|
6153
|
1 " Vim indent file
|
|
|
2 " Language: Go
|
|
|
3 " Maintainer: David Barnett (https://github.com/google/vim-ft-go)
|
|
|
4 " Last Change: 2014 Aug 16
|
|
|
5 "
|
|
|
6 " TODO:
|
|
|
7 " - function invocations split across lines
|
|
|
8 " - general line splits (line ends in an operator)
|
|
|
9
|
|
|
10 if exists('b:did_indent')
|
|
|
11 finish
|
|
|
12 endif
|
|
|
13 let b:did_indent = 1
|
|
|
14
|
|
|
15 " C indentation is too far off useful, mainly due to Go's := operator.
|
|
|
16 " Let's just define our own.
|
|
|
17 setlocal nolisp
|
|
|
18 setlocal autoindent
|
|
|
19 setlocal indentexpr=GoIndent(v:lnum)
|
|
|
20 setlocal indentkeys+=<:>,0=},0=)
|
|
|
21
|
|
|
22 if exists('*GoIndent')
|
|
|
23 finish
|
|
|
24 endif
|
|
|
25
|
|
|
26 " The shiftwidth() function is relatively new.
|
|
|
27 " Don't require it to exist.
|
|
|
28 if exists('*shiftwidth')
|
|
|
29 function s:sw() abort
|
|
|
30 return shiftwidth()
|
|
|
31 endfunction
|
|
|
32 else
|
|
|
33 function s:sw() abort
|
|
|
34 return &shiftwidth
|
|
|
35 endfunction
|
|
|
36 endif
|
|
|
37
|
|
|
38 function! GoIndent(lnum)
|
|
|
39 let l:prevlnum = prevnonblank(a:lnum-1)
|
|
|
40 if l:prevlnum == 0
|
|
|
41 " top of file
|
|
|
42 return 0
|
|
|
43 endif
|
|
|
44
|
|
|
45 " grab the previous and current line, stripping comments.
|
|
|
46 let l:prevl = substitute(getline(l:prevlnum), '//.*$', '', '')
|
|
|
47 let l:thisl = substitute(getline(a:lnum), '//.*$', '', '')
|
|
|
48 let l:previ = indent(l:prevlnum)
|
|
|
49
|
|
|
50 let l:ind = l:previ
|
|
|
51
|
|
|
52 if l:prevl =~ '[({]\s*$'
|
|
|
53 " previous line opened a block
|
|
|
54 let l:ind += s:sw()
|
|
|
55 endif
|
|
|
56 if l:prevl =~# '^\s*\(case .*\|default\):$'
|
|
|
57 " previous line is part of a switch statement
|
|
|
58 let l:ind += s:sw()
|
|
|
59 endif
|
|
|
60 " TODO: handle if the previous line is a label.
|
|
|
61
|
|
|
62 if l:thisl =~ '^\s*[)}]'
|
|
|
63 " this line closed a block
|
|
|
64 let l:ind -= s:sw()
|
|
|
65 endif
|
|
|
66
|
|
|
67 " Colons are tricky.
|
|
|
68 " We want to outdent if it's part of a switch ("case foo:" or "default:").
|
|
|
69 " We ignore trying to deal with jump labels because (a) they're rare, and
|
|
|
70 " (b) they're hard to disambiguate from a composite literal key.
|
|
|
71 if l:thisl =~# '^\s*\(case .*\|default\):$'
|
|
|
72 let l:ind -= s:sw()
|
|
|
73 endif
|
|
|
74
|
|
|
75 return l:ind
|
|
|
76 endfunction
|
|
|
77
|
|
|
78 " vim: sw=2 sts=2 et
|
