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