Method parseLexicalBinding

src/parser.ts:1833–1860

(kind: string, options)

    // https://tc39.github.io/ecma262/#sec-let-and-const-declarations

    parseLexicalBinding(kind: string, options): Node.VariableDeclarator {
        const node = this.createNode();
        const params = [];
        const id = this.parsePattern(params, kind);

        if (this.context.strict && id.type === Syntax.Identifier) {
            if (this.scanner.isRestrictedWord((id as Node.Identifier).name)) {
                this.tolerateError(Messages.StrictVarName);
            }
        }

        let init: Node.Expression | null = null;
        if (kind === 'const') {
            if (!this.matchKeyword('in') && !this.matchContextualKeyword('of')) {
                if (this.match('=')) {
                    this.nextToken();
                    init = this.isolateCoverGrammar(this.parseAssignmentExpression);
                } else {
                    this.throwError(Messages.DeclarationMissingInitializer, 'const');
                }
            }
        } else if ((!options.inFor && id.type !== Syntax.Identifier) || this.match('=')) {
            this.expect('=');
            init = this.isolateCoverGrammar(this.parseAssignmentExpression);
        }

        return this.finalize(node, new Node.VariableDeclarator(id, init));
    }

    parseBindingList(kind: string, options): Node.VariableDeclarator[] {
        const list = [this.parseLexicalBinding(kind, options)];