Add .stylish-haskell.yaml that matches Tom's preferences

to be automatically applied at buffer save or periodically applied with
find -not -path '*/\.git/*' -name "*.hs" -type f| xargs stylish-haskell -i

9 files changed, 461 insertions, 9 deletions

diff --git a/.stylish-haskell.yaml b/.stylish-haskell.yaml
new file mode 100644
index 0000000..bfd25ea
--- /dev/null
+++ b/.stylish-haskell.yaml
@@ -0,0 +1,452 @@
+# stylish-haskell configuration file
+# ==================================
+
+# The stylish-haskell tool is mainly configured by specifying steps. These steps
+# are a list, so they have an order, and one specific step may appear more than
+# once (if needed). Each file is processed by these steps in the given order.
+steps:
+  # Convert some ASCII sequences to their Unicode equivalents. This is disabled
+  # by default.
+  # - unicode_syntax:
+  #     # In order to make this work, we also need to insert the UnicodeSyntax
+  #     # language pragma. If this flag is set to true, we insert it when it's
+  #     # not already present. You may want to disable it if you configure
+  #     # language extensions using some other method than pragmas. Default:
+  #     # true.
+  #     add_language_pragma: true
+
+  # Format module header
+  #
+  # Currently, this option is not configurable and will format all exports and
+  # module declarations to minimize diffs
+  #
+  # - module_header:
+  #     # How many spaces use for indentation in the module header.
+  #     indent: 4
+  #
+  #     # Should export lists be sorted?  Sorting is only performed within the
+  #     # export section, as delineated by Haddock comments.
+  #     sort: true
+  #
+  #     # See `separate_lists` for the `imports` step.
+  #     separate_lists: true
+
+  # Format record definitions. This is disabled by default.
+  #
+  # You can control the layout of record fields. The only rules that can't be configured
+  # are these:
+  #
+  # - "|" is always aligned with "="
+  # - "," in fields is always aligned with "{"
+  # - "}" is likewise always aligned with "{"
+  #
+  # - records:
+  #     # How to format equals sign between type constructor and data constructor.
+  #     # Possible values:
+  #     # - "same_line" -- leave "=" AND data constructor on the same line as the type constructor.
+  #     # - "indent N" -- insert a new line and N spaces from the beginning of the next line.
+  #     equals: "indent 2"
+  #
+  #     # How to format first field of each record constructor.
+  #     # Possible values:
+  #     # - "same_line" -- "{" and first field goes on the same line as the data constructor.
+  #     # - "indent N" -- insert a new line and N spaces from the beginning of the data constructor
+  #     first_field: "indent 2"
+  #
+  #     # How many spaces to insert between the column with "," and the beginning of the comment in the next line.
+  #     field_comment: 2
+  #
+  #     # How many spaces to insert before "deriving" clause. Deriving clauses are always on separate lines.
+  #     deriving: 2
+  #
+  #     # How many spaces to insert before "via" clause counted from indentation of deriving clause
+  #     # Possible values:
+  #     # - "same_line" -- "via" part goes on the same line as "deriving" keyword.
+  #     # - "indent N" -- insert a new line and N spaces from the beginning of "deriving" keyword.
+  #     via: "indent 2"
+  #
+  #     # Sort typeclass names in the "deriving" list alphabetically.
+  #     sort_deriving: true
+  #
+  #     # Wheter or not to break enums onto several lines
+  #     #
+  #     # Default: false
+  #     break_enums: false
+  #
+  #     # Whether or not to break single constructor data types before `=` sign
+  #     #
+  #     # Default: true
+  #     break_single_constructors: true
+  #
+  #     # Whether or not to curry constraints on function.
+  #     #
+  #     # E.g: @allValues :: Enum a => Bounded a => Proxy a -> [a]@
+  #     #
+  #     # Instead of @allValues :: (Enum a, Bounded a) => Proxy a -> [a]@
+  #     #
+  #     # Default: false
+  #     curried_context: false
+
+  # Align the right hand side of some elements.  This is quite conservative
+  # and only applies to statements where each element occupies a single
+  # line.
+  # Possible values:
+  # - always - Always align statements.
+  # - adjacent - Align statements that are on adjacent lines in groups.
+  # - never - Never align statements.
+  # All default to always.
+  - simple_align:
+      cases: never
+      top_level_patterns: never
+      records: never
+      multi_way_if: never
+
+  # Import cleanup
+  - imports:
+      # There are different ways we can align names and lists.
+      #
+      # - global: Align the import names and import list throughout the entire
+      #   file.
+      #
+      # - file: Like global, but don't add padding when there are no qualified
+      #   imports in the file.
+      #
+      # - group: Only align the imports per group (a group is formed by adjacent
+      #   import lines).
+      #
+      # - none: Do not perform any alignment.
+      #
+      # Default: global.
+      align: group
+
+      # The following options affect only import list alignment.
+      #
+      # List align has following options:
+      #
+      # - after_alias: Import list is aligned with end of import including
+      #   'as' and 'hiding' keywords.
+      #
+      #   > import qualified Data.List      as List (concat, foldl, foldr, head,
+      #   >                                          init, last, length)
+      #
+      # - with_alias: Import list is aligned with start of alias or hiding.
+      #
+      #   > import qualified Data.List      as List (concat, foldl, foldr, head,
+      #   >                                 init, last, length)
+      #
+      # - with_module_name: Import list is aligned `list_padding` spaces after
