextual("let"),n=false;var o=this.containsEsc;var h=new Z;var p=this.start;var c=t>-1?this.parseExprSubscripts(h,"await"):this.parseExpression(true,h);if(this.type===m._in||(n=this.options.ecmaVersion>=6&&this.isContextual("of"))){if(t>-1){if(this.type===m._in){this.unexpected(t)}e.await=true}else if(n&&this.options.ecmaVersion>=8){if(c.start===p&&!o&&c.type==="Identifier"&&c.name==="async"){this.unexpected()}else if(this.options.ecmaVersion>=9){e.await=false}}if(a&&n){this.raise(c.start,"The left-hand side of a for-of loop may not start with 'let'.")}this.toAssignable(c,false,h);this.checkLValPattern(c);return this.parseForIn(e,c)}else{this.checkExpressionErrors(h,true)}if(t>-1){this.unexpected(t)}return this.parseFor(e,c)};$.parseFunctionStatement=function(e,t,i){this.next();return this.parseFunction(e,ie|(i?0:se),false,t)};$.parseIfStatement=function(e){this.next();e.test=this.parseParenExpression();e.consequent=this.parseStatement("if");e.alternate=this.eat(m._else)?this.parseStatement("if"):null;return this.finishNode(e,"IfStatement")};$.parseReturnStatement=function(e){if(!this.inFunction&&!this.options.allowReturnOutsideFunction){this.raise(this.start,"'return' outside of function")}this.next();if(this.eat(m.semi)||this.insertSemicolon()){e.argument=null}else{e.argument=this.parseExpression();this.semicolon()}return this.finishNode(e,"ReturnStatement")};$.parseSwitchStatement=function(e){this.next();e.discriminant=this.parseParenExpression();e.cases=[];this.expect(m.braceL);this.labels.push(ee);this.enterScope(0);var t;for(var i=false;this.type!==m.braceR;){if(this.type===m._case||this.type===m._default){var s=this.type===m._case;if(t){this.finishNode(t,"SwitchCase")}e.cases.push(t=this.startNode());t.consequent=[];this.next();if(s){t.test=this.parseExpression()}else{if(i){this.raiseRecoverable(this.lastTokStart,"Multiple default clauses")}i=true;t.test=null}this.expect(m.colon)}else{if(!t){this.unexpected()}t.consequent.push(this.parseStatement(null))}}this.exitScope();if(t){this.finishNode(t,"SwitchCase")}this.next();this.labels.pop();return this.finishNode(e,"SwitchStatement")};$.parseThrowStatement=function(e){this.next();if(g.test(this.input.slice(this.lastTokEnd,this.start))){this.raise(this.lastTokEnd,"Illegal newline after throw")}e.argument=this.parseExpression();this.semicolon();return this.finishNode(e,"ThrowStatement")};var te=[];$.parseCatchClauseParam=function(){var e=this.parseBindingAtom();var t=e.type==="Identifier";this.enterScope(t?O:0);this.checkLValPattern(e,t?W:G);this.expect(m.parenR);return e};$.parseTryStatement=function(e){this.next();e.block=this.parseBlock();e.handler=null;if(this.type===m._catch){var t=this.startNode();this.next();if(this.eat(m.parenL)){t.param=this.parseCatchClauseParam()}else{if(this.options.ecmaVersion<10){this.unexpected()}t.param=null;this.enterScope(0)}t.body=this.parseBlock(false);this.exitScope();e.handler=this.finishNode(t,"CatchClause")}e.finalizer=this.eat(m._finally)?this.parseBlock():null;if(!e.handler&&!e.finalizer){this.raise(e.start,"Missing catch or finally clause")}return this.finishNode(e,"TryStatement")};$.parseVarStatement=function(e,t,i){this.next();this.parseVar(e,false,t,i);this.semicolon();return this.finishNode(e,"VariableDeclaration")};$.parseWhileStatement=function(e){this.next();e.test=this.parseParenExpression();this.labels.push(J);e.body=this.parseStatement("while");this.labels.pop();return this.finishNode(e,"WhileStatement")};$.parseWithStatement=function(e){if(this.strict){this.raise(this.start,"'with' in strict mode")}this.next();e.object=this.parseParenExpression();e.body=this.parseStatement("with");return this.finishNode(e,"WithStatement")};$.parseEmptyStatement=function(e){this.next();return this.finishNode(e,"EmptyStatement")};$.parseLabeledStatement=function(e,t,i,s){for(var r=0,a=this.labels;r<a.length;r+=1){var n=a[r];if(n.name===t){this.raise(i.start,"Label '"+t+"' is already declared")}}var o=this.type.isLoop?"loop":this.type===m._switch?"switch":null;for(var h=this.labels.length-1;h>=0;h--){var p=this.labels[h];if(p.statementStart===e.start){p.statementStart=this.start;p.kind=o}else{break}}this.labels.push({name:t,kind:o,statementStart:this.start});e.body=this.parseStatement(s?s.indexOf("label")===-1?s+"label":s:"label");this.labels.pop();e.label=i;return this.finishNode(e,"LabeledStatement")};$.parseExpressionStatement=function(e,t){e.expression=t;this.semicolon();return this.finishNode(e,"ExpressionStatement")};$.parseBlock=function(e,t,i){if(e===void 0)e=true;if(t===void 0)t=this.startNode();t.body=[];this.expect(m.braceL);if(e){this.enterScope(0)}while(this.type!==m.braceR){var s=this.parseStatement(null);t.body.push(s)}if(i){this.strict=false}this.next();if(e){this.exitScope()}return this.finishNode(t,"BlockStatement")};$.parseFor=function(e,t){e.init=t;this.expect(m.semi);e.test=this.type===m.semi?null:this.parseExpression();this.expect(m.semi);e.update=this.type===m.parenR?null:this.parseExpression();this.expect(m.parenR);e.body=this.parseStatement("for");this.exitScope();this.labels.pop();return this.finishNode(e,"ForStatement")};$.parseForIn=function(e,t){var i=this.type===m._in;this.next();if(t.type==="VariableDeclaration"&&t.declarations[0].init!=null&&(!i||this.options.ecmaVersion<8||this.strict||t.kind!=="var"||t.declarations[0].id.type!=="Identifier")){this.raise(t.start,(i?"for-in":"for-of")+" loop variable declaration may not have an initializer")}e.left=t;e.right=i?this.parseExpression():this.parseMaybeAssign();this.expect(m.parenR);e.body=this.parseStatement("for");this.exitScope();this.labels.pop();return this.finishNode(e,i?"ForInStatement":"ForOfStatement")};$.parseVar=function(e,t,i,s){e.declarations=[];e.kind=i;for(;;){var r=this.startNode();this.parseVarId(r,i);if(this.eat(m.eq)){r.init=this.parseMaybeAssign(t)}else if(!s&&i==="const"&&!(this.type===m._in||this.options.ecmaVersion>=6&&this.isContextual("of"))){this.unexpected()}else if(!s&&r.id.type!=="Identifier"&&!(t&&(this.type===m._in||this.isContextual("of")))){this.raise(this.lastTokEnd,"Complex binding patterns require an initialization value")}else{r.init=null}e.declarations.push(this.finishNode(r,"VariableDeclarator"));if(!this.eat(m.comma)){break}}return e};$.parseVarId=function(e,t){e.id=this.parseBindingAtom();this.checkLValPattern(e.id,t==="var"?j:G,false)};var ie=1,se=2,re=4;$.parseFunction=function(e,t,i,s,r){this.initFunction(e);if(this.options.ecmaVersion>=9||this.options.ecmaVersion>=6&&!s){if(this.type===m.star&&t&se){this.unexpected()}e.generator=this.eat(m.star)}if(this.options.ecmaVersion>=8){e.async=!!s}if(t&ie){e.id=t&re&&this.type!==m.name?null:this.parseIdent();if(e.id&&!(t&se)){this.checkLValSimple(e.id,this.strict||e.generator||e.async?this.treatFunctionsAsVar?j:G:H)}}var a=this.yieldPos,n=this.awaitPos,o=this.awaitIdentPos;this.yieldPos=0;this.awaitPos=0;this.awaitIdentPos=0;this.enterScope(functionFlags(e.async,e.generator));if(!(t&ie)){e.id=this.type===m.name?this.parseIdent():null}this.parseFunctionParams(e);this.parseFunctionBody(e,i,false,r);this.yieldPos=a;this.awaitPos=n;this.awaitIdentPos=o;return this.finishNode(e,t&ie?"FunctionDeclaration":"FunctionExpression")};$.parseFunctionParams=function(e){this.expect(m.parenL);e.params=this.parseBindingList(m.parenR,false,this.options.ecmaVersion>=8);this.checkYieldAwaitInDefaultParams()};$.parseClass=function(e,t){this.next();var i=this.strict;this.strict=true;this.parseClassId(e,t);this.parseClassSuper(e);var s=this.enterClassBody();var r=this.startNode();var a=false;r.body=[];this.expect(m.braceL);while(this.type!==m.braceR){var n=this.parseClassElement(e.superClass!==null);if(n){r.body.push(n);if(n.type==="MethodDefinition"&&n.kind==="constructor"){if(a){this.raiseRecoverable(n.start,"Duplicate constructor in the same class")}a=true}else if(n.key&&n.key.type==="PrivateIdentifier"&&isPrivateNameConflicted(s,n)){this.raiseRecoverable(n.key.start,"Identifier '#"+n.key.name+"' has already been declared")}}}this.strict=i;this.next();e.body=this.finishNode(r,"ClassBody");this.exitClassBody();return this.finishNode(e,t?"ClassDeclaration":"ClassExpression")};$.parseClassElement=function(e){if(this.eat(m.semi)){return null}var t=this.options.ecmaVersion;var i=this.startNode();var s="";var r=false;var a=false;var n="method";var o=false;if(this.eatContextual("static")){if(t>=13&&this.eat(m.braceL)){this.parseClassStaticBlock(i);return i}if(this.isClassElementNameStart()||this.type===m.star){o=true}else{s="static"}}i.static=o;if(!s&&t>=8&&this.eatContextual("async")){if((this.isClassElementNameStart()||this.type===m.star)&&!this.canInsertSemicolon()){a=true}else{s="async"}}if(!s&&(t>=9||!a)&&this.eat(m.star)){r=true}if(!s&&!a&&!r){var h=this.value;if(this.eatContextual("get")||this.eatContextual("set")){if(this.isClassElementNameStart()){n=h}else{s=h}}}if(s){i.computed=false;i.key=this.startNodeAt(this.lastTokStart,this.lastTokStartLoc);i.key.name=s;this.finishNode(i.key,"Identifier")}else{this.parseClassElementName(i)}if(t<13||this.type===m.parenL||n!=="method"||r||a){var p=!i.static&&checkKeyName(i,"constructor");var c=p&&e;if(p&&n!=="method"){this.raise(i.key.start,"Constructor can't have get/set modifier")}i.kind=p?"constructor":n;this.parseClassMethod(i,r,a,c)}else{this.parseClassField(i)}return i};$.isClassElementNameStart=function(){return this.type===m.name||this.type===m.privateId||this.type===m.num||this.type===m.string||this.type===m.bracketL||this.type.keyword};$.parseClassElementName=function(e){if(this.type===m.privateId){if(this.value==="constructor"){this.raise(this.start,"Classes can't have an element named '#constructor'")}e.computed=false;e.key=this.parsePrivateIdent()}else{this.parsePropertyName(e)}};$.parseClassMethod=function(e,t,i,s){var r=e.key;if(e.kind==="constructor"){if(t){this.raise(r.start,"Constructor can't be a generator")}if(i){this.raise(r.start,"Constructor can't be an async method")}}else if(e.static&&checkKeyName(e,"prototype")){this.raise(r.start,"Classes may not have a static property named prototype")}var a=e.value=this.parseMethod(t,i,s);if(e.kind==="get"&&a.params.length!==0){this.raiseRecoverable(a.start,"getter should have no params")}if(e.kind==="set"&&a.params.length!