Method parseLeftHandSideExpression

src/parser.ts:1313–1346

()

    }

    parseLeftHandSideExpression(): Node.Expression {
        assert(this.context.allowIn, 'callee of new expression always allow in keyword.');

        const node = this.startNode(this.lookahead);
        let expr = (this.matchKeyword('super') && this.context.inFunctionBody) ? this.parseSuper() :
            this.inheritCoverGrammar(this.matchKeyword('new') ? this.parseNewExpression : this.parsePrimaryExpression);

        while (true) {
            if (this.match('[')) {
                this.context.isBindingElement = false;
                this.context.isAssignmentTarget = true;
                this.expect('[');
                const property = this.isolateCoverGrammar(this.parseExpression);
                this.expect(']');
                expr = this.finalize(node, new Node.ComputedMemberExpression(expr, property));

            } else if (this.match('.')) {
                this.context.isBindingElement = false;
                this.context.isAssignmentTarget = true;
                this.expect('.');
                const property = this.parseIdentifierName();
                expr = this.finalize(node, new Node.StaticMemberExpression(expr, property));

            } else if (this.lookahead.type === Token.Template && this.lookahead.head) {
                const quasi = this.parseTemplateLiteral();
                expr = this.finalize(node, new Node.TaggedTemplateExpression(expr, quasi));

            } else {
                break;
            }
        }

        return expr;
    }

    // https://tc39.github.io/ecma262/#sec-update-expressions