.stylish-haskell.yaml

# Stylish-haskell configuration file.

# Principles:
#
# 1. Amount of indent should not be dependent on the length of the previous line
# 2. Imports lists should be compact
# 3. All linting rules that delete comments should be disabled
# 4. No inline indenting, for example indent of ->, =, <-, as
# 5. Redunant imports and pragmas should be removed
# 6. Consistent syntax
# 7. No trailing whitespaces
# 8. Slightly generous screen with assumed
# 9. All Haskell files in the project are subject to code formatting style

steps:
  # Principle 4
  - simple_align:
      cases: false
      top_level_patterns: false
      # Principle 3
      records: false

  # Import cleanup
  - imports:
      align: global

      # Principle 1,2
      list_align: with_module_name

      # Principle 4
      pad_module_names: false

      # Principle 2
      long_list_align: inline

      empty_list_align: inherit

      list_padding: 2

      separate_lists: true

      space_surround: false

  - language_pragmas:
      style: vertical

      align: false

      # Principle 5
      remove_redundant: true

      # Principle 6
      language_prefix: LANGUAGE

  # Principle 7
  - trailing_whitespace: {}

# Principle 8
columns: 100

newline: native

# Principle 9
#
# These syntax-affecting language extensions are enabled so that
# stylish-haskell wouldn't fail with parsing errors when processing files
# in projects that have those extensions enabled in the .cabal file
# rather than locally.
#
# In particular language extensions with British and American spellings
# that we use should be included here until stylish-haskell supports
# the British spelling.
language_extensions:
  - BangPatterns
  - ConstraintKinds
  - DataKinds
  - DefaultSignatures
  - DeriveDataTypeable
  - DeriveGeneric
  - ExistentialQuantification
  - FlexibleContexts
  - FlexibleInstances
  - FunctionalDependencies
  - GADTs
  - GeneralizedNewtypeDeriving
  - LambdaCase
  - MultiParamTypeClasses
  - MultiWayIf
  - OverloadedStrings
  - PolyKinds
  - ScopedTypeVariables
  - StandaloneDeriving
  - TemplateHaskell
  - TupleSections
  - TypeApplications
  - TypeFamilies
  - ExplicitNamespaces

cabal: true