Replaced each of the different SimpleFoo type aliases with Foo' throughout. The various Simple aliases can still be found in Control.Lens.Simple but are now deprecated.
Made sweeping changes to Iso and Prism and Indexed lenses internally. They are now based on profunctors. This affects how you use indexed in the resulting code and dramatically changed the meaning of Overloaded.
Generalized combinators to pass through indices unmodified wherever possible and added indexed variants to existing combinators. There are hundreds of these changes and they would swamp this list.
This module was created to add combinators and prisms that make it possible to work with GHC's extensible exceptions and monad transformer stacks more easily. There are knock-on changes in Data.Dynamic.Lens, System.Exit.Lens, and System.IO.Error.Lens.
Moved At(at) and Contains(contains) and factored out Ixed(ix).
Deprecated _at and resultAt.
Removed various ordinal and ix combinators, which are subsumed by Ixed(ix).
Consoldiated the various _head, _tail, _init and _last traversals that were scattered around the place into a pair of Cons and Snoc classes that provide _Cons and _Snoc prisms respectively, and combinators that build on top.
Generalized the signature of Each to permit it to provide an IndexedSetter for ((->) e).
Each now uses an Index type family that is shared with At, Ixed and Contains to indicate these operations are related.
Added as a stronger form of Iso that can be used to safely cast.
Added the adverb simply, which can be used to simplify the types of most combinators in the library so they only take a simple lens, simple traversal, etc as their first argument instead. e.g. simply view forces a ~ b, s ~ t in the argument to view.
Added foldr1Of' and foldl1Of'.
Added has and hasn't.
The various indexed combinators for each type were distributed to their respective modules. This module grew to encompass the remaining index-specifics.
Added index and indices, and removed iwhere and iwhereOf. Use itraversed.indices even and bar.indices (>3) instead.
This module was exploded into more manageable component modules.
Strict(strict) is now a Simple Iso.
Added magma and imagma which can be used to provide a 'debugging view' of a Traversal.
Restructuring split this module out from Control.Lens.Type and merged the contents Control.Lens.IndexedLens.
This module was created to provide the breadth-first-search Traversals levels and ilevels which can be used to do (optionally depth-limited) breadth-first searches through arbitrary traversals reaching all leaves at finite depth in finite time. To use these in full accordance with the laws you should restrict yourself to commutative operations and finite containers, but they are useful even in the absence of these properties.
In the interest of consistency, the Loupe alias has been deprecated in favor of ALens.
Loupe (and ALens) are now defined in terms of Pretext rather than Context. This permits them to be cloned at a reduced cost reducing the call for ReifiedLens.
Added this module for users who insist on qualified use, but want access to the operators. They can import qualified Control.Lens as Lens and import Control.Lens.Operators unqualified.
Added prism' to construct SimplePrisms.
Consolidated the various ReifiedFoo definitions into one module.
This module was removed. Its functionality may be split out into a separate package, but currently the linear package exports is own Linear.Core module to provide this functionality. It was taking lots of useful names for little functionality and didn't feel like the rest of the API.
This module now factors the review functionality out of Prism and exposes unto, which is to review what to is to view.
Added contramapped and argument for mapping over inputs.
Removed the infix lens aliases and repurposed the module to house the now deprecated SimpleFoo type aliases, which were replaced universally with Foo'.
makeLenses now generates Lens' and Traversal' where appropriate
Added makePrisms as a generalized makeIso that automatically generates a Prism for each constructor. makePrisms generates names with an _Foo convention. This was consolidated upon throughout the library to reduce namespace conflicts between prisms and lenses.
Added makeFields, which generates classes for each individual field in a data type.
Added makeWrapped, which automatically generates a Wrapped instance for a newtype.
This module was repurposed to provide a single home for all the standard lens-like type aliases used when producing lenses. You still need to go to their respective modules to find the types for consuming lens-likes if you want to generate your own lens combinators
Added wrapped' and unwrapped' for scenarios where you need the help with type inference.
Converted Zipper to walk a magma based on the original structure and to use indices from indexed traversals when restoring from tape. This also means that when zipping around within a balanced structure with ascending keys moveTo can operate in logarithmic time, but required changing the Zipper type to add the index type.
Data.ByteString.Lazy.Lens now uses Int64-based indexing.
The Traversal for strict ByteStrings now construct a balanced tree up to a given grain size. This permits zipper based seeking to operate in logarithmic time and speeds up many traversals.
Created. base shows and reads integers at base-2 through base-36. integral can be used as a safe fromInteger/toInteger.
3.7.3 [maintenance release]
Removed my intra-package dependency upper bounds for my own packages. In particular this enables us to work with semigroups 0.9.
Switched to transformers-compat to avoid having unbuilding modules at the top of the documentation, and to ease 3rd party compatibility.
Updated Setup.lhs to be compatible with Cabal 1.17
3.7.2 [maintenance release]
Bug fix for Magnify. It was missing functional dependencies to determine its k parameter from m or n.
18.104.22.168 [maintenance release]
Made the doctest test suite hide all but the exact versions of packages used to build this package to avoid problems with complicated user environments.
Removed doctests based on :t as they are fragile and break across GHC versions.
Fixed GHC 7.0.4 compatibility by guarding DefaultSignatures in Control.Lens.Each.
22.214.171.124 [maintenance release]
Removed tests that will (likely) fail in the presence of hashable 1.2
Added preuse, preuses to Control.Lens.Fold
Added Each(each) to Control.Lens.Each for indexed traversal of potentially monomorphic containers.
Added indexing64 and traversed64 for help with large containers.
Generalized the type signature of choosing.
Exported unwrapped from Control.Lens.Wrapped.
Support for hashable 1.2
Added (??) to Control.Lens.Combinators.
Fixed flagging for Safe Haskell.
Cleaned up the statement of the Prism laws.
Corrected bounds for hashable.
Fixed compatibility with Haskell Platform 2011.4.0.0 -- you may have to install with --constraint="transformers = 0.2.2.0" to avoid getting new mtl and transformer versions installed.
Added upon (along with variants of it) to Data.Data.Lens, which can be used to generate a Traversal from a field accessor or any function that returns, unmodified,
a single field that would be visited by template.
Added some missing examples/ files to the distribution.
Renamed Data.Bits.Lens.traverseBits to bits.
Removed (^!?), which was an alias for (^?!).
Removed the need for Trustworthy by changing the implementation of coerce for BazaarT.
Moved BazaarT to Control.Lens.Internal.
Added (<&>) to Control.Lens.Combinators.
element and elementOf are now indexed traversals rather than lenses and have moved to Control.Lens.IndexedTraversal. This both fixes their former partiality and lets you use chain indexed combinators with them.
Added elements and elementsOf as indexed traversals for ordinal indexing into regular traversals that generalize element and elementOf.
Renamed Data.Complex.Lens.traverseComplex to complex.
Changed Data.Complex.Lens.polarize to a Simple Iso, due to the RealFloat constraint causing inference problems.
Renamed traverseLeft and traverseRight to _left and _right respectively.
Renamed traverseSlice, traverseFrom, and traverseTo in Data.Sequence.Lens to sliced, slicedFrom, and slicedTo respectively.
Renamed traverseAt to _at in Control.Lens.IndexedTraversal.
Renamed traverseArray to _array in Data.Array.Lens.
Renamed and made the combinators in Control.Lens.Zipper more compositional to reduce third-party naming conflicts down to just left and right.
Renamed &= and |= to .&.= and .|.= for consistency, mutatis mutandis their related operations.
Added a Plated instances for Language.Haskell.TH types.
Renamed atIndex and atIndices in Data.Vector.Lens and Data.Vector.Generic.Lens to ordinal and ordinals to match Data.Sequence.Lens
Fixed a potential SafeHaskell issue where a user could use undefined to derive unsafeCoerce. You now have to import an explicitly
Unsafe module and create an instance of Trustworthy for your type to cause this behavior, so if you do, it's on your head, not mine. :)
Renamed EvilBazaar to BazaarT.
Moved a lot of internals around. Most notably, Gettable, Settable and Effective have moved to Control.Lens.Classes.
Exposed partsOf' and unsafePartsOf' in Control.Lens.Traversal to reduce reliance on BazaarT in Control.Lens.Zipper
Renamed (%) to (&) and (^%) to (^&). This avoids the conflict with Data.Ratio, which was our highest priority conflict with a third party library.
Switched to a more liberal type for ignored
Removed some "isplitting" bad combinators from Control.Lens.IndexedFold.
Made indexed, taking, and dropping and elementOf lazier and capable of dealing with infinite traversals and infinite folds.
Improved Indexing to support infinite traversals and folds.
Removed some of the more redundant combinators from Control.Lens.Plated, which already had existing aliases in the rest of the traversal API.
Moved partsOf, holesOf, and elementOf into Control.Lens.Traversal.
Renamed query to peruse and queries to peruses. These are much less contentious names,
both contain use in their name for analogy to use and uses and the word is about reading.
Added enum and non to Control.Lens.Iso.
Added (^?!) to Control.Lens.Fold for unsafe access to the head of a Fold.
Changed _head, _tail, _init and _last to traversals in Data.List.Lens and Data.Sequence.Lens.
Eliminated traverseHead, traverseTail, traverseInit and traverseLast.
partsOf and unsafePartsOf can now also be applied to a Fold yielding a Getter or to a MonadicFold yielding an Action.
Redefined simple and moved it to Control.Lens.Iso. Instead of using simple l you can now compose l.simple or simple.l providing more nuanced control and a more compositional API.
Moved the various foo# combinators used to emit cleaner core into an unexported module, Control.Lens.Unsafe. This removes MagicHash from the public API.
Removed the bazaar# and runBazaar# coercions that caused issues on GHC HEAD.
Changed the default definition of plate to uniplate from ignored.
Added Data.Vector.Lens and instances for Data.Vector.
Added support for the split package, which is now part of the Haskell platform.
Removed redundant Data.List.traverseList. Use itraversed or traverse instead.
Moved (:<->) to Control.Lens.Simple.
Fixed a bug in Control.Lens.TH that was causing makeIso not to work.
Added lifted to Control.Lens.Setter for mapping over monads.
Added beside to Control.Lens.Traversal.
Removed the operators from Data.List.Lens, they broke the overall pattern of the rest of the API, and were terrible clutter.
Fixed a bug that caused resultAt to give wrong answers most of the time.
Changed resultAt to an IndexedLens and moved it to Control.Lens.IndexedLens
Changed ignored to an IndexedTraversal and moved it to Control.Lens.IndexedTraversal
We've relinquished the name value.
Made elementOf lazier and moved it from Control.Lens.Traversal to Control.Lens.Plated.
Made holesOf and partsOf lazier to deal with infinite structures.
Resolved issue #75. We now generate nicer core for most Setter and Fold operations, and some others.
Made lenses for field access like _1, _2, etc. lazier.
Added Control.Lens.Loupe, which provides a limited form of Lens that can be read from and written to and which can compose
with other lenses, but can also be returned in a list or as a monadic result, but cannot be used directly for most combinators
without cloning it first. It is easier to compose than a ReifiedLens, but slightly slower.
Moved (:=>) and (:->) into Control.Lens.Simple, which is not exported by Control.Lens by default to reduce name conflicts with third party libraries.
Simplified the type of filtered, so that it can be composed with other folds rather than be parameterized on one. Included the caveat that the new filtered is still not a legal Traversal, despite seeming to compose like one.
Renamed ifiltered to ifiltering, and while it still must take an indexed lens-like as an argument, I included a similar caveat about the result not being a legal IndexedLens when given an IndexedLens. The function was renamed because its signature no longer lined up with the new filtered and the gerundive '-ing' suffix has come to indicate an operator that transformers another lens/traversal/etc. into a new one.
Added taking and dropping to Control.Lens.Traversal.
Alpha-renamed all combinators to a new scheme. Instead of Foo a b c d, they now follow Foo s t a b. This means that you don't need to alpha rename everything in your head to work through the examples, simplifies exposition, and uses s and t for common state monad parameters. Thanks go to Shachaf Ben-Kiki for the grunt work of slogging through hundreds of definitions by hand and with regular expressions!
Restored lenses to Trustworthy status so they can be used with Safe Haskell once more.
Fixed a bug in rights1 and lefts1 in Control.Lens.Zipper which would cause them to loop forever when given a 0 offset.
Added ?~, <?~, ?= and <?= to Control.Lens.Setter for setting the target(s) of a Lens to Just a value. They are particularly useful when combined with at.
Refined the behavior of substType in Control.Lens.TH to match the behavior of typeVarsEx when moving under binders.
Added generateSignatures option to Control.Lens.TH to allow the end user to disable the generation of type signatures for the
template-haskell generated lenses. This lets the user supply hand-written haddocks and more restricted signatures.
Added <<%~, <<.~, <<%= and <<.= for accessing the old values targeted by a Lens (or a summary of those targeted by a Traversal)
Renamed |> to %, as %~ is the lensed version of %, and moved it to Control.Lens.Getter along with a version ^% with tighter
precedence that can be interleaved with ^.
Upgraded to doctest 0.9, which lets us factor out common $setup for our doctests
Renamed merged to choosing. Added a simpler chosen operation to mirror both.
Renamed traverseException to exception and traverseDynamic to dynamic, upgrading them to use Projection.
makeClassy now places each generated Lens or Traversal inside the class it constructs when possible.
This makes it possible for users to just export HasFoo(..), rather than have to enumerate each lens in
the export list. It can only do that if it creates the class. If the createClass flag is disabled, then
it will default to the old behavior.
Added performs to Control.Lens.Action to mirror views in Control.Lens.Getter.