[Caml-list] Vim 6.0 OCaml indent file

[Caml-list] Vim 6.0 OCaml indent file

[Michael Leary]

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Now that vim 6.0 is in beta, it seems like a good time for me to throw out
what I've got so far (not much) for an ocaml ident file.  It's been a while
since I looked at this, and I don't rightly recall how spiffy it was when I
left it. :-}

I would most appreciate any comments, critcisms, pointers, patches, flames,
and samples of money from around the world...

I've tried to follow the official OCaml style guide, but I've also tried to
choose consistency over fanciness -- mostly because its a lot easier to
code, and I'm no genius in either indent files or OCaml. :)

For reference, this is the notion of indenting that I've been working from.
Indent file follows.


(* either like the first one if not on one line, else like the second *)
let
	...
in

let ... in


(* either like the first one if not on one line, else like the second *)
try
	...
with

try ... with
...


(* either like the first one if not on one line, else like the second *)
match
	...
with

match ... with
...


(* indent after a line ending with = *)
=
	...

(* outdent when the line is just ;; *)
	...
;;

(* um... I forget... outdent a line ending in ;; seems off... *)
	...
...;;

(* indent after a line ending with 'then' *)
(* outdent a line starting with 'else' *)
then$
	...
^else

(* indent after a line ending with 'begin' *)
(* outdent a line starting with 'end' *)
begin$
	...
^end




" Vim indent file
" Language:	OCaml
" Maintainer:	Mike Leary <leary@nwlink.com>
" Last Change:	2001/06/28
" URL: http://www.nwlink.com/~leary/ocaml.vim

" Only load this indent file when no other was loaded.
if exists("b:did_indent")
  finish
endif
let b:did_indent = 1

setlocal indentexpr=GetOCamlIndent()
setlocal nolisp
setlocal nosmartindent
setlocal indentkeys+==in,=with,=else,=end,=;;,=|
setlocal textwidth=80

" Only define the function once.
if exists("*GetOCamlIndent")
  finish
endif

function GetOCamlIndent()
  " Find a non-blank line above the current line.
  let lnum = prevnonblank(v:lnum - 1)

  " At the start of the file use zero indent.
  if lnum == 0
    return 0
  endif

  let ind = indent(lnum)

  " indent after a line starts with 'let' and doesn't end with 'in'
	if getline(lnum) =~ '^\s*\(\<let\>\)' && getline(lnum) !~ '\(\<in\>\)\s*$'
    let ind = ind + &sw 
	endif

  " indent after a line starts with 'try' or 'match' and doesn't end with 'with'
	" and set the alignment for cases
	if getline(lnum) =~ '^\s*\(\<try\>\|\<match\>\)' && getline(lnum) !~ '\(\<with\>\)\s*$'
    let ind = ind + &sw 
		let align = indent(v:lnum)
	endif

  " indent after a line ends with '=', 'then', 'begin', or '->'
	if getline(lnum) =~ '\(\<then\>\|\<begin\>\|->\|=\)\s*$'
    let ind = ind + &sw 
	endif

  " outdent immediately when a line starts with 'in', 'with', 'else', 'end', or ';;'
  if getline(v:lnum) =~ '^\s*\(\<in\>\|\<with\>\|\<else\>\|\<end\>\|;;\)'
    let ind = ind - &sw
	endif

	" outdent after a line ends with ';;', but had something before it
	if getline(lnum) =~ '\s*\S+\s*;;\s*$'
    let ind = ind - &sw
  endif

	" set indent to align when a line starts with '|'
	if getline(v:lnum) =~ '^\s*|'
		let ind = align
  endif

  return ind
endfunction

" vim:sw=2

-- 
Would you mind terribly much if I asked you
to take your silly-assed problem down the hall?  
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