The upcoming version of GtkSourceView, the library used by many Gnome
text editors for syntax highlighting, supports new and more powerful
language parsing.  I volunteer to update the language definition for
Ocaml, and would like some feedback from the community regarding useful
things to highlight.

The following are currently matched:
====================================

* Comments (* *), and within them, email addresses, net addresses and
TODO/FIXME/XXX

* Decimal, Octal, Hex, Binary and Floating point literals

* Labeled and Optional function arguments

* Polymorphic variants and normal Variant constructors

* Module paths (as a prefix to anything)

* Strings and Character Literals, with all escape codes allowed within
them sub-matched


The reasonably large list of keywords has been broken into four
sections.  (I encourage comments on this division.)

1) booleans
	true	false

2) flow control & common keywords
	and	assert	begin	do	done	downto	else
	end	for	fun	function	if	in
	let	match	rec	then	to	try	val
	when	while	with

3) types, objects & modules
	as	class	constraint	exception	external
	functor	include	inherit	initializer	method	module
	mutable	new	object	of	open	private	struct
	sig	type	virtual

4) function-like keywords
	asr	land	lazy	lor	lsl	lsr	lxor
	mod	or


Things not matched currently
============================

* Line number directives  (probably never seen in actual code)

* Record constructors - { record with label:value; label:value }

* Object duplication - {< var = value; var = value >}

* List literals - [ elem1; elem2; elem3 ]

* Array literals - [| elem1; elem2; elem3 |]

* Tuples - elem1, elem2, elem3  (hard to parse - no parentheses needed,
only commas)

* Array access and modification - arr.(i), arr.(i) <- 5

* String access and modification - str.[i], str[i] <- 'w'

* Coercion - ( expr :> type ), (expr : type1 :> type2)

* Method calls - obj#method args

* There's a ton of character-sequence keywords, are there any that
should be handled as a keyword, or should they be handled only in the
above cases where they're used?
    !=    #     &     &&    '     (     )     *     +     ,     -
    -.    ->    .     ..    :     ::    :=    :>    ;     ;;    <
    <-    =     >     >]    >}    ?     ??    [     [<    [>    [|
    ]     _     `     {     {<    |     |]    }     ~

* What about camlp4 keywords?  New keywords in the new camlp4?
    parser    <<    <:    >>    $     $$    $:


Thanks for your comments.  Attached is a compressed version of my
current language definition in the XML format required by gtksourceview.

E.