Method parseBreakStatement

src/parser.ts:2376–2397

()

    // https://tc39.github.io/ecma262/#sec-break-statement

    parseBreakStatement(): Node.BreakStatement {
        const node = this.createNode();
        this.expectKeyword('break');

        let label: Node.Identifier | null = null;
        if (this.lookahead.type === Token.Identifier && !this.hasLineTerminator) {
            const id = this.parseVariableIdentifier();

            const key = '$' + id.name;
            if (!Object.prototype.hasOwnProperty.call(this.context.labelSet, key)) {
                this.throwError(Messages.UnknownLabel, id.name);
            }
            label = id;
        }

        this.consumeSemicolon();
        if (label === null && !this.context.inIteration && !this.context.inSwitch) {
            this.throwError(Messages.IllegalBreak);
        }

        return this.finalize(node, new Node.BreakStatement(label));
    }

    // https://tc39.github.io/ecma262/#sec-return-statement