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+;; caml-font: font-lock support for OCaml files
+;;
+;; rewrite and clean-up.
+;; Changes:
+;; - fontify strings and comments using syntactic font lock
+;; - define a `font-lock-syntactic-face-function' to fontify ocamldoc comments
+;; - fontify infix operators like mod, land, lsl, etc.
+;; - fontify line number directives
+;; - fontify "failwith" and "invalid_arg" like "raise"
+;; - fontify '\x..' character constants
+;; - use the regexp-opt function to build regexps (more readable)
+;; - use backquote and comma in sexp (more readable)
+;; - drop the `caml-quote-char' variable (I don't use caml-light :))
+;; - stop doing weird things with faces
+
+
+(require 'font-lock)
+
+(defvar caml-font-stop-face
+ (progn
+ (make-face 'caml-font-stop-face)
+ (set-face-foreground 'caml-font-stop-face "White")
+ (set-face-background 'caml-font-stop-face "Red")
+ 'caml-font-stop-face))
+
+(defvar caml-font-doccomment-face
+ (progn
+ (make-face 'caml-font-doccomment-face)
+ (set-face-foreground 'caml-font-doccomment-face "Red")
+ 'caml-font-doccomment-face))
+
+(unless (facep 'font-lock-preprocessor-face)
+ (defvar font-lock-preprocessor-face
+ (copy-face 'font-lock-builtin-face
+ 'font-lock-preprocessor-face)))
+
+(defconst caml-font-lock-keywords
+ `(
+;character literals
+ ("'\\(.\\|\\\\\\([ntbr\"'\\\\]\\|[0-9]\\{3\\}\\|x[0-9A-Fa-f]\\{2\\}\\)\\)'"
+ . font-lock-string-face)
+;modules and constructors
+ ("`?\\<[A-Z][A-Za-z0-9_']*\\>" . font-lock-function-name-face)
+;definition
+ (,(regexp-opt '("and" "as" "constraint" "class"
+ "exception" "external" "fun" "function" "functor"
+ "in" "inherit" "initializer" "let"
+ "method