Function readCodePoint

packages/babel-parser/src/tokenizer/index.ts:1251–1262

(throwOnInvalid: boolean)

  // Read a string value, interpreting backslash-escapes.

  readCodePoint(throwOnInvalid: boolean): number | null {
    const { code, pos } = readCodePoint(
      this.input,
      this.state.pos,
      this.state.lineStart,
      this.state.curLine,
      throwOnInvalid,
      this.errorHandlers_readCodePoint,
    );
    this.state.pos = pos;
    return code;
  }

  readString(quote: number): void {
    const { str, pos, curLine, lineStart } = readStringContents(