==1){this.raiseRecoverable(a.start,"setter should have exactly one param")}if(e.kind==="set"&&a.params[0].type==="RestElement"){this.raiseRecoverable(a.params[0].start,"Setter cannot use rest params")}return this.finishNode(e,"MethodDefinition")};$.parseClassField=function(e){if(checkKeyName(e,"constructor")){this.raise(e.key.start,"Classes can't have a field named 'constructor'")}else if(e.static&&checkKeyName(e,"prototype")){this.raise(e.key.start,"Classes can't have a static field named 'prototype'")}if(this.eat(m.eq)){var t=this.currentThisScope();var i=t.inClassFieldInit;t.inClassFieldInit=true;e.value=this.parseMaybeAssign();t.inClassFieldInit=i}else{e.value=null}this.semicolon();return this.finishNode(e,"PropertyDefinition")};$.parseClassStaticBlock=function(e){e.body=[];var t=this.labels;this.labels=[];this.enterScope(F|B);while(this.type!==m.braceR){var i=this.parseStatement(null);e.body.push(i)}this.next();this.exitScope();this.labels=t;return this.finishNode(e,"StaticBlock")};$.parseClassId=function(e,t){if(this.type===m.name){e.id=this.parseIdent();if(t){this.checkLValSimple(e.id,G,false)}}else{if(t===true){this.unexpected()}e.id=null}};$.parseClassSuper=function(e){e.superClass=this.eat(m._extends)?this.parseExprSubscripts(null,false):null};$.enterClassBody=function(){var e={declared:Object.create(null),used:[]};this.privateNameStack.push(e);return e.declared};$.exitClassBody=function(){var e=this.privateNameStack.pop();var t=e.declared;var i=e.used;if(!this.options.checkPrivateFields){return}var s=this.privateNameStack.length;var r=s===0?null:this.privateNameStack[s-1];for(var a=0;a<i.length;++a){var n=i[a];if(!S(t,n.name)){if(r){r.used.push(n)}else{this.raiseRecoverable(n.start,"Private field '#"+n.name+"' must be declared in an enclosing class")}}}};function isPrivateNameConflicted(e,t){var i=t.key.name;var s=e[i];var r="true";if(t.type==="MethodDefinition"&&(t.kind==="get"||t.kind==="set")){r=(t.static?"s":"i")+t.kind}if(s==="iget"&&r==="iset"||s==="iset"&&r==="iget"||s==="sget"&&r==="sset"||s==="sset"&&r==="sget"){e[i]="true";return false}else if(!s){e[i]=r;return false}else{return true}}function checkKeyName(e,t){var i=e.computed;var s=e.key;return!i&&(s.type==="Identifier"&&s.name===t||s.type==="Literal"&&s.value===t)}$.parseExportAllDeclaration=function(e,t){if(this.options.ecmaVersion>=11){if(this.eatContextual("as")){e.exported=this.parseModuleExportName();this.checkExport(t,e.exported,this.lastTokStart)}else{e.exported=null}}this.expectContextual("from");if(this.type!==m.string){this.unexpected()}e.source=this.parseExprAtom();if(this.options.ecmaVersion>=16){e.attributes=this.parseWithClause()}this.semicolon();return this.finishNode(e,"ExportAllDeclaration")};$.parseExport=function(e,t){this.next();if(this.eat(m.star)){return this.parseExportAllDeclaration(e,t)}if(this.eat(m._default)){this.checkExport(t,"default",this.lastTokStart);e.declaration=this.parseExportDefaultDeclaration();return this.finishNode(e,"ExportDefaultDeclaration")}if(this.shouldParseExportStatement()){e.declaration=this.parseExportDeclaration(e);if(e.declaration.type==="VariableDeclaration"){this.checkVariableExport(t,e.declaration.declarations)}else{this.checkExport(t,e.declaration.id,e.declaration.id.start)}e.specifiers=[];e.source=null}else{e.declaration=null;e.specifiers=this.parseExportSpecifiers(t);if(this.eatContextual("from")){if(this.type!==m.string){this.unexpected()}e.source=this.parseExprAtom();if(this.options.ecmaVersion>=16){e.attributes=this.parseWithClause()}}else{for(var i=0,s=e.specifiers;i<s.length;i+=1){var r=s[i];this.checkUnreserved(r.local);this.checkLocalExport(r.local);if(r.local.type==="Literal"){this.raise(r.local.start,"A string literal cannot be used as an exported binding without `from`.")}}e.source=null}this.semicolon()}return this.finishNode(e,"ExportNamedDeclaration")};$.parseExportDeclaration=function(e){return this.parseStatement(null)};$.parseExportDefaultDeclaration=function(){var e;if(this.type===m._function||(e=this.isAsyncFunction())){var t=this.startNode();this.next();if(e){this.next()}return this.parseFunction(t,ie|re,false,e)}else if(this.type===m._class){var i=this.startNode();return this.parseClass(i,"nullableID")}else{var s=this.parseMaybeAssign();this.semicolon();return s}};$.checkExport=function(e,t,i){if(!e){return}if(typeof t!=="string"){t=t.type==="Identifier"?t.name:t.value}if(S(e,t)){this.raiseRecoverable(i,"Duplicate export '"+t+"'")}e[t]=true};$.checkPatternExport=function(e,t){var i=t.type;if(i==="Identifier"){this.checkExport(e,t,t.start)}else if(i==="ObjectPattern"){for(var s=0,r=t.properties;s<r.length;s+=1){var a=r[s];this.checkPatternExport(e,a)}}else if(i==="ArrayPattern"){for(var n=0,o=t.elements;n<o.length;n+=1){var h=o[n];if(h){this.checkPatternExport(e,h)}}}else if(i==="Property"){this.checkPatternExport(e,t.value)}else if(i==="AssignmentPattern"){this.checkPatternExport(e,t.left)}else if(i==="RestElement"){this.checkPatternExport(e,t.argument)}};$.checkVariableExport=function(e,t){if(!e){return}for(var i=0,s=t;i<s.length;i+=1){var r=s[i];this.checkPatternExport(e,r.id)}};$.shouldParseExportStatement=function(){return this.type.keyword==="var"||this.type.keyword==="const"||this.type.keyword==="class"||this.type.keyword==="function"||this.isLet()||this.isAsyncFunction()};$.parseExportSpecifier=function(e){var t=this.startNode();t.local=this.parseModuleExportName();t.exported=this.eatContextual("as")?this.parseModuleExportName():t.local;this.checkExport(e,t.exported,t.exported.start);return this.finishNode(t,"ExportSpecifier")};$.parseExportSpecifiers=function(e){var t=[],i=true;this.expect(m.braceL);while(!this.eat(m.braceR)){if(!i){this.expect(m.comma);if(this.afterTrailingComma(m.braceR)){break}}else{i=false}t.push(this.parseExportSpecifier(e))}return t};$.parseImport=function(e){this.next();if(this.type===m.string){e.specifiers=te;e.source=this.parseExprAtom()}else{e.specifiers=this.parseImportSpecifiers();this.expectContextual("from");e.source=this.type===m.string?this.parseExprAtom():this.unexpected()}if(this.options.ecmaVersion>=16){e.attributes=this.parseWithClause()}this.semicolon();return this.finishNode(e,"ImportDeclaration")};$.parseImportSpecifier=function(){var e=this.startNode();e.imported=this.parseModuleExportName();if(this.eatContextual("as")){e.local=this.parseIdent()}else{this.checkUnreserved(e.imported);e.local=e.imported}this.checkLValSimple(e.local,G);return this.finishNode(e,"ImportSpecifier")};$.parseImportDefaultSpecifier=function(){var e=this.startNode();e.local=this.parseIdent();this.checkLValSimple(e.local,G);return this.finishNode(e,"ImportDefaultSpecifier")};$.parseImportNamespaceSpecifier=function(){var e=this.startNode();this.next();this.expectContextual("as");e.local=this.parseIdent();this.checkLValSimple(e.local,G);return this.finishNode(e,"ImportNamespaceSpecifier")};$.parseImportSpecifiers=function(){var e=[],t=true;if(this.type===m.name){e.push(this.parseImportDefaultSpecifier());if(!this.eat(m.comma)){return e}}if(this.type===m.star){e.push(this.parseImportNamespaceSpecifier());return e}this.expect(m.braceL);while(!this.eat(m.braceR)){if(!t){this.expect(m.comma);if(this.afterTrailingComma(m.braceR)){break}}else{t=false}e.push(this.parseImportSpecifier())}return