1 files changed, 46 insertions, 34 deletions
diff --git a/indent/go.vim b/indent/go.vim
index 660aa506..a3fa2b7a 100644
--- a/indent/go.vim
+++ b/indent/go.vim
@@ -9,7 +9,7 @@
 " - general line splits (line ends in an operator)
 
 if exists("b:did_indent")
-    finish
+	finish
 endif
 let b:did_indent = 1
 
@@ -21,46 +21,58 @@ setlocal indentexpr=GoIndent(v:lnum)
 setlocal indentkeys+=<:>,0=},0=)
 
 if exists("*GoIndent")
-  finish
+	finish
+endif
+
+" use shiftwidth function only if it's available
+if exists('*shiftwidth')
+	func s:sw()
+		return shiftwidth()
+	endfunc
+else
+	func s:sw()
+		return &sw
+	endfunc
 endif
 
 function! GoIndent(lnum)
-  let prevlnum = prevnonblank(a:lnum-1)
-  if prevlnum == 0
-    " top of file
-    return 0
-  endif
+	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)
+	" 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
-  let s:shiftwidth = shiftwidth()
+	let ind = previ
 
-  if prevl =~ '[({]\s*$'
-    " previous line opened a block
-    let ind += s:shiftwidth
-  endif
-  if prevl =~# '^\s*\(case .*\|default\):$'
-    " previous line is part of a switch statement
-    let ind += s:shiftwidth
-  endif
-  " TODO: handle if the previous line is a label.
+	if prevl =~ '[({]\s*$'
+		" previous line opened a block
+		let ind += s:sw()
+	endif
+	if prevl =~# '^\s*\(case .*\|default\):$'
+		" previous line is part of a switch statement
+		let ind += s:sw()
+	endif
+	" TODO: handle if the previous line is a label.
 
-  if thisl =~ '^\s*[)}]'
-    " this line closed a block
-    let ind -= s:shiftwidth
-  endif
+	if thisl =~ '^\s*[)}]'
+		" this line closed a block
+		let ind -= s: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 -= s: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 -= s:sw()
+	endif
 
-  return ind
+	return ind
 endfunction
+
+" vim:ts=4:sw=4:et