private scanRegExpFlags()

in src/scanner.ts [1188:1226]

• 37 lines of code
• 8 McCabe index (conditional complexity)

    private scanRegExpFlags(): string {
        let str = '';
        let flags = '';
        while (!this.eof()) {
            let ch = this.source[this.index];
            if (!Character.isIdentifierPart(ch.charCodeAt(0))) {
                break;
            }

            ++this.index;
            if (ch === '\\' && !this.eof()) {
                ch = this.source[this.index];
                if (ch === 'u') {
                    ++this.index;
                    let restore = this.index;
                    const char = this.scanHexEscape('u');
                    if (char !== null) {
                        flags += char;
                        for (str += '\\u'; restore < this.index; ++restore) {
                            str += this.source[restore];
                        }
                    } else {
                        this.index = restore;
                        flags += 'u';
                        str += '\\u';
                    }
                    this.tolerateUnexpectedToken();
                } else {
                    str += '\\';
                    this.tolerateUnexpectedToken();
                }
            } else {
                flags += ch;
                str += ch;
            }
        }

        return flags;
    }