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-rw-r--r--runtime/indent/yacc.vim44
1 files changed, 44 insertions, 0 deletions
diff --git a/runtime/indent/yacc.vim b/runtime/indent/yacc.vim
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+" Vim indent file
+" Language: YACC input file
+" Maintainer: Doug Kearns <dougkearns@gmail.com>
+" Previous Maintainer: Nikolai Weibull <now@bitwi.se>
+" Last Change: 2022 April 25
+
+" 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
+setlocal nosmartindent
+
+let b:undo_indent = "setl inde< indk< si<"
+
+" 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