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"}


Versions [RSS] [faq] 0, 0.0.0.1, 0.0.1, 0.0.2, 0.0.2.1, 0.1, 0.2, 0.2.1 ChangeLog.md aeson (>=1.2.1.0 && <1.5), ansi-terminal (>=0.6.3.1 && <0.9), ansi-wl-pprint (>=0.6.8.1 && <0.7), base (>=4.7 && <4.13), base-compat (>=0.9.3 && <0.11), bytestring (>=0.10.4.0 && <0.11), containers (>=0.5.5.1 && <0.7), generics-sop (>=0.3.1.0 && <0.5), hashable (>=1.2.6.1 && <1.3), MemoTrie (>=0.6.8 && <0.7), nats (>=1.1.1 && <1.2), parsec (>=3.1.11 && <3.2), parsers (>=0.12.7 && <0.13), pretty (>=1.1.1.1 && <1.2), QuickCheck (>=2.10.0.1 && <2.13), scientific (>=0.3.5.2 && <0.4), semigroups (>=0.18.3 && <0.19), tagged (>=0.8.5 && <0.9), text (>=1.2.2.2 && <1.3), time (>=1.4.2 && <1.9), transformers (>=0.3.0.0 && <0.6), unordered-containers (>=0.2.8.0 && <0.3), uuid-types (>=1.0.3 && <1.1), vector (==0.12.*), void (>=0.7.2 && <0.8) [details] BSD-3-Clause (c) 2017 Oleg Grenrus Oleg Grenrus Oleg.Grenrus Revision 6 made by phadej at 2018-10-24T11:22:29Z Data https://github.com/phadej/tree-diff https://github.com/phadej/tree-diff/issues head: git clone https://github.com/phadej/tree-diff.git by phadej at 2018-01-11T10:42:58Z Arch:0.2.1, LTSHaskell:0.2.1, NixOS:0.2, Stackage:0.2.1 15165 total (870 in the last 30 days) 2.25 (votes: 2) [estimated by Bayesian average] λ λ λ Docs available Last success reported on 2018-01-13

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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: