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" Vim indent file
" Language: Idris 2
" Maintainer: Idris Hackers (https://github.com/edwinb/idris2-vim), Serhii Khoma <srghma@gmail.com>
" Author: raichoo <raichoo@googlemail.com>
" Last Change: 2024 Nov 05
" License: Vim (see :h license)
" Repository: https://github.com/ShinKage/idris2-nvim
"
" indentation for idris (idris-lang.org)
"
" Based on haskell indentation by motemen <motemen@gmail.com>
"
" Indentation configuration variables:
"
" g:idris2_indent_if (default: 3)
" Controls indentation after 'if' statements
" Example:
" if condition
" >>>then expr
" >>>else expr
"
" g:idris2_indent_case (default: 5)
" Controls indentation of case expressions
" Example:
" case x of
" >>>>>Left y => ...
" >>>>>Right z => ...
"
" g:idris2_indent_let (default: 4)
" Controls indentation after 'let' bindings
" Example:
" let x = expr in
" >>>>body
"
" g:idris2_indent_rewrite (default: 8)
" Controls indentation after 'rewrite' expressions
" Example:
" rewrite proof in
" >>>>>>>>expr
"
" g:idris2_indent_where (default: 6)
" Controls indentation of 'where' blocks
" Example:
" function args
" >>>>>>where helper = expr
"
" g:idris2_indent_do (default: 3)
" Controls indentation in 'do' blocks
" Example:
" do x <- action
" >>>y <- action
"
" Example configuration in .vimrc:
" let g:idris2_indent_if = 2
if exists('b:did_indent')
finish
endif
setlocal indentexpr=GetIdrisIndent()
setlocal indentkeys=!^F,o,O,}
let b:did_indent = 1
let b:undo_indent = "setlocal indentexpr< indentkeys<"
" we want to use line continuations (\) BEGINNING
let s:cpo_save = &cpo
set cpo&vim
" Define defaults for indent configuration
let s:indent_defaults = {
\ 'idris2_indent_if': 3,
\ 'idris2_indent_case': 5,
\ 'idris2_indent_let': 4,
\ 'idris2_indent_rewrite': 8,
\ 'idris2_indent_where': 6,
\ 'idris2_indent_do': 3
\ }
" we want to use line continuations (\) END
let &cpo = s:cpo_save
unlet s:cpo_save
" Set up indent settings with user overrides
for [key, default] in items(s:indent_defaults)
let varname = 'g:' . key
if !exists(varname)
execute 'let' varname '=' default
endif
endfor
if exists("*GetIdrisIndent")
finish
endif
function! GetIdrisIndent()
let prevline = getline(v:lnum - 1)
if prevline =~ '\s\+(\s*.\+\s\+:\s\+.\+\s*)\s\+->\s*$'
return match(prevline, '(')
elseif prevline =~ '\s\+{\s*.\+\s\+:\s\+.\+\s*}\s\+->\s*$'
return match(prevline, '{')
endif
if prevline =~ '[!#$%&*+./<>?@\\^|~-]\s*$'
let s = match(prevline, '[:=]')
if s > 0
return s + 2
else
return match(prevline, '\S')
endif
endif
if prevline =~ '[{([][^})\]]\+$'
return match(prevline, '[{([]')
endif
if prevline =~ '\<let\>\s\+.\+\<in\>\s*$'
return match(prevline, '\<let\>') + g:idris2_indent_let
endif
if prevline =~ '\<rewrite\>\s\+.\+\<in\>\s*$'
return match(prevline, '\<rewrite\>') + g:idris2_indent_rewrite
endif
if prevline !~ '\<else\>'
let s = match(prevline, '\<if\>.*\&.*\zs\<then\>')
if s > 0
return s
endif
let s = match(prevline, '\<if\>')
if s > 0
return s + g:idris2_indent_if
endif
endif
if prevline =~ '\(\<where\>\|\<do\>\|=\|[{([]\)\s*$'
return match(prevline, '\S') + &shiftwidth
endif
if prevline =~ '\<where\>\s\+\S\+.*$'
return match(prevline, '\<where\>') + g:idris2_indent_where
endif
if prevline =~ '\<do\>\s\+\S\+.*$'
return match(prevline, '\<do\>') + g:idris2_indent_do
endif
if prevline =~ '^\s*\<\(co\)\?data\>\s\+[^=]\+\s\+=\s\+\S\+.*$'
return match(prevline, '=')
endif
if prevline =~ '\<with\>\s\+([^)]*)\s*$'
return match(prevline, '\S') + &shiftwidth
endif
if prevline =~ '\<case\>\s\+.\+\<of\>\s*$'
return match(prevline, '\<case\>') + g:idris2_indent_case
endif
if prevline =~ '^\s*\(\<namespace\>\|\<\(co\)\?data\>\)\s\+\S\+\s*$'
return match(prevline, '\(\<namespace\>\|\<\(co\)\?data\>\)') + &shiftwidth
endif
if prevline =~ '^\s*\(\<using\>\|\<parameters\>\)\s*([^(]*)\s*$'
return match(prevline, '\(\<using\>\|\<parameters\>\)') + &shiftwidth
endif
if prevline =~ '^\s*\<mutual\>\s*$'
return match(prevline, '\<mutual\>') + &shiftwidth
endif
let line = getline(v:lnum)
if (line =~ '^\s*}\s*' && prevline !~ '^\s*;')
return match(prevline, '\S') - &shiftwidth
endif
return match(prevline, '\S')
endfunction
" vim:et:sw=2:sts=2
|
