145 lines
3.3 KiB
VimL
145 lines
3.3 KiB
VimL
" indentation for idris (idris-lang.org)
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"
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" Based on haskell indentation by motemen <motemen@gmail.com>
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"
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" author: raichoo (raichoo@googlemail.com)
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"
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" Modify g:idris_indent_if and g:idris_indent_case to
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" change indentation for `if'(default 3) and `case'(default 5).
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" Example (in .vimrc):
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" > let g:idris_indent_if = 2
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if exists('b:did_indent')
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finish
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endif
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let b:did_indent = 1
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if !exists('g:idris_indent_if')
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" if bool
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" >>>then ...
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" >>>else ...
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let g:idris_indent_if = 3
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endif
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if !exists('g:idris_indent_case')
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" case xs of
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" >>>>>[] => ...
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" >>>>>(y::ys) => ...
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let g:idris_indent_case = 5
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endif
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if !exists('g:idris_indent_let')
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" let x : Nat = O in
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" >>>>x
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let g:idris_indent_let = 4
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endif
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if !exists('g:idris_indent_rewrite')
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" rewrite prf in expr
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" >>>>>>>>x
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let g:idris_indent_rewrite = 8
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endif
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if !exists('g:idris_indent_where')
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" where f : Nat -> Nat
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" >>>>>>f x = x
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let g:idris_indent_where = 6
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endif
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if !exists('g:idris_indent_do')
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" do x <- a
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" >>>y <- b
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let g:idris_indent_do = 3
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endif
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setlocal indentexpr=GetIdrisIndent()
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setlocal indentkeys=!^F,o,O
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function! GetIdrisIndent()
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let prevline = getline(v:lnum - 1)
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if prevline =~ '\s\+(\s*.\+\s\+:\s\+.\+\s*)\s\+->\s*$'
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return match(prevline, '(')
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elseif prevline =~ '\s\+{\s*.\+\s\+:\s\+.\+\s*}\s\+->\s*$'
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return match(prevline, '{')
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endif
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if prevline =~ '[!#$%&*+./<>?@\\^|~-]\s*$'
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let s = match(prevline, '[:=]')
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if s > 0
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return s + 2
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else
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return match(prevline, '\S')
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endif
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endif
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if prevline =~ '[{([][^})\]]\+$'
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return match(prevline, '[{([]')
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endif
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if prevline =~ '\<let\>\s\+.\+\<in\>\s*$'
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return match(prevline, '\<let\>') + g:idris_indent_let
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endif
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if prevline =~ '\<rewrite\>\s\+.\+\<in\>\s*$'
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return match(prevline, '\<rewrite\>') + g:idris_indent_rewrite
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endif
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if prevline !~ '\<else\>'
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let s = match(prevline, '\<if\>.*\&.*\zs\<then\>')
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if s > 0
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return s
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endif
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let s = match(prevline, '\<if\>')
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if s > 0
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return s + g:idris_indent_if
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endif
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endif
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if prevline =~ '\(\<where\>\|\<do\>\|=\|[{([]\)\s*$'
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return match(prevline, '\S') + &shiftwidth
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endif
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if prevline =~ '\<where\>\s\+\S\+.*$'
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return match(prevline, '\<where\>') + g:idris_indent_where
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endif
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if prevline =~ '\<do\>\s\+\S\+.*$'
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return match(prevline, '\<do\>') + g:idris_indent_do
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endif
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if prevline =~ '^\s*\<\(co\)\?data\>\s\+[^=]\+\s\+=\s\+\S\+.*$'
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return match(prevline, '=')
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endif
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if prevline =~ '\<with\>\s\+([^)]*)\s*$'
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return match(prevline, '\S') + &shiftwidth
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endif
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if prevline =~ '\<case\>\s\+.\+\<of\>\s*$'
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return match(prevline, '\<case\>') + g:idris_indent_case
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endif
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if prevline =~ '^\s*\(\<namespace\>\|\<\(co\)\?data\>\)\s\+\S\+\s*$'
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return match(prevline, '\(\<namespace\>\|\<\(co\)\?data\>\)') + &shiftwidth
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endif
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if prevline =~ '^\s*\(\<using\>\|\<parameters\>\)\s*([^(]*)\s*$'
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return match(prevline, '\(\<using\>\|\<parameters\>\)') + &shiftwidth
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endif
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if prevline =~ '^\s*\<mutual\>\s*$'
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return match(prevline, '\<mutual\>') + &shiftwidth
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endif
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let line = getline(v:lnum)
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if (line =~ '^\s*}\s*' && prevline !~ '^\s*;')
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return match(prevline, '\S') - &shiftwidth
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endif
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return match(prevline, '\S')
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endfunction
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