Method parseIdentifier

src/common/json5.ts:239–260

()

  }

  private parseIdentifier(): any {
    const start = this.index;
    // An identifier can start with a letter, underscore, or dollar sign.
    const firstChar = this.currentChar();
    if (!/[a-zA-Z$_]/.test(firstChar)) {
      throw this.error(`Unexpected token '${firstChar}'`);
    }
    this.index++;
    while (!this.isAtEnd()) {
      const ch = this.currentChar();
      if (!/[a-zA-Z0-9$_]/.test(ch)) break;
      this.index++;
    }
    const token = this.text.slice(start, this.index);
    // Recognize standard literals.
    if (token === 'true') return true;
    if (token === 'false') return false;
    if (token === 'null') return null;
    if (token === 'Infinity') return Infinity;
    if (token === 'NaN') return NaN;
    return token;
  }

  skipWhitespace(): void {
    while (!this.isAtEnd()) {