+      #   the module name.
+      #
+      #   > import qualified Data.List      as List (concat, foldl, foldr, head,
+      #                          init, last, length)
+      #
+      #   This is mainly intended for use with `pad_module_names: false`.
+      #
+      #   > import qualified Data.List as List (concat, foldl, foldr, head,
+      #                          init, last, length, scanl, scanr, take, drop,
+      #                          sort, nub)
+      #
+      # - new_line: Import list starts always on new line.
+      #
+      #   > import qualified Data.List      as List
+      #   >     (concat, foldl, foldr, head, init, last, length)
+      #
+      # - repeat: Repeat the module name to align the import list.
+      #
+      #   > import qualified Data.List      as List (concat, foldl, foldr, head)
+      #   > import qualified Data.List      as List (init, last, length)
+      #
+      # Default: after_alias
+      list_align: after_alias
+
+      # Right-pad the module names to align imports in a group:
+      #
+      # - true: a little more readable
+      #
+      #   > import qualified Data.List       as List (concat, foldl, foldr,
+      #   >                                           init, last, length)
+      #   > import qualified Data.List.Extra as List (concat, foldl, foldr,
+      #   >                                           init, last, length)
+      #
+      # - false: diff-safe
+      #
+      #   > import qualified Data.List as List (concat, foldl, foldr, init,
+      #   >                                     last, length)
+      #   > import qualified Data.List.Extra as List (concat, foldl, foldr,
+      #   >                                           init, last, length)
+      #
+      # Default: true
+      pad_module_names: false
+
+      # Long list align style takes effect when import is too long. This is
+      # determined by 'columns' setting.
+      #
+      # - inline: This option will put as much specs on same line as possible.
+      #
+      # - new_line: Import list will start on new line.
+      #
+      # - new_line_multiline: Import list will start on new line when it's
+      #   short enough to fit to single line. Otherwise it'll be multiline.
+      #
+      # - multiline: One line per import list entry.
+      #   Type with constructor list acts like single import.
+      #
+      #   > import qualified Data.Map as M
+      #   >     ( empty
+      #   >     , singleton
+      #   >     , ...
+      #   >     , delete
+      #   >     )
+      #
+      # Default: inline
+      long_list_align: new_line_multiline
+
+      # Align empty list (importing instances)
+      #
+      # Empty list align has following options
+      #
+      # - inherit: inherit list_align setting
+      #
+      # - right_after: () is right after the module name:
+      #
+      #   > import Vector.Instances ()
+      #
+      # Default: inherit
+      empty_list_align: inherit
+
+      # List padding determines indentation of import list on lines after import.
+      # This option affects 'long_list_align'.
+      #
+      # - <integer>: constant value
+      #
+      # - module_name: align under start of module name.
+      #   Useful for 'file' and 'group' align settings.
+      #
+      # Default: 4
+      list_padding: 2
+
+      # Separate lists option affects formatting of import list for type
+      # or class. The only difference is single space between type and list
+      # of constructors, selectors and class functions.
+      #
+      # - true: There is single space between Foldable type and list of it's
+      #   functions.
+      #
+      #   > import Data.Foldable (Foldable (fold, foldl, foldMap))
+      #
+      # - false: There is no space between Foldable type and list of it's
+      #   functions.
+      #
+      #   > import Data.Foldable (Foldable(fold, foldl, foldMap))
+      #
+      # Default: true
+      separate_lists: false
+
+      # Space surround option affects formatting of import lists on a single
+      # line. The only difference is single space after the initial
+      # parenthesis and a single space before the terminal parenthesis.
+      #
+      # - true: There is single space associated with the enclosing
+      #   parenthesis.
+      #
+      #   > import Data.Foo ( foo )
+      #
+      # - false: There is no space associated with the enclosing parenthesis
+      #
+      #   > import Data.Foo (foo)
+      #
+      # Default: false
+      space_surround: false
+
+      # Enabling this argument will use the new GHC lib parse to format imports.
+      #
+      # This currently assumes a few things, it will assume that you want post
+      # qualified imports. It is also not as feature complete as the old
+      # imports formatting.
+      #
+      # It does not remove redundant lines or merge lines. As such, the full
+      # feature scope is still pending.
+      #
+      # It _is_ however, a fine alternative if you are using features that are
+      # not parseable by haskell src extensions and you're comfortable with the
+      # presets.
+      #
+      # Default: false
+      ghc_lib_parser: false
+
+      # Post qualify option moves any qualifies found in import declarations
+      # to the end of the declaration. This also adjust padding for any
+      # unqualified import declarations.
+      #
+      # - true: Qualified as <module name> is moved to the end of the
+      #   declaration.
+      #
+      #   > import Data.Bar
+      #   > import Data.Foo qualified as F
+      #
+      # - false: Qualified remains in the default location and unqualified
+      #   imports are padded to align with qualified imports.
+      #
+      #   > import           Data.Bar
+      #   > import qualified Data.Foo as F
+      #
