Method astErrorOutput

src/backend/function-node.js:963–973

* @desc To throw the AST error, with its location. * @param {string} error - the error message output * @param {Object} ast - the AST object where the error is

(error, ast)

   * @param {Object} ast - the AST object where the error is
   */
  astErrorOutput(error, ast) {
    if (typeof this.source !== 'string') {
      return new Error(error);
    }

    const debugString = utils.getAstString(this.source, ast);
    const leadingSource = this.source.substr(ast.start);
    const splitLines = leadingSource.split(/\n/);
    const lineBefore = splitLines.length > 0 ? splitLines[splitLines.length - 1] : 0;
    return new Error(`${error} on line ${ splitLines.length }, position ${ lineBefore.length }:\n ${ debugString }`);
  }

  astDebuggerStatement(arrNode, retArr) {
    return retArr;