Add v language, closes #437

indent/vlang.vim

@@ -0,0 +1,69 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'v') == -1
+
+" Based on the Go identation file.
+"
+" 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.
+
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+
+setlocal nolisp
+setlocal autoindent
+setlocal indentexpr=VlangIndent(v:lnum)
+setlocal indentkeys+=<:>,0=},0=)
+
+if exists("*VlangIndent")
+  finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+function! VlangIndent(lnum) abort
+  let prevlnum = prevnonblank(a:lnum-1)
+  if prevlnum == 0
+    return 0
+  endif
+
+  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 += shiftwidth()
+  endif
+  if prevl =~# '^\s*\(case .*\|default\):$'
+    " previous line is part of a switch statement
+    let ind += shiftwidth()
+  endif
+
+  if thisl =~ '^\s*[)}]'
+    " this line closed a block
+    let ind -= shiftwidth()
+  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 -= shiftwidth()
+  endif
+
+  return ind
+endfunction
+
+" restore Vi compatibility settings
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim: sw=2 ts=2 et
+
+endif