+      # Default: false
+      post_qualify: true
+
+      # A list of rules specifying how to group modules and how to
+      # order the groups.
+      #
+      # Each rule has a match field; the rule only applies to module
+      # names matched by this pattern. Patterns are POSIX extended
+      # regular expressions; see the documentation of Text.Regex.TDFA
+      # for details:
+      # https://hackage.haskell.org/package/regex-tdfa-1.3.1.2/docs/Text-Regex-TDFA.html
+      #
+      # Rules are processed in order, so only the *first* rule that
+      # matches a specific module will apply. Any module names that do
+      # not match a single rule will be put into a single group at the
+      # end of the import block.
+      #
+      # Example: group MyApp modules first, with everything else in
+      # one group at the end.
+      #
+      #  group_rules:
+      #    - match: "^MyApp\\>"
+      #
+      #  > import MyApp
+      #  > import MyApp.Foo
+      #  >
+      #  > import Control.Monad
+      #  > import MyApps
+      #  > import Test.MyApp
+      #
+      # A rule can also optionally have a sub_group pattern. Imports
+      # that match the rule will be broken up into further groups by
+      # the part of the module name matched by the sub_group pattern.
+      #
+      # Example: group MyApp modules first, then everything else
+      # sub-grouped by the first part of the module name.
+      #
+      #  group_rules:
+      #    - match: "^MyApp\\>"
+      #    - match: "."
+      #      sub_group: "^[^.]+"
+      #
+      #  > import MyApp
+      #  > import MyApp.Foo
+      #  >
+      #  > import Control.Applicative
+      #  > import Control.Monad
+      #  >
+      #  > import Data.Map
+      #
+      # A pattern only needs to match part of the module name, which
+      # could be in the middle. You can use ^pattern to anchor to the
+      # beginning of the module name, pattern$ to anchor to the end
+      # and ^pattern$ to force a full match. Example:
+      #
+      #  - "Test\\." would match "Test.Foo" and "Foo.Test.Lib"
+      #  - "^Test\\." would match "Test.Foo" but not "Foo.Test.Lib"
+      #  - "\\.Test$" would match "Foo.Test" but not "Foo.Test.Lib"
+      #  - "^Test$" would *only* match "Test"
+      #
+      # You can use \\< and \\> to anchor against the beginning and
+      # end of words, respectively. For example:
+      #
+      #  - "^Test\\." would match "Test.Foo" but not "Test" or "Tests"
+      #  - "^Test\\>" would match "Test.Foo" and "Test", but not
+      #    "Tests"
+      #
+      # The default is a single rule that matches everything and
+      # sub-groups based on the first component of the module name.
+      #
+      # Default: [{ "match" : ".*", "sub_group": "^[^.]+" }]
+#      group_rules:
+#        - match: ".*"
+#          sub_group: "^[^.]+"
+#        - match: "^Data.Array\\>"
+#          sub_group: "^[^.]+"
+#        - match: "^HordeAd\\>"
+
+  # Language pragmas
+  - language_pragmas:
+      # We can generate different styles of language pragma lists.
+      #
+      # - vertical: Vertical-spaced language pragmas, one per line.
+      #
+      # - compact: A more compact style.
+      #
+      # - compact_line: Similar to compact, but wrap each line with
+      #   `{-#LANGUAGE #-}'.
+      #
+      # Default: vertical.
+#      style: compact
+
+      # Align affects alignment of closing pragma brackets.
+      #
+      # - true: Brackets are aligned in same column.
+      #
+      # - false: Brackets are not aligned together. There is only one space
+      #   between actual import and closing bracket.
+      #
+      # Default: true
+      align: false
+
+      # stylish-haskell can detect redundancy of some language pragmas. If this
+      # is set to true, it will remove those redundant pragmas. Default: true.
+      remove_redundant: true
+
+      # Language prefix to be used for pragma declaration, this allows you to
+      # use other options non case-sensitive like "language" or "Language".
+      # If a non correct String is provided, it will default to: LANGUAGE.
+      language_prefix: LANGUAGE
+
+  # Replace tabs by spaces. This is disabled by default.
+  # - tabs:
+  #     # Number of spaces to use for each tab. Default: 8, as specified by the
+  #     # Haskell report.
+  #     spaces: 8
+
+  # Remove trailing whitespace
+  - trailing_whitespace: {}
+
+  # Squash multiple spaces between the left and right hand sides of some
+  # elements into single spaces. Basically, this undoes the effect of
+  # simple_align but is a bit less conservative.
+  # - squash: {}
+
+# A common setting is the number of columns (parts of) code will be wrapped
+# to. Different steps take this into account.
+#
+# Set this to null to disable all line wrapping.
+#
+# Default: 80.
+columns: 200
+
+# By default, line endings are converted according to the OS. You can override
+# preferred format here.
+#
+# - native: Native newline format. CRLF on Windows, LF on other OSes.
+#
+# - lf: Convert to LF ("\n").
+#
+# - crlf: Convert to CRLF ("\r\n").
+#
+# Default: native.
+newline: native
+
+# Sometimes, language extensions are specified in a cabal file or from the
+# command line instead of using language pragmas in the file. stylish-haskell
+# needs to be aware of these, so it can parse the file correctly.
+#
+# No language extensions are enabled by default.
+#language_extensions:
+#  - NoStarIsType
+  # - TemplateHaskell
+  # - QuasiQuotes
+
+# Attempt to find the cabal file in ancestors of the current directory, and
+# parse options (currently only language extensions) from that.
+#
+# Default: true
+cabal: true
diff --git a/bench/Main.hs b/bench/Main.hs
index 5901d8b..276a38a 100644
--- a/bench/Main.hs
+++ b/bench/Main.hs
@@ -17,7 +17,7 @@ import Text.Show (showListWith)
 
