Function getErrorSourceLocation

lib/internal/errors/error_source.js:26–59

* Get the source location of an error. If source map is enabled, resolve the source location * based on the source map. * * The `error.stack` must not have been accessed. The resolution is based on the structured * error stack data. * @param {Error|object} error An error object, or an object be

(error)

 * @returns {{sourceLine: string, startColumn: number}|undefined}
 */
function getErrorSourceLocation(error) {
  const pos = getErrorSourcePositions(error);
  const {
    sourceLine,
    scriptResourceName,
    lineNumber,
    startColumn,
  } = pos;

  // Source map is not enabled. Return the source line directly.
  if (!getSourceMapsSupport().enabled) {
    return { sourceLine, startColumn };
  }

  const sm = findSourceMap(scriptResourceName);
  if (sm === undefined) {
    return;
  }
  const {
    originalLine,
    originalColumn,
    originalSource,
  } = sm.findEntry(lineNumber - 1, startColumn);
  const originalSourceLine = getSourceLine(sm, originalSource, originalLine, originalColumn);

  if (!originalSourceLine) {
    return;
  }

  return {
    sourceLine: originalSourceLine,
    startColumn: originalColumn,
  };
}

const memberAccessTokens = [ '.', '?.', '[', ']' ];
const memberNameTokens = [ 'name', 'string', 'num' ];