e};$.parseWithClause=function(){var e=[];if(!this.eat(m._with)){return e}this.expect(m.braceL);var t={};var i=true;while(!this.eat(m.braceR)){if(!i){this.expect(m.comma);if(this.afterTrailingComma(m.braceR)){break}}else{i=false}var s=this.parseImportAttribute();var r=s.key.type==="Identifier"?s.key.name:s.key.value;if(S(t,r)){this.raiseRecoverable(s.key.start,"Duplicate attribute key '"+r+"'")}t[r]=true;e.push(s)}return e};$.parseImportAttribute=function(){var e=this.startNode();e.key=this.type===m.string?this.parseExprAtom():this.parseIdent(this.options.allowReserved!=="never");this.expect(m.colon);if(this.type!==m.string){this.unexpected()}e.value=this.parseExprAtom();return this.finishNode(e,"ImportAttribute")};$.parseModuleExportName=function(){if(this.options.ecmaVersion>=13&&this.type===m.string){var e=this.parseLiteral(this.value);if(E.test(e.value)){this.raise(e.start,"An export name cannot include a lone surrogate.")}return e}return this.parseIdent(true)};$.adaptDirectivePrologue=function(e){for(var t=0;t<e.length&&this.isDirectiveCandidate(e[t]);++t){e[t].directive=e[t].expression.raw.slice(1,-1)}};$.isDirectiveCandidate=function(e){return this.options.ecmaVersion>=5&&e.type==="ExpressionStatement"&&e.expression.type==="Literal"&&typeof e.expression.value==="string"&&(this.input[e.start]==='"'||this.input[e.start]==="'")};var ae=K.prototype;ae.toAssignable=function(e,t,i){if(this.options.ecmaVersion>=6&&e){switch(e.type){case"Identifier":if(this.inAsync&&e.name==="await"){this.raise(e.start,"Cannot use 'await' as identifier inside an async function")}break;case"ObjectPattern":case"ArrayPattern":case"AssignmentPattern":case"RestElement":break;case"ObjectExpression":e.type="ObjectPattern";if(i){this.checkPatternErrors(i,true)}for(var s=0,r=e.properties;s<r.length;s+=1){var a=r[s];this.toAssignable(a,t);if(a.type==="RestElement"&&(a.argument.type==="ArrayPattern"||a.argument.type==="ObjectPattern")){this.raise(a.argument.start,"Unexpected token")}}break;case"Property":if(e.kind!=="init"){this.raise(e.key.start,"Object pattern can't contain getter or setter")}this.toAssignable(e.value,t);break;case"ArrayExpression":e.type="ArrayPattern";if(i){this.checkPatternErrors(i,true)}this.toAssignableList(e.elements,t);break;case"SpreadElement":e.type="RestElement";this.toAssignable(e.argument,t);if(e.argument.type==="AssignmentPattern"){this.raise(e.argument.start,"Rest elements cannot have a default value")}break;case"AssignmentExpression":if(e.operator!=="="){this.raise(e.left.end,"Only '=' operator can be used for specifying default value.")}e.type="AssignmentPattern";delete e.operator;this.toAssignable(e.left,t);break;case"ParenthesizedExpression":this.toAssignable(e.expression,t,i);break;case"ChainExpression":this.raiseRecoverable(e.start,"Optional chaining cannot appear in left-hand side");break;case"MemberExpression":if(!t){break}default:this.raise(e.start,"Assigning to rvalue")}}else if(i){this.checkPatternErrors(i,true)}return e};ae.toAssignableList=function(e,t){var i=e.length;for(var s=0;s<i;s++){var r=e[s];if(r){this.toAssignable(r,t)}}if(i){var a=e[i-1];if(this.options.ecmaVersion===6&&t&&a&&a.type==="RestElement"&&a.argument.type!=="Identifier"){this.unexpected(a.argument.start)}}return e};ae.parseSpread=function(e){var t=this.startNode();this.next();t.argument=this.parseMaybeAssign(false,e);return this.finishNode(t,"SpreadElement")};ae.parseRestBinding=function(){var e=this.startNode();this.next();if(this.options.ecmaVersion===6&&this.type!==m.name){this.unexpected()}e.argument=this.parseBindingAtom();return this.finishNode(e,"RestElement")};ae.parseBindingAtom=function(){if(this.options.ecmaVersion>=6){switch(this.type){case m.bracketL:var e=this.startNode();this.next();e.elements=this.parseBindingList(m.bracketR,true,true);return this.finishNode(e,"ArrayPattern");case m.braceL:return this.parseObj(true)}}return this.parseIdent()};ae.parseBindingList=function(e,t,i,s){var r=[],a=true;while(!this.eat(e)){if(a){a=false}else{this.expect(m.comma)}if(t&&this.type===m.comma){r.push(null)}else if(i&&this.afterTrailingComma(e)){break}else if(this.type===m.ellipsis){var n=this.parseRestBinding();this.parseBindingListItem(n);r.push(n);if(this.type===m.comma){this.raiseRecoverable(this.start,"Comma is not permitted after the rest element")}this.expect(e);break}else{r.push(this.parseAssignableListItem(s))}}return r};ae.parseAssignableListItem=function(e){var t=this.parseMaybeDefault(this.start,this.startLoc);this.parseBindingListItem(t);return t};ae.parseBindingListItem=function(e){return e};ae.parseMaybeDefault=function(e,t,i){i=i||this.parseBindingAtom();if(this.options.ecmaVersion<6||!this.eat(m.eq)){return i}var s=this.startNodeAt(e,t);s.left=i;s.right=this.parseMaybeAssign();return this.finishNode(s,"AssignmentPattern")};ae.checkLValSimple=function(e,t,i){if(t===void 0)t=q;var s=t!==q;switch(e.type){case"Identifier":if(this.strict&&this.reservedWordsStrictBind.test(e.name)){this.raiseRecoverable(e.start,(s?"Binding ":"Assigning to ")+e.name+" in strict mode")}if(s){if(t===G&&e.name==="let"){this.raiseRecoverable(e.start,"let is disallowed as a lexically bound name")}if(i){if(S(i,e.name)){this.raiseRecoverable(e.start,"Argument name clash")}i[e.name]=true}if(t!==z){this.declareName(e.name,t,e.start)}}break;case"ChainExpression":this.raiseRecoverable(e.start,"Optional chaining cannot appear in left-hand side");break;case"MemberExpression":if(s){this.raiseRecoverable(e.start,"Binding member expression")}break;case"ParenthesizedExpression":if(s){this.raiseRecoverable(e.start,"Binding parenthesized expression")}return this.checkLValSimple(e.expression,t,i);default:this.raise(e.start,(s?"Binding":"Assigning to")+" rvalue")}};ae.checkLValPattern=function(e,t,i){if(t===void 0)t=q;switch(e.type){case"ObjectPattern":for(var s=0,r=e.properties;s<r.length;s+=1){var a=r[s];this.checkLValInnerPattern(a,t,i)}break;case"ArrayPattern":for(var n=0,o=e.elements;n<o.length;n+=1){var h=o[n];if(h){this.checkLValInnerPattern(h,t,i)}}break;default:this.checkLValSimple(e,t,i)}};ae.checkLValInnerPattern=function(e,t,i){if(t===void 0)t=q;switch(e.type){case"Property":this.checkLValInnerPattern(e.value,t,i);break;case"AssignmentPattern":this.checkLValPattern(e.left,t,i);break;case"RestElement":this.checkLValPattern(e.argument,t,i);break;default:this.checkLValPattern(e,t,i)}};var ne=function TokContext(e,t,i,s,r){this.token=e;this.isExpr=!!t;this.preserveSpace=!!i;this.override=s;this.generator=!!r};var oe={b_stat:new ne("{",false),b_expr:new ne("{",true),b_tmpl:new ne("${",false),p_stat:new ne("(",false),p_expr:new ne("(",true),q_tmpl:new ne("`",true,true,(function(e){return e.tryReadTemplateToken()})),f_stat:new ne("function",false),f_expr:new ne("function",true),f_expr_gen:new ne("function",true,false,null,true),f_gen:new ne("function",false,false,null,true)};var he=K.prototype;he.initialContext=function(){return[oe.b_stat]};he.curContext=function(){return this.context[this.context.length-1]};he.braceIsBlock=function(e){var t=this.curContext();if(t===oe.f_expr||t===oe.f_stat){return true}if(e===m.colon&&(t===oe.b_stat||t===oe.b_expr)){return!t.isExpr}if(e===m._return||e===m.name&&this.exprAllowed){return g.test(this.input.slice(this.lastTokEnd,this.start))}if(e===m._else||e===m.semi||e===m.eof||e===m.parenR||e===m.arrow){return true}if(e===m.braceL){return t===oe.b_stat}if(e===m._var||e===m._const||e===m.name){return false}return!this.exprAllowed};he.inGeneratorContext=function(){for(var e=this.context.length-1;e>=1;e--){var t=this.context[e];if(t.token==="function"){return t.generator}}return false};he.updateContext=function(e){var t,i=this.type;if(i.keyword&&e===m.dot){this.exprAllowed=false}else if(t=i.updateContext){t.call(this,e)}else{this.exprAllowed=i.beforeExpr}};he.overrideContext=function(e){if(this.curContext()!==e){this.context[this.context.length-1]=e}};m.parenR.updateContext=m.braceR.updateContext=function(){if(this.context.length===1){this.exprAllowed=true;return}var e=this.context.pop();if(e===oe.b_stat&&this.curContext().token==="function"){e=this.context.pop()}this.exprAllowed=!e.isExpr};m.braceL.updateContext=function(e){this.context.push(this.braceIsBlock(e)?oe.b_stat:oe.b_expr);this.exprAllowed=true};m.dollarBraceL.updateContext=function(){this.context.push(oe.b_tmpl);this.exprAllowed=true};m.parenL.updateContext=function(e){var t=e===m._if||e===m._for||e===m._with||e===m._while;this.context.push(t?oe.p_stat:oe.p_expr);this.exprAllowed=true};m.incDec.updateContext=function(){};m._function.updateContext=m._class.updateContext=function(e){if(e.beforeExpr&&e!==m._else&&!(e===m.semi&&this.curContext()!==oe.p_stat)&&!(e===m._return&&g.test(this.input.slice(this.lastTokEnd,this.start)))&&!((e===m.colon||e===m.braceL)&&this.curContext()===oe.b_stat)){this.context.push(oe.f_expr)}else{this.context.push(oe.f_stat)}this.exprAllowed=false};m.colon.updateContext=function(){if(this.curContext().token==="function"){this.context.pop()}this.exprAllowed=true};m.backQuote.updateContext=function(){if(this.curContext()===oe.q_tmpl){this.context.pop()}else{this.context.push(oe.q_tmpl)}this.exprAllowed=false};m.star.updateContext=function(e){if(e===m._function){var t=this.context.length-1;if(this.context[t]===oe.f_expr){this.context[t]=oe.f_expr_gen}else{this.context[t]=oe.f_gen}}this.exprAllowed=true};m.name.updateContext=function(e){var t=false;if(this.options.ecmaVersion>=6&&e!==m.dot){if(this.value==="of"&&!this.exprAllowed||this.value==="yield"&&this.inGeneratorContext()){t=true}}this.exprAllowed=t};var pe=K.prototype;pe.checkPropClash=function(e,t,i){if(this.options.ecmaVersion>=9&&e.type==="SpreadElement"){return}if(this.options.ecmaVersion>=6&&(e.computed||e.method||e.shorthand)){return}var s=e.key;var r;switch(s.type){case"Identifier":r=s.name;break;case"Literal":r=String(s.value);break;default:return}var a=e.kind;if(this.options.ecmaVersion>=6){if(r==="__proto__"&&a==="init"){if(t.proto){if(i){if(i.doubleProto<0){i.doubleProto=s.start}}else{this.raiseRecoverable(s.start,"Redefinition of __proto__ property")}}t.proto=true}return}r="$"+r;var n=t[r];if(n){var o;if(a==="init"){o=this.strict&&n.init||n.get||n.set}else{o=n.init||n[a]}if(o){this.raiseRecoverable(s.start,"Redefinition of property")}}else{n=t[r]={init:false,get:false,set:false}}n[a]=true};pe.parseExpression=function(e,t){var i=this.start,s=