1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
|
" Vim indent file
" Language: OCaml
" Maintainers: Jean-Francois Yuen <jfyuen@happycoders.org>
" Mike Leary <leary@nwlink.com>
" Markus Mottl <markus.mottl@gmail.com>
" URL: https://github.com/ocaml/vim-ocaml
" Last Change: 2023 Aug 28 - Add undo_indent (Vim Project)
" 2017 Jun 13
" 2005 Jun 25 - Fixed multiple bugs due to 'else\nreturn ind' working
" 2005 May 09 - Added an option to not indent OCaml-indents specially (MM)
" 2013 June - commented textwidth (Marc Weber)
"
" Marc Weber's comment: This file may contain a lot of (very custom) stuff
" which eventually should be moved somewhere else ..
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal expandtab
setlocal indentexpr=GetOCamlIndent()
setlocal indentkeys+=0=and,0=class,0=constraint,0=done,0=else,0=end,0=exception,0=external,0=if,0=in,0=include,0=inherit,0=initializer,0=let,0=method,0=open,0=then,0=type,0=val,0=with,0;;,0>\],0\|\],0>},0\|,0},0\],0)
setlocal nolisp
setlocal nosmartindent
let b:undo_indent = "setl et< inde< indk< lisp< si<"
" At least Marc Weber and Markus Mottl do not like this:
" setlocal textwidth=80
" Comment formatting
if !exists("no_ocaml_comments")
if (has("comments"))
setlocal comments=sr:(*\ ,mb:\ ,ex:*)
setlocal comments^=sr:(**,mb:\ \ ,ex:*)
setlocal fo=cqort
endif
endif
" Only define the function once.
if exists("*GetOCamlIndent")
finish
endif
" Define some patterns:
let s:beflet = '^\s*\(initializer\|method\|try\)\|\(\<\(begin\|do\|else\|in\|then\|try\)\|->\|<-\|=\|;\|(\)\s*$'
let s:letpat = '^\s*\(let\|type\|module\|class\|open\|exception\|val\|include\|external\)\>'
let s:letlim = '\(\<\(sig\|struct\)\|;;\)\s*$'
let s:lim = '^\s*\(exception\|external\|include\|let\|module\|open\|type\|val\)\>'
let s:module = '\<\%(begin\|sig\|struct\|object\)\>'
let s:obj = '^\s*\(constraint\|inherit\|initializer\|method\|val\)\>\|\<\(object\|object\s*(.*)\)\s*$'
let s:type = '^\s*\%(class\|let\|type\)\>.*='
" Skipping pattern, for comments
function! s:GetLineWithoutFullComment(lnum)
let lnum = prevnonblank(a:lnum - 1)
let lline = substitute(getline(lnum), '(\*.*\*)\s*$', '', '')
while lline =~ '^\s*$' && lnum > 0
let lnum = prevnonblank(lnum - 1)
let lline = substitute(getline(lnum), '(\*.*\*)\s*$', '', '')
endwhile
return lnum
endfunction
" Indent for ';;' to match multiple 'let'
function! s:GetInd(lnum, pat, lim)
let llet = search(a:pat, 'bW')
let old = indent(a:lnum)
while llet > 0
let old = indent(llet)
let nb = s:GetLineWithoutFullComment(llet)
if getline(nb) =~ a:lim
return old
endif
let llet = search(a:pat, 'bW')
endwhile
return old
endfunction
" Indent pairs
function! s:FindPair(pstart, pmid, pend)
call search(a:pend, 'bW')
return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"'))
endfunction
" Indent 'let'
function! s:FindLet(pstart, pmid, pend)
call search(a:pend, 'bW')
return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment" || getline(".") =~ "^\\s*let\\>.*=.*\\<in\\s*$" || getline(prevnonblank(".") - 1) =~ s:beflet'))
endfunction
function! GetOCamlIndent()
" Find a non-commented line above the current line.
let lnum = s:GetLineWithoutFullComment(v:lnum)
" At the start of the file use zero indent.
if lnum == 0
return 0
endif
let ind = indent(lnum)
let lline = substitute(getline(lnum), '(\*.*\*)\s*$', '', '')
" Return double 'shiftwidth' after lines matching:
if lline =~ '^\s*|.*->\s*$'
return ind + 2 * shiftwidth()
endif
let line = getline(v:lnum)
" Indent if current line begins with 'end':
if line =~ '^\s*end\>'
return s:FindPair(s:module, '','\<end\>')
" Indent if current line begins with 'done' for 'do':
elseif line =~ '^\s*done\>'
return s:FindPair('\<do\>', '','\<done\>')
" Indent if current line begins with '}' or '>}':
elseif line =~ '^\s*\(\|>\)}'
return s:FindPair('{', '','}')
" Indent if current line begins with ']', '|]' or '>]':
elseif line =~ '^\s*\(\||\|>\)\]'
return s:FindPair('\[', '','\]')
" Indent if current line begins with ')':
elseif line =~ '^\s*)'
return s:FindPair('(', '',')')
" Indent if current line begins with 'let':
elseif line =~ '^\s*let\>'
if lline !~ s:lim . '\|' . s:letlim . '\|' . s:beflet
return s:FindLet(s:type, '','\<let\s*$')
endif
" Indent if current line begins with 'class' or 'type':
elseif line =~ '^\s*\(class\|type\)\>'
if lline !~ s:lim . '\|\<and\s*$\|' . s:letlim
return s:FindLet(s:type, '','\<\(class\|type\)\s*$')
endif
" Indent for pattern matching:
elseif line =~ '^\s*|'
if lline !~ '^\s*\(|[^\]]\|\(match\|type\|with\)\>\)\|\<\(function\|parser\|private\|with\)\s*$'
call search('|', 'bW')
return indent(searchpair('^\s*\(match\|type\)\>\|\<\(function\|parser\|private\|with\)\s*$', '', '^\s*|', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment" || getline(".") !~ "^\\s*|.*->"'))
endif
" Indent if current line begins with ';;':
elseif line =~ '^\s*;;'
if lline !~ ';;\s*$'
return s:GetInd(v:lnum, s:letpat, s:letlim)
endif
" Indent if current line begins with 'in':
elseif line =~ '^\s*in\>'
if lline !~ '^\s*\(let\|and\)\>'
return s:FindPair('\<let\>', '', '\<in\>')
endif
" Indent if current line begins with 'else':
elseif line =~ '^\s*else\>'
if lline !~ '^\s*\(if\|then\)\>'
return s:FindPair('\<if\>', '', '\<else\>')
endif
" Indent if current line begins with 'then':
elseif line =~ '^\s*then\>'
if lline !~ '^\s*\(if\|else\)\>'
return s:FindPair('\<if\>', '', '\<then\>')
endif
" Indent if current line begins with 'and':
elseif line =~ '^\s*and\>'
if lline !~ '^\s*\(and\|let\|type\)\>\|\<end\s*$'
return ind - shiftwidth()
endif
" Indent if current line begins with 'with':
elseif line =~ '^\s*with\>'
if lline !~ '^\s*\(match\|try\)\>'
return s:FindPair('\<\%(match\|try\)\>', '','\<with\>')
endif
" Indent if current line begins with 'exception', 'external', 'include' or
" 'open':
elseif line =~ '^\s*\(exception\|external\|include\|open\)\>'
if lline !~ s:lim . '\|' . s:letlim
call search(line)
return indent(search('^\s*\(\(exception\|external\|include\|open\|type\)\>\|val\>.*:\)', 'bW'))
endif
" Indent if current line begins with 'val':
elseif line =~ '^\s*val\>'
if lline !~ '^\s*\(exception\|external\|include\|open\)\>\|' . s:obj . '\|' . s:letlim
return indent(search('^\s*\(\(exception\|include\|initializer\|method\|open\|type\|val\)\>\|external\>.*:\)', 'bW'))
endif
" Indent if current line begins with 'constraint', 'inherit', 'initializer'
" or 'method':
elseif line =~ '^\s*\(constraint\|inherit\|initializer\|method\)\>'
if lline !~ s:obj
return indent(search('\<\(object\|object\s*(.*)\)\s*$', 'bW')) + shiftwidth()
endif
endif
" Add a 'shiftwidth' after lines ending with:
if lline =~ '\(:\|=\|->\|<-\|(\|\[\|{\|{<\|\[|\|\[<\|\<\(begin\|do\|else\|fun\|function\|functor\|if\|initializer\|object\|parser\|private\|sig\|struct\|then\|try\)\|\<object\s*(.*)\)\s*$'
let ind = ind + shiftwidth()
" Back to normal indent after lines ending with ';;':
elseif lline =~ ';;\s*$' && lline !~ '^\s*;;'
let ind = s:GetInd(v:lnum, s:letpat, s:letlim)
" Back to normal indent after lines ending with 'end':
elseif lline =~ '\<end\s*$'
let ind = s:FindPair(s:module, '','\<end\>')
" Back to normal indent after lines ending with 'in':
elseif lline =~ '\<in\s*$' && lline !~ '^\s*in\>'
let ind = s:FindPair('\<let\>', '', '\<in\>')
" Back to normal indent after lines ending with 'done':
elseif lline =~ '\<done\s*$'
let ind = s:FindPair('\<do\>', '','\<done\>')
" Back to normal indent after lines ending with '}' or '>}':
elseif lline =~ '\(\|>\)}\s*$'
let ind = s:FindPair('{', '','}')
" Back to normal indent after lines ending with ']', '|]' or '>]':
elseif lline =~ '\(\||\|>\)\]\s*$'
let ind = s:FindPair('\[', '','\]')
" Back to normal indent after comments:
elseif lline =~ '\*)\s*$'
call search('\*)', 'bW')
let ind = indent(searchpair('(\*', '', '\*)', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string"'))
" Back to normal indent after lines ending with ')':
elseif lline =~ ')\s*$'
let ind = s:FindPair('(', '',')')
" If this is a multiline comment then align '*':
elseif lline =~ '^\s*(\*' && line =~ '^\s*\*'
let ind = ind + 1
else
" Don't change indentation of this line
" for new lines (indent==0) use indentation of previous line
" This is for preventing removing indentation of these args:
" let f x =
" let y = x + 1 in
" Printf.printf
" "o" << here
" "oeuth" << don't touch indentation
let i = indent(v:lnum)
return i == 0 ? ind : i
endif
" Subtract a 'shiftwidth' after lines matching 'match ... with parser':
if lline =~ '\<match\>.*\<with\>\s*\<parser\s*$'
let ind = ind - shiftwidth()
endif
return ind
endfunction
" vim:sw=2
|
