prettier/plugins/acorn.js

Prettier is an opinionated code formatter

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this.next(),e.test=this.parseParenExpression(),this.labels.push($e),e.body=this.parseStatement("while"),this.labels.pop(),this.finishNode(e,"WhileStatement")},S.parseWithStatement=function(e){return this.strict&&this.raise(this.start,"'with' in strict mode"),this.next(),e.object=this.parseParenExpression(),e.body=this.parseStatement("with"),this.finishNode(e,"WithStatement")},S.parseEmptyStatement=function(e){return this.next(),this.finishNode(e,"EmptyStatement")},S.parseLabeledStatement=function(e,t,i,s){for(var n=0,o=this.labels;n<o.length;n+=1){var p=o[n];p.name===t&&this.raise(i.start,"Label '"+t+"' is already declared")}for(var x=this.type.isLoop?"loop":this.type===r._switch?"switch":null,g=this.labels.length-1;g>=0;g--){var T=this.labels[g];if(T.statementStart===e.start)T.statementStart=this.start,T.kind=x;else break}return this.labels.push({name:t,kind:x,statementStart:this.start}),e.body=this.parseStatement(s?s.indexOf("label")===-1?s+"label":s:"label"),this.labels.pop(),e.label=i,this.finishNode(e,"LabeledStatement")},S.parseExpressionStatement=function(e,t){return e.expression=t,this.semicolon(),this.finishNode(e,"ExpressionStatement")},S.parseBlock=function(e,t,i){for(e===void 0&&(e=!0),t===void 0&&(t=this.startNode()),t.body=[],this.expect(r.braceL),e&&this.enterScope(0);this.type!==r.braceR;){var s=this.parseStatement(null);t.body.push(s)}return i&&(this.strict=!1),this.next(),e&&this.exitScope(),this.finishNode(t,"BlockStatement")},S.parseFor=function(e,t){return e.init=t,this.expect(r.semi),e.test=this.type===r.semi?null:this.parseExpression(),this.expect(r.semi),e.update=this.type===r.parenR?null:this.parseExpression(),this.expect(r.parenR),e.body=this.parseStatement("for"),this.exitScope(),this.labels.pop(),this.finishNode(e,"ForStatement")},S.parseForIn=function(e,t){var i=this.type===r._in;return this.next(),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(r.parenR),e.body=this.parseStatement("for"),this.exitScope(),this.labels.pop(),this.finishNode(e,i?"ForInStatement":"ForOfStatement")},S.parseVar=function(e,t,i,s){for(e.declarations=[],e.kind=i;;){var n=this.startNode();if(this.parseVarId(n,i),this.eat(r.eq)?n.init=this.parseMaybeAssign(t):!s&&i==="const"&&!(this.type===r._in||this.options.ecmaVersion>=6&&this.isContextual("of"))?this.unexpected():!s&&n.id.type!=="Identifier"&&!(t&&(this.type===r._in||this.isContextual("of")))?this.raise(this.lastTokEnd,"Complex binding patterns require an initialization value"):n.init=null,e.declarations.push(this.finishNode(n,"VariableDeclarator")),!this.eat(r.comma))break}return e},S.parseVarId=function(e,t){e.id=this.parseBindingAtom(),this.checkLValPattern(e.id,t==="var"?Ye:Q,!1)};var ye=1,Ze=2,kt=4;S.parseFunction=function(e,t,i,s,n){this.initFunction(e),(this.options.ecmaVersion>=9||this.options.ecmaVersion>=6&&!s)&&(this.type===r.star&&t&Ze&&this.unexpected(),e.generator=this.eat(r.star)),this.options.ecmaVersion>=8&&(e.async=!!s),t&ye&&(e.id=t&kt&&this.type!==r.name?null:this.parseIdent(),e.id&&!