fourmolu.yaml

# How many spaces to use as an indent
# - any non-negative integer 
indentation: 2

# Where to place arrows in type signatures
# - trailing
# - leading
function-arrows: leading

# Where to place commas in lists, tuples, etc.
# - trailing
# - leading
comma-style: leading

# How to format multiline import/export lists (diff-friendly lists have trailing
# commas but keep the opening parenthesis on the same line as import)
# - leading
# - trailing
# - diff-friendly
import-export-style: leading

# Use an extra level of indentation vs only half-indent the where keyword
# -	true
# - false
indent-wheres: false

# rec {x = 1} vs rec{x = 1}
# -	true
# - false
record-brace-space: false

# Number of newlines between top-level declarations
# - any non-negative integer 
newlines-between-decls: 2

# Use -- |, {- |, or {-| for multiline haddocks (single-line haddocks always use --)
# - single-line
# - multi-line
# - multi-line-compact
haddock-style: single-line

# How to style let blocks (auto uses newline if there's a newline in the input and 
# inline otherwise, and mixed uses inline only when the let has exactly one binding)
# - inline
# - newline
# - auto
# - mixed
let-style: auto

# How to align the in keyword with respect to let
# - left-align
# - right-align
in-style: right-align

# Be less aggressive in reformatting input, e.g. keep empty lines in import list
# -	true
# - false
respectful: true

# The auto option will keep parentheses if they already exist, but won't add parentheses if not. 
# - auto
# - always
# - never
single-constraint-parens: never