/usr/share/source-highlight/caml.lang is in libsource-highlight-common 3.1.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | preproc = '\<(?:external|open|include|[A-Z][\w\']*(?=\.))\>'
include "number.lang"
string delim "\"" "\"" escape "\\"
keyword = "and|as|assert|asr|begin|class|closed|constraint|do|done|downto|else|end|exception|false|for|fun|function|functor|if|in|inherit|initializer|land|lazy|let|lor|lsl|lsr|lxor|match|method|mod|module|mutable|new|object|of|or|parser|private|rec|sig|struct|then|to|true|try|type|val|virtual|when|while|with"
comment delim "(*" "*)" multiline nested
type = '\<(?:[A-Z][\w\']*(?!\.)|int|int32|int64|nativeint|bool|char|exn|option|float|unit|string|list|array|ref|format|format4|lazy_t|in_channel|out_channel)\>'
include "symbols.lang"
cbracket = "{|}"
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