(t&Ze)&&this.checkLValSimple(e.id,this.strict||e.generator||e.async?this.treatFunctionsAsVar?Ye:Q:St));var o=this.yieldPos,p=this.awaitPos,x=this.awaitIdentPos;return this.yieldPos=0,this.awaitPos=0,this.awaitIdentPos=0,this.enterScope(Qe(e.async,e.generator)),t&ye||(e.id=this.type===r.name?this.parseIdent():null),this.parseFunctionParams(e),this.parseFunctionBody(e,i,!1,n),this.yieldPos=o,this.awaitPos=p,this.awaitIdentPos=x,this.finishNode(e,t&ye?"FunctionDeclaration":"FunctionExpression")},S.parseFunctionParams=function(e){this.expect(r.parenL),e.params=this.parseBindingList(r.parenR,!1,this.options.ecmaVersion>=8),this.checkYieldAwaitInDefaultParams()},S.parseClass=function(e,t){this.next();var i=this.strict;this.strict=!0,this.parseClassId(e,t),this.parseClassSuper(e);var s=this.enterClassBody(),n=this.startNode(),o=!1;for(n.body=[],this.expect(r.braceL);this.type!==r.braceR;){var p=this.parseClassElement(e.superClass!==null);p&&(n.body.push(p),p.type==="MethodDefinition"&&p.kind==="constructor"?(o&&this.raiseRecoverable(p.start,"Duplicate constructor in the same class"),o=!0):p.key&&p.key.type==="PrivateIdentifier"&&Ii(s,p)&&this.raiseRecoverable(p.key.start,"Identifier '#"+p.key.name+"' has already been declared"))}return this.strict=i,this.next(),e.body=this.finishNode(n,"ClassBody"),this.exitClassBody(),this.finishNode(e,t?"ClassDeclaration":"ClassExpression")},S.parseClassElement=function(e){if(this.eat(r.semi))return null;var t=this.options.ecmaVersion,i=this.startNode(),s="",n=!1,o=!1,p="method",x=!1;if(this.eatContextual("static")){if(t>=13&&this.eat(r.braceL))return this.parseClassStaticBlock(i),i;this.isClassElementNameStart()||this.type===r.star?x=!0:s="static"}if(i.static=x,!s&&t>=8&&this.eatContextual("async")&&((this.isClassElementNameStart()||this.type===r.star)&&!this.canInsertSemicolon()?o=!0:s="async"),!s&&(t>=9||!o)&&this.eat(r.star)&&(n=!0),!s&&!o&&!n){var g=this.value;(this.eatContextual("get")||this.eatContextual("set"))&&(this.isClassElementNameStart()?p=g:s=g)}if(s?(i.computed=!1,i.key=this.startNodeAt(this.lastTokStart,this.lastTokStartLoc),i.key.name=s,this.finishNode(i.key,"Identifier")):this.parseClassElementName(i),t<13||this.type===r.parenL||p!=="method"||n||o){var T=!i.static&&Ne(i,"constructor"),w=T&&e;T&&p!=="method"&&this.raise(i.key.start,"Constructor can't have get/set modifier"),i.kind=T?"constructor":p,this.parseClassMethod(i,n,o,w)}else this.parseClassField(i);return i},S.isClassElementNameStart=function(){return this.type===r.name||this.type===r.privateId||this.type===r.num||this.type===r.string||this.type===r.bracketL||this.type.keyword},S.parseClassElementName=function(e){this.type===r.privateId?(this.value==="constructor"&&this.raise(this.start,"Classes can't have an element named '#constructor'"),e.computed=!1,e.key=this.parsePrivateIdent()):this.parsePropertyName(e)},S.parseClassMethod=function(e,t,i,s){var n=e.key;e.kind==="constructor"?(t&&this.raise(n.start,"Constructor can't be a generator"),i&&this.raise(n.start,"Constructor can't be an async method")):e.static&&Ne(e,"prototype")&&this.raise(n.start,"Classes may not have a static property named prototype");var o=e.value=this.parseMethod(t,i,s);return e.kind==="get"&&o.params.length!==0&&this.raiseRecoverable(o.start,"getter should have no params"),e.kind==="set"&&o.params.length!