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
|
" Vim indent file
" Language: SML
" Maintainer: Saikat Guha <sg266@cornell.edu>
" Hubert Chao <hc85@cornell.edu>
" Original OCaml Version:
" Jean-Francois Yuen <jfyuen@ifrance.com>
" Mike Leary <leary@nwlink.com>
" Markus Mottl <markus@oefai.at>
" OCaml URL: http://www.oefai.at/~markus/vim/indent/ocaml.vim
" Last Change: 2003 Jan 04 - Adapted to SML
" 2002 Nov 06 - Some fixes (JY)
" 2002 Oct 28 - Fixed bug with indentation of ']' (MM)
" 2002 Oct 22 - Major rewrite (JY)
" 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=GetSMLIndent()
setlocal indentkeys+=0=and,0=else,0=end,0=handle,0=if,0=in,0=let,0=then,0=val,0=fun,0=\|,0=*),0)
setlocal nolisp
setlocal nosmartindent
setlocal textwidth=80
setlocal shiftwidth=2
" Comment formatting
if (has("comments"))
set comments=sr:(*,mb:*,ex:*)
set fo=cqort
endif
" Only define the function once.
"if exists("*GetSMLIndent")
"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 = '\<\%(let\|sig\|struct\)\>'
let s:obj = '^\s*\(constraint\|inherit\|initializer\|method\|val\)\>\|\<\(object\|object\s*(.*)\)\s*$'
let s:type = '^\s*\%(let\|type\)\>.*='
let s:val = '^\s*\(val\|external\)\>.*:'
" Skipping pattern, for comments
function! s:SkipPattern(lnum, pat)
let def = prevnonblank(a:lnum - 1)
while def > 0 && getline(def) =~ a:pat
let def = prevnonblank(def - 1)
endwhile
return def
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:SkipPattern(llet, '^\s*(\*.*\*)\s*$')
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"'))
let lno = searchpair(a:pstart, a:pmid, a:pend, 'bW', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"')
if lno == -1
return indent(lno)
else
return col(".") - 1
endif
endfunction
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"'))
let lno = searchpair(a:pstart, a:pmid, a:pend, 'bW', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"')
let moduleLine = getline(lno)
if lno == -1 || moduleLine =~ '^\s*\(fun\|structure\|signature\)\>'
return indent(lno)
else
return col(".") - 1
endif
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*$" || getline(prevnonblank(".") - 1) =~ "^\\s*let\\>.*=\\s*$\\|" . s:beflet'))
"endfunction
function! GetSMLIndent()
" Find a non-blank line above the current line.
let lnum = prevnonblank(v:lnum - 1)
" At the start of the file use zero indent.
if lnum == 0
return 0
endif
let ind = indent(lnum)
let lline = getline(lnum)
" Return double 'shiftwidth' after lines matching:
if lline =~ '^\s*|.*=>\s*$'
return ind + &sw + &sw
elseif lline =~ '^\s*val\>.*=\s*$'
return ind + &sw
endif
let line = getline(v:lnum)
" Indent lines starting with 'end' to matching module
if line =~ '^\s*end\>'
return s:FindLet(s:module, '', '\<end\>')
" Match 'else' with 'if'
elseif line =~ '^\s*else\>'
if lline !~ '^\s*\(if\|else\|then\)\>'
return s:FindPair('\<if\>', '', '\<then\>')
else
return ind
endif
" Match 'then' with 'if'
elseif line =~ '^\s*then\>'
if lline !~ '^\s*\(if\|else\|then\)\>'
return s:FindPair('\<if\>', '', '\<then\>')
else
return ind
endif
" Indent if current line begins with ']'
elseif line =~ '^\s*\]'
return s:FindPair('\[','','\]')
" Indent current line starting with 'in' to last matching 'let'
elseif line =~ '^\s*in\>'
let ind = s:FindLet('\<let\>','','\<in\>')
" Indent from last matching module if line matches:
elseif line =~ '^\s*\(fun\|val\|open\|structure\|and\|datatype\|type\|exception\)\>'
cursor(lnum,1)
let lastModule = indent(searchpair(s:module, '', '\<end\>', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"'))
if lastModule == -1
return 0
else
return lastModule + &sw
endif
" Indent lines starting with '|' from matching 'case', 'handle'
elseif line =~ '^\s*|'
" cursor(lnum,1)
let lastSwitch = search('\<\(case\|handle\|fun\|datatype\)\>','bW')
let switchLine = getline(lastSwitch)
let switchLineIndent = indent(lastSwitch)
if lline =~ '^\s*|'
return ind
endif
if switchLine =~ '\<case\>'
return col(".") + 2
elseif switchLine =~ '\<handle\>'
return switchLineIndent + &sw
elseif switchLine =~ '\<datatype\>'
call search('=')
return col(".") - 1
else
return switchLineIndent + 2
endif
" Indent if last line ends with 'sig', 'struct', 'let', 'then', 'else',
" 'in'
elseif lline =~ '\<\(sig\|struct\|let\|in\|then\|else\)\s*$'
let ind = ind + &sw
" Indent if last line ends with 'of', align from 'case'
elseif lline =~ '\<\(of\)\s*$'
call search('\<case\>',"bW")
let ind = col(".")+4
" Indent if current line starts with 'of'
elseif line =~ '^\s*of\>'
call search('\<case\>',"bW")
let ind = col(".")+1
" Indent if last line starts with 'fun', 'case', 'fn'
elseif lline =~ '^\s*\(fun\|fn\|case\)\>'
let ind = ind + &sw
endif
" Don't indent 'let' if last line started with 'fun', 'fn'
if line =~ '^\s*let\>'
if lline =~ '^\s*\(fun\|fn\)'
let ind = ind - &sw
endif
endif
return ind
endfunction
" vim:sw=2
|
