1 files changed, 44 insertions, 0 deletions
diff --git a/runtime/indent/yacc.vim b/runtime/indent/yacc.vim
new file mode 100644
index 000000000..4ea8f6a2d
--- /dev/null
+++ b/runtime/indent/yacc.vim
@@ -0,0 +1,44 @@
+" Vim indent file
+" Language:	    YACC input file
+" Maintainer:	    Nikolai Weibull <source@pcppopper.org>
+" URL:		    http://www.pcppopper.org/vim/indent/pcp/yacc/
+" Latest Revision:  2004-04-25
+" arch-tag:	    629aa719-8fe4-4787-adb7-ae94ca801610
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+  finish
+endif
+
+let b:did_indent = 1
+
+setlocal indentexpr=GetYaccIndent()
+setlocal indentkeys=!^F,o,O
+
+" Only define the function once.
+if exists("*GetYaccIndent")
+  finish
+endif
+
+function GetYaccIndent()
+  if v:lnum == 1
+    return 0
+  endif
+
+  let ind = indent(v:lnum - 1)
+  let line = getline(v:lnum - 1)
+
+  if line == ''
+    let ind = 0
+  elseif line =~ '^\w\+\s*:'
+    let ind = ind + matchend(line, '^\w\+\s*')
+  elseif line =~ '^\s*;'
+    let ind = 0
+  else
+    let ind = indent(v:lnum)
+  endif
+
+  return ind
+endfunction
+
+" vim: set sts=2 sw=2: