Function getFunctionBase

lib/internal/util/inspect.js:1572–1609

(ctx, value, constructor, tag)

}

function getFunctionBase(ctx, value, constructor, tag) {
  const stringified = FunctionPrototypeToString(value);
  if (StringPrototypeStartsWith(stringified, 'class') && stringified[stringified.length - 1] === '}') {
    const slice = StringPrototypeSlice(stringified, 5, -1);
    const bracketIndex = StringPrototypeIndexOf(slice, '{');
    if (bracketIndex !== -1 &&
        (!StringPrototypeIncludes(StringPrototypeSlice(slice, 0, bracketIndex), '(') ||
        // Slow path to guarantee that it's indeed a class.
        RegExpPrototypeExec(classRegExp, RegExpPrototypeSymbolReplace(stripCommentsRegExp, slice)) !== null)
    ) {
      return getClassBase(value, constructor, tag);
    }
  }
  let type = 'Function';
  if (isGeneratorFunction(value)) {
    type = `Generator${type}`;
  }
  if (isAsyncFunction(value)) {
    type = `Async${type}`;
  }
  let base = `[${type}`;
  if (constructor === null) {
    base += ' (null prototype)';
  }
  if (value.name === '') {
    base += ' (anonymous)';
  } else {
    base += `: ${typeof value.name === 'string' ? value.name : formatValue(ctx, value.name)}`;
  }
  base += ']';
  if (constructor !== type && constructor !== null) {
    base += ` ${constructor}`;
  }
  if (tag !== '' && constructor !== tag) {
    base += ` [${tag}]`;
  }
  return base;
}

function identicalSequenceRange(a, b) {
  for (let i = 0; i < a.length - 3; i++) {