 import Data.Array.Mixed.XArray (XArray(..))
 import Data.Array.Nested
-import Data.Array.Nested.Internal.Mixed (Mixed (M_Primitive), mliftPrim, mliftPrim2, toPrimitive)
+import Data.Array.Nested.Internal.Mixed (Mixed(M_Primitive), mliftPrim, mliftPrim2, toPrimitive)
 import Data.Array.Nested.Internal.Ranked (liftRanked1, liftRanked2)
 import Data.Array.Strided.Arith.Internal qualified as Arith
 
diff --git a/src/Data/Array/Mixed/Lemmas.hs b/src/Data/Array/Mixed/Lemmas.hs
index ca82573..7b3365b 100644
--- a/src/Data/Array/Mixed/Lemmas.hs
+++ b/src/Data/Array/Mixed/Lemmas.hs
@@ -13,8 +13,8 @@ import Data.Type.Equality
 import GHC.TypeLits
 
 import Data.Array.Mixed.Permutation
-import Data.Array.Nested.Mixed.Shape
 import Data.Array.Mixed.Types
+import Data.Array.Nested.Mixed.Shape
 
 
 -- * Reasoning helpers
diff --git a/src/Data/Array/Mixed/Permutation.hs b/src/Data/Array/Mixed/Permutation.hs
index 22672cb..ef0afe3 100644
--- a/src/Data/Array/Mixed/Permutation.hs
+++ b/src/Data/Array/Mixed/Permutation.hs
@@ -29,8 +29,8 @@ import GHC.TypeError
 import GHC.TypeLits
 import GHC.TypeNats qualified as TN
 