==1&&this.raiseRecoverable(o.start,"setter should have exactly one param"),e.kind==="set"&&o.params[0].type==="RestElement"&&this.raiseRecoverable(o.params[0].start,"Setter cannot use rest params"),this.finishNode(e,"MethodDefinition")},S.parseClassField=function(e){if(Ne(e,"constructor")?this.raise(e.key.start,"Classes can't have a field named 'constructor'"):e.static&&Ne(e,"prototype")&&this.raise(e.key.start,"Classes can't have a static field named 'prototype'"),this.eat(r.eq)){var t=this.currentThisScope(),i=t.inClassFieldInit;t.inClassFieldInit=!0,e.value=this.parseMaybeAssign(),t.inClassFieldInit=i}else e.value=null;return this.semicolon(),this.finishNode(e,"PropertyDefinition")},S.parseClassStaticBlock=function(e){e.body=[];var t=this.labels;for(this.labels=[],this.enterScope(xe|Xe);this.type!==r.braceR;){var i=this.parseStatement(null);e.body.push(i)}return this.next(),this.exitScope(),this.labels=t,this.finishNode(e,"StaticBlock")},S.parseClassId=function(e,t){this.type===r.name?(e.id=this.parseIdent(),t&&this.checkLValSimple(e.id,Q,!1)):(t===!0&&this.unexpected(),e.id=null)},S.parseClassSuper=function(e){e.superClass=this.eat(r._extends)?this.parseExprSubscripts(null,!1):null},S.enterClassBody=function(){var e={declared:Object.create(null),used:[]};return this.privateNameStack.push(e),e.declared},S.exitClassBody=function(){for(var e=this.privateNameStack.pop(),t=e.declared,i=e.used,s=this.privateNameStack.length,n=s===0?null:this.privateNameStack[s-1],o=0;o<i.length;++o){var p=i[o];fe(t,p.name)||(n?n.used.push(p):this.raiseRecoverable(p.start,"Private field '#"+p.name+"' must be declared in an enclosing class"))}};function Ii(e,t){var i=t.key.name,s=e[i],n="true";return t.type==="MethodDefinition"&&(t.kind==="get"||t.kind==="set")&&(n=(t.static?"s":"i")+t.kind),s==="iget"&&n==="iset"||s==="iset"&&n==="iget"||s==="sget"&&n==="sset"||s==="sset"&&n==="sget"?(e[i]="true",!1):s?!0:(e[i]=n,!1)}function Ne(e,t){var i=e.computed,s=e.key;return!i&&(s.type==="Identifier"&&s.name===t||s.type==="Literal"&&s.value===t)}S.parseExportAllDeclaration=function(e,t){return this.options.ecmaVersion>=11&&(this.eatContextual("as")?(e.exported=this.parseModuleExportName(),this.checkExport(t,e.exported,this.lastTokStart)):e.exported=null),this.expectContextual("from"),this.type!==r.string&&this.unexpected(),e.source=this.parseExprAtom(),this.semicolon(),this.finishNode(e,"ExportAllDeclaration")},S.parseExport=function(e,t){if(this.next(),this.eat(r.star))return this.parseExportAllDeclaration(e,t);if(this.eat(r._default))return this.checkExport(t,"default",this.lastTokStart),e.declaration=this.parseExportDefaultDeclaration(),this.finishNode(e,"ExportDefaultDeclaration");if(this.shouldParseExportStatement())e.declaration=this.parseExportDeclaration(e),e.declaration.type==="VariableDeclaration"?this.checkVariableExport(t,e.declaration.declarations):this.checkExport(t,e.declaration.id,e.declaration.id.start),e.specifiers=[],e.source=null;else{if(e.declaration=null,e.specifiers=this.parseExportSpecifiers(t),this.eatContextual("from"))this.type!==r.string&&this.unexpected(),e.source=this.parseExprAtom();else{for(var i=0,s=e.specifiers;i<s.length;i+=1){var n=s[i];this.checkUnreserved(n.local),this.checkLocalExport(n.local),n.local.type==="Literal"&&this.raise(n.local.start,"A string literal cannot be used as an exported binding without `from`.")}e.source=null}this.semicolon()}return this.finishNode(e,"ExportNamedDeclaration")},S.parseExportDeclaration=function(e){return this.parseStatement(null)},S.parseExportDefaultDeclaration=function(){var e;if(this.type===r._function||(e=this.isAsyncFunction())){var t=this.startNode();return this.next(),e&&this.next(),this.parseFunction(t,ye|kt,!1,e)}else if(this.type===r._class){var i=this.startNode();return this.parseClass(i,"nullableID")}else{var s=this.parseMaybeAssign();return this.semicolon(),s}},S.checkExport=function(e,t,i){e&&(typeof t!="string"&&(t=t.type==="Identifier"?t.name:t.value),fe(e,t)&&this.raiseRecoverable(i,"Duplicate export '"+t+"'"),e[t]=!0)},S.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,n=t.properties;s<n.length;s+=1){var o=n[s];this.checkPatternExport(e,o)}else if(i==="ArrayPattern")for(var p=0,x=t.elements;p<x.length;p+=1){var g=x[p];g&&this.checkPatternExport(e,g)}else i==="Property"?this.checkPatternExport(e,t.value):i==="AssignmentPattern"?this.checkPatternExport(e,t.left):i==="RestElement"?this.checkPatternExport(e,t.argument):i==="ParenthesizedExpression"&&this.checkPatternExport(e,t.expression)},S.checkVariableExport=function(e,t){if(e)for(var i=0,s=t;i<s.length;i+=1){var n=s[i];this.checkPatternExport(e,n.id)}},S.shouldParseExportStatement=function(){return this.type.keyword==="var"||this.type.keyword==="const"||this.type.keyword==="class"||this.type.keyword==="function"||this.isLet()||this.isAsyncFunction()},S.parseExportSpecifier=function(e){var t=this.startNode();return t.local=this.parseModuleExportName(),t.exported=this.eatContextual("as")?this.parseModuleExportName():t.local,this.checkExport(e,t.exported,t.exported.start),this.finishNode(t,"ExportSpecifier")},S.parseExportSpecifiers=function(e){var t=[],i=!0;for(this.expect(r.braceL);!this.eat(r.braceR);){if(i)i=!1;else if(this.expect(r.comma),this.afterTrailingComma(r.braceR))break;t.push(this.parseExportSpecifier(e))}return t},S.parseImport=function(e){return this.next(),this.type===r.string?(e.specifiers=Pi,e.source=this.parseExprAtom()):(e.specifiers=this.parseImportSpecifiers(),this.expectContextual("from"),e.source=this.type===r.string?this.parseExprAtom():this.unexpected()),this.semicolon(),this.finishNode(e,"ImportDeclaration")},S.parseImportSpecifier=function(){var e=this.startNode();return e.imported=this.parseModuleExportName(),this.eatContextual("as")?e.local=this.parseIdent():(this.checkUnreserved(e.imported),e.local=e.imported),this.checkLValSimple(e.local,Q),this.finishNode(e,"ImportSpecifier")},S.parseImportDefaultSpecifier=function(){var e=this.startNode();return e.local=this.parseIdent(),this.checkLValSimple(e.local,Q),this.finishNode(e,"ImportDefaultSpecifier")},S.parseImportNamespaceSpecifier=function(){var e=this.startNode();return this.next(),this.expectContextual("as"),e.local=this.parseIdent(),this.checkLValSimple(e.local,Q),this.finishNode(e,"ImportNamespaceSpecifier")},S.parseImportSpecifiers=function(){var e=[],t=!0;if(this.type===r.name&&(e.push(this.parseImportDefaultSpecifier()),!this.eat(r.comma)))return e;if(this.type===r.star)return e.push(this.parseImportNamespaceSpecifier()),e;for(this.expect(r.braceL);!this.eat(r.braceR);){if(t)t=!1;else if(this.expect(r.comma),this.afterTrailingComma(r.braceR))break;e.push(this.parseImportSpecifier())}return e},S.parseModuleExportName=function(){if(this.options.ecmaVersion>=13&&this.type===r.string){var e=this.parseLiteral(this.value);return ki.test(e.value)&&this.raise(e.start,"An export name cannot include a lone surrogate."),e}return this.parseIdent(!0)},S.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)},S.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 q=V.prototype;q.toAssignable=function(e,t,i){if(this.options.ecmaVersion>=6&&e)switch(e.type){case"Identifier":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",i&&this.checkPatternErrors(i,!0);for(var s=0,n=e.properties;s<n.length;s+=1){var o=n[s];this.toAssignable(o,t),o.type==="RestElement"&&(o.argument.type==="ArrayPattern"||o.argument.type==="ObjectPattern")&&this.raise(o.argument.start,"Unexpected token")}break;case"Property":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",i&&this.checkPatternErrors(i,!0),this.toAssignableList(e.elements,t);break;case"SpreadElement":e.type="RestElement",this.toAssignable(e.argument,t),e.argument.type==="AssignmentPattern"&&this.raise(e.argument.start,"Rest elements cannot have a default value");break;case"AssignmentExpression":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 i&&this.checkPatternErrors(i,!0);return e},q.toAssignableList=function(e,t){for(var i=e.length,s=0;s<i;s++){var n=e[s];n&&this.toAssignable(n,t)}if(i){var o=e[i-1];this.options.ecmaVersion===6&&t&&o&&o.type==="RestElement"&&o.argument.type!=="Identifier"&&this.unexpected(o.argument.start)}return e},q.parseSpread=function(e){var t=this.startNode();return this.next(),t.argument=this.parseMaybeAssign(!1,e),this.finishNode(t,"SpreadElement")},q.parseRestBinding=function(){var e=this.startNode();return this.next(),this.options.ecmaVersion===6&&this.type!==r.name&&this.unexpected(),e.argument=this.parseBindingAtom(),this.finishNode(e,"RestElement")},q.parseBindingAtom=function(){if(this.options.ecmaVersion>=6)switch(this.type){case r.bracketL:var e=this.startNode();return this.next(),e.elements=this.parseBindingList(r.bracketR,!0,!0),this.finishNode(e,"ArrayPattern");case r.braceL:return this.parseObj(!0)}return this.parseIdent()},q.parseBindingList=function(e,t,i,s){for(var n=[],o=!0;!this.eat(e);)if(o?o=!1:this.expect(r.comma),t&&this.type===r.comma)n.push(null);else{if(i&&this.afterTrailingComma(e))break;if(this.type===r.ellipsis){var p=this.parseRestBinding();this.parseBindingListItem(p),n.push(p),this.type===r.comma&&this.raiseRecoverable(this.start,"Comma is not permitted after the rest element"),this.expect(e);break}else n.push(this.parseAssignableListItem(s))}return n},q.parseAssignableListItem=function(e){var t=this.parseMaybeDefault(this.start,this.startLoc);return this.parseBindingListItem(t),t},q.parseBindingListItem=function(e){return e},q.parseMaybeDefault=function(e,t,i){if(i=i||this.parseBindingAtom(),this.options.ecmaVersion<6||!this.eat(r.eq))return i;var s=this.startNodeAt(e,t);return s.left=i,s.right=this.parseMaybeAssign(),this.finishNode(s,"AssignmentPattern")},q.checkLValSimple=function(e,t,i){t===void 0&&(t=Pe);var s=t!==Pe;switch(e.type){case"Identifier":this.strict&&this.reservedWordsStrictBind.test(e.name)&&this.raiseRecoverable(e.start,(s?"Binding ":"Assigning to ")+e.name+" in strict mode"),s&&(t===Q&&e.name==="let"&&this.raiseRecoverable(e.start,"let is disallowed as a lexically bound name"),i&&(fe(i,e.name)&&this.raiseRecoverable(e.start,"Argument name clash"),i[e.name]=!0),t!==Ct&&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":s&&this.raiseRecoverable(e.start,"Binding member expression");break;case"ParenthesizedExpression":return s&&this.raiseRecoverable(e.start,"Binding parenthesized expression"),this.checkLValSimple(e.expression,t,i);default:this.raise(e.start,(s?"Binding":"Assigning to")+" rvalue")}},q.checkLValPattern=function(e,t,i){switch(t===void 0&&(t=Pe),e.type){case"Obje