Method parsePattern

src/parser.ts:1989–2005

(params, kind?: string)

    }

    parsePattern(params, kind?: string): Node.BindingIdentifier | Node.BindingPattern {
        let pattern;

        if (this.match('[')) {
            pattern = this.parseArrayPattern(params, kind);
        } else if (this.match('{')) {
            pattern = this.parseObjectPattern(params, kind);
        } else {
            if (this.matchKeyword('let') && (kind === 'const' || kind === 'let')) {
                this.tolerateUnexpectedToken(this.lookahead, Messages.LetInLexicalBinding);
            }
            params.push(this.lookahead);
            pattern = this.parseVariableIdentifier(kind);
        }

        return pattern;
    }

    parsePatternWithDefault(params, kind?: string): Node.AssignmentPattern | Node.BindingIdentifier | Node.BindingPattern {
        const startToken = this.lookahead;