tree-diff: Diffing of (expression) trees.

[ data, gpl, library, testing ] [ Propose Tags ]

Common diff algorithm works on list structures:

diff :: Eq a => [a] -> [a] -> [Edit a]

This package works on trees.

treeDiff :: Eq a => Tree a -> Tree a -> Edit (EditTree a)

This package also provides a way to diff arbitrary ADTs, using Generics-derivable helpers.

This package differs from gdiff, in a two ways: tree-diff doesn't have patch function, and the "edit-script" is a tree itself, which is useful for pretty-printing.

>>> prettyEditExpr $ ediff (Foo 42 [True, False] "old") (Foo 42 [False, False, True] "new")
Foo
  {fooBool = [-True, +False, False, +True],
   fooInt = 42,
   fooString = -"old" +"new"}

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Versions [faq] 0, 0.0.0.1, 0.0.1, 0.0.2, 0.0.2.1, 0.1
Change log ChangeLog.md
Dependencies aeson (>=1.4.0.0 && <1.5), ansi-terminal (>=0.8.2 && <0.9 || >=0.9.1 && <0.10), ansi-wl-pprint (>=0.6.8.2 && <0.7), base (>=4.5 && <4.13), base-compat (>=0.10.5 && <0.11), bytestring (>=0.9.2.1 && <0.10 || >=0.10.0.2 && <0.11), bytestring-builder (>=0.10.8.2.0 && <0.11), containers (>=0.4.2.1 && <0.5 || >=0.5.0.0 && <0.6 || >=0.6.0.1 && <0.7), generic-deriving (>=1.12.4 && <1.13), ghc-prim, hashable (>=1.2.7.0 && <1.3 || >=1.3.0.0 && <1.4), nats (>=1.1.2 && <1.2), parsec (>=3.1.13.0 && <3.2), parsers (>=0.12.10 && <0.13), pretty (>=1.1.1.0 && <1.2), QuickCheck (>=2.12.6.1 && <2.13 || >=2.13.1 && <2.14), scientific (>=0.3.6.2 && <0.4), semigroups (>=0.18.5 && <0.20), tagged (>=0.8.6 && <0.9), text (>=1.2.3.0 && <1.3), time (==1.4.* || >=1.5.0.1 && <1.6 || >=1.6.0.1 && <1.7 || >=1.8.0.2 && <1.9), transformers (>=0.3.0.0 && <0.4 || >=0.4.2.0 && <0.5 || >=0.5.2.0 && <0.6), unordered-containers (>=0.2.8.0 && <0.3), uuid-types (>=1.0.3 && <1.1), vector (==0.12.*), void (>=0.7.3 && <0.8) [details]
License GPL-2.0-or-later
Copyright (c) 2017-2019 Oleg Grenrus
Author Oleg Grenrus <oleg.grenrus@iki.fi>
Maintainer Oleg.Grenrus <oleg.grenrus@iki.fi>
Category Data, Testing
Home page https://github.com/phadej/tree-diff
Bug tracker https://github.com/phadej/tree-diff/issues
Source repo head: git clone https://github.com/phadej/tree-diff.git
Uploaded by phadej at Wed May 29 07:46:25 UTC 2019
Distributions Arch:0.1, LTSHaskell:0.0.2.1, NixOS:0.1, Stackage:0.1
Downloads 1968 total (97 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by rule of succession]
Your Rating
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2019-05-29 [all 1 reports]

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Readme for tree-diff-0.1

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tree-diff

Diffing of (expression) trees.

Examples

tree-diff displays pretty diffs of tree data:

Because of its untyped internal type, it copes with type changes:

As a bonus, multiline Strings and Text are diffed linewise: