bullseye 0.1.1

  • README.md
  • Example
  • Installing
  • Versions
  • 50


Bullseye is a new flavour of regex for Dart, because JavaScript's regex flavour sucks quite a lot.

Some things Bullseye has that JS regex doesn't:

  • Lookbehinds (positive and negative)
  • Variable-length lookaheads

Possible features:

  • Named capturing groups
  • Backtracking
  • Recursion (probably not)


A simple usage example:

import 'package:bullseye/bullseye.dart';

void main() {
  NewRegex dart = new NewRegex("ab*");

  print(dart.allMatches("ababbaa")); // => ["ab", "abb", "a", "a"]

Features and bugs

Please file feature requests and bugs at the issue tracker.



  • Implemented base regex lib
  • Added support for lookbehinds


  • Initial version, created by Stagehand


// Copyright (c) 2017, Hanyuan Li. All rights reserved. Use of this source code
// is governed by a BSD-style license that can be found in the LICENSE file.

import 'package:bullseye/bullseye.dart';
import "dart:convert";

void main() {
  NewRegex test = new NewRegex("(?<=a)b*");


Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  bullseye: "^0.1.1"

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter packages get

Alternatively, your editor might support pub get or flutter packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

      import 'package:bullseye/bullseye.dart';
Version Uploaded Documentation Archive
0.1.1 Jul 19, 2017 Go to the documentation of bullseye 0.1.1 Download bullseye 0.1.1 archive
0.1.0 Jul 19, 2017 Go to the documentation of bullseye 0.1.0 Download bullseye 0.1.0 archive


We analyzed this package on Jun 19, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.0.0-dev.63.0
  • pana: 0.11.3


Describes how popular the package is relative to other packages. [more]
0 / 100
Code health derived from static analysis. [more]
100 / 100
Reflects how tidy and up-to-date the package is. [more]
100 / 100
Overall score:
Weighted score of the above. [more]
Learn more about scoring.


Detected platforms: Flutter, web, other

No platform restriction found in primary library package:bullseye/bullseye.dart.


  • The description is too short.

    Add more detail about the package, what it does and what is its target use case. Try to write at least 60 characters.

  • Package is pre-v1 release.

    While there is nothing inherently wrong with versions of 0.*.*, it usually means that the author is still experimenting with the general direction API.

  • Fix analysis and formatting issues.

    Analysis or formatting checks reported 1 hint.

    Strong-mode analysis of lib/src/Methods.dart gave the following hint:

    line: 96 col: 20
    'UTF8' is deprecated and shouldn't be used.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.20.1 <2.0.0
Dev dependencies
test ^0.12.0