use directories for structure
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62
node_modules/acorn-class-fields/index.js
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62
node_modules/acorn-class-fields/index.js
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"use strict"
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const privateClassElements = require("acorn-private-class-elements")
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module.exports = function(Parser) {
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const acorn = Parser.acorn || require("acorn")
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const tt = acorn.tokTypes
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Parser = privateClassElements(Parser)
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return class extends Parser {
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_maybeParseFieldValue(field) {
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if (this.eat(tt.eq)) {
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const oldInFieldValue = this._inFieldValue
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this._inFieldValue = true
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field.value = this.parseExpression()
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this._inFieldValue = oldInFieldValue
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} else field.value = null
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}
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// Parse fields
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parseClassElement(_constructorAllowsSuper) {
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if (this.options.ecmaVersion >= 8 && (this.type == tt.name || this.type.keyword || this.type == this.privateNameToken || this.type == tt.bracketL || this.type == tt.string || this.type == tt.num)) {
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const branch = this._branch()
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if (branch.type == tt.bracketL) {
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let count = 0
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do {
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if (branch.eat(tt.bracketL)) ++count
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else if (branch.eat(tt.bracketR)) --count
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else branch.next()
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} while (count > 0)
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} else branch.next()
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if (branch.type == tt.eq || branch.canInsertSemicolon() || branch.type == tt.semi) {
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const node = this.startNode()
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if (this.type == this.privateNameToken) {
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this.parsePrivateClassElementName(node)
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} else {
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this.parsePropertyName(node)
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}
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if ((node.key.type === "Identifier" && node.key.name === "constructor") ||
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(node.key.type === "Literal" && node.key.value === "constructor")) {
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this.raise(node.key.start, "Classes may not have a field called constructor")
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}
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this.enterScope(64 | 2 | 1) // See acorn's scopeflags.js
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this._maybeParseFieldValue(node)
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this.exitScope()
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this.finishNode(node, "FieldDefinition")
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this.semicolon()
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return node
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}
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}
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return super.parseClassElement.apply(this, arguments)
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}
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// Prohibit arguments in class field initializers
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parseIdent(liberal, isBinding) {
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const ident = super.parseIdent(liberal, isBinding)
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if (this._inFieldValue && ident.name == "arguments") this.raise(ident.start, "A class field initializer may not contain arguments")
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return ident
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}
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}
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}
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