-import Data.Array.Nested.Mixed.Shape
 import Data.Array.Mixed.Types
+import Data.Array.Nested.Mixed.Shape
 
 
 -- * Permutations
diff --git a/src/Data/Array/Mixed/XArray.hs b/src/Data/Array/Mixed/XArray.hs
index 3e7a498..502d5d9 100644
--- a/src/Data/Array/Mixed/XArray.hs
+++ b/src/Data/Array/Mixed/XArray.hs
@@ -34,8 +34,8 @@ import GHC.TypeLits
 import Data.Array.Mixed.Internal.Arith
 import Data.Array.Mixed.Lemmas
 import Data.Array.Mixed.Permutation
-import Data.Array.Nested.Mixed.Shape
 import Data.Array.Mixed.Types
+import Data.Array.Nested.Mixed.Shape
 
 
 type XArray :: [Maybe Nat] -> Type -> Type
diff --git a/src/Data/Array/Nested/Internal/Convert.hs b/src/Data/Array/Nested/Internal/Convert.hs
index 5d6cee4..4e0f17d 100644
--- a/src/Data/Array/Nested/Internal/Convert.hs
+++ b/src/Data/Array/Nested/Internal/Convert.hs
@@ -12,13 +12,13 @@ import Data.Proxy
 import Data.Type.Equality
 
 import Data.Array.Mixed.Lemmas
-import Data.Array.Nested.Mixed.Shape
 import Data.Array.Mixed.Types
 import Data.Array.Nested.Internal.Lemmas
 import Data.Array.Nested.Internal.Mixed
 import Data.Array.Nested.Internal.Ranked
-import Data.Array.Nested.Shaped.Shape
 import Data.Array.Nested.Internal.Shaped
+import Data.Array.Nested.Mixed.Shape
+import Data.Array.Nested.Shaped.Shape
 
 
 stoRanked :: Elt a => Shaped sh a -> Ranked (Rank sh) a
diff --git a/src/Data/Array/Nested/Internal/Lemmas.hs b/src/Data/Array/Nested/Internal/Lemmas.hs
index b8baf96..f4bad70 100644
--- a/src/Data/Array/Nested/Internal/Lemmas.hs
+++ b/src/Data/Array/Nested/Internal/Lemmas.hs
@@ -11,8 +11,8 @@ import GHC.TypeLits
 
 import Data.Array.Mixed.Lemmas
 import Data.Array.Mixed.Permutation
-import Data.Array.Nested.Mixed.Shape
 import Data.Array.Mixed.Types
+import Data.Array.Nested.Mixed.Shape
 import Data.Array.Nested.Shaped.Shape
 
 
diff --git a/src/Data/Array/Nested/Internal/Mixed.hs b/src/Data/Array/Nested/Internal/Mixed.hs
index b76aa50..a979d6c 100644
--- a/src/Data/Array/Nested/Internal/Mixed.hs
+++ b/src/Data/Array/Nested/Internal/Mixed.hs
@@ -45,10 +45,10 @@ import Unsafe.Coerce (unsafeCoerce)
 import Data.Array.Mixed.Internal.Arith
 import Data.Array.Mixed.Lemmas
 import Data.Array.Mixed.Permutation
-import Data.Array.Nested.Mixed.Shape
 import Data.Array.Mixed.Types
 import Data.Array.Mixed.XArray (XArray(..))
 import Data.Array.Mixed.XArray qualified as X
+import Data.Array.Nested.Mixed.Shape
 import Data.Bag
 
 
diff --git a/src/Data/Array/Nested/Internal/Shaped.hs b/src/Data/Array/Nested/Internal/Shaped.hs
index 86dcee2..1415815 100644
--- a/src/Data/Array/Nested/Internal/Shaped.hs
+++ b/src/Data/Array/Nested/Internal/Shaped.hs
@@ -40,12 +40,12 @@ import GHC.TypeLits
 
 import Data.Array.Mixed.Lemmas
 import Data.Array.Mixed.Permutation
-import Data.Array.Nested.Mixed.Shape
 import Data.Array.Mixed.Types
 import Data.Array.Mixed.XArray (XArray)
 import Data.Array.Mixed.XArray qualified as X
 import Data.Array.Nested.Internal.Lemmas
 import Data.Array.Nested.Internal.Mixed
+import Data.Array.Nested.Mixed.Shape
 import Data.Array.Nested.Shaped.Shape
 import Data.Array.Strided.Arith