trifecta

A modern parser combinator library with convenient diagnostics

http://github.com/ekmett/trifecta/

Version on this page:1.6.2.1@rev:1
LTS Haskell 24.19:2.1.4@rev:2
Stackage Nightly 2025-11-13:2.1.4@rev:2
Latest on Hackage:2.1.4@rev:2

See all snapshots trifecta appears in

BSD-3-Clause licensed by Edward A. Kmett
Maintained by Edward A. Kmett
This version can be pinned in stack with:trifecta-1.6.2.1@sha256:595264c914f39eacce55e580cae50d488855e3db9015f7d2754040613bb6c263,2959

Module documentation for 1.6.2.1

trifecta

Hackage Build Status

This package provides a parser that focuses on nice diagnostics.

Contact Information

Contributions and bug reports are welcome!

Please feel free to contact me through github or on the #haskell IRC channel on irc.freenode.net.

-Edward Kmett

Changes

1.6.2.1

  • Add this changelog to the extra-souce-files in trifecta.cabal so that the changelog will appear on Hackage

1.6.2

  • Enable support for blaze-html-0.9 and blaze-markup-0.8

1.6.1

  • Remove redundant constraints from DeltaParsing’s class methods. This is required for trifecta to build on GHC 8.0.2.

1.6

  • Version bumps to support GHC 8
  • Add line/col numbers to parse results by giving a list of all deltas when errors happen.

1.5.2

  • lens 4.13 support
  • It is a Profunctor
  • Builds clean on GHC 7.10.

1.5.1.3

  • Support newer utf8-string versions and GHC 7.10

1.5.1.2

  • Work around lack of the old preEscapedString export in near-current blaze-markup.

1.5.1.1

  • Work around new exports in blaze.

1.5.1

  • Parsers 0.12.1 support. This removes many Show constraints introduced after 1.4

1.5

  • Properly PVP compliant point release for the parsers changes to properly handle notFollowedBy

1.4.3

  • Accidentally non-PVP compliant point release.

1.4.1

  • GHC 7.8.1 compatibility

1.4

  • Simplified AsResult
  • lens 4.0 compatibility

1.2.1.1

  • Updated array dependency for compatibility with GHC 7.8

1.2.1

  • Bug fix for the Monoid instance in response to issue #15
  • Made the Semigroup instance match the Monoid as well.

1.2

  • Changed the Monoid instance for Parser in response to issue #14
  • Exported MonadErr class for raising Errs