| " Copyright 2011 The Go Authors. All rights reserved. |
| " Use of this source code is governed by a BSD-style |
| " license that can be found in the LICENSE file. |
| " |
| " indent/go.vim: Vim indent file for Go. |
| " |
| " TODO: |
| " - function invocations split across lines |
| " - general line splits (line ends in an operator) |
| |
| if exists("b:did_indent") |
| finish |
| endif |
| let b:did_indent = 1 |
| |
| " C indentation is too far off useful, mainly due to Go's := operator. |
| " Let's just define our own. |
| setlocal nolisp |
| setlocal autoindent |
| setlocal indentexpr=GoIndent(v:lnum) |
| setlocal indentkeys+=<:>,0=},0=) |
| |
| if exists("*GoIndent") |
| finish |
| endif |
| |
| function! GoIndent(lnum) |
| let prevlnum = prevnonblank(a:lnum-1) |
| if prevlnum == 0 |
| " top of file |
| return 0 |
| endif |
| |
| " grab the previous and current line, stripping comments. |
| let prevl = substitute(getline(prevlnum), '//.*$', '', '') |
| let thisl = substitute(getline(a:lnum), '//.*$', '', '') |
| let previ = indent(prevlnum) |
| |
| let ind = previ |
| |
| if prevl =~ '[({]\s*$' |
| " previous line opened a block |
| let ind += &sw |
| endif |
| if prevl =~# '^\s*\(case .*\|default\):$' |
| " previous line is part of a switch statement |
| let ind += &sw |
| endif |
| " TODO: handle if the previous line is a label. |
| |
| if thisl =~ '^\s*[)}]' |
| " this line closed a block |
| let ind -= &sw |
| endif |
| |
| " Colons are tricky. |
| " We want to outdent if it's part of a switch ("case foo:" or "default:"). |
| " We ignore trying to deal with jump labels because (a) they're rare, and |
| " (b) they're hard to disambiguate from a composite literal key. |
| if thisl =~# '^\s*\(case .*\|default\):$' |
| let ind -= &sw |
| endif |
| |
| return ind |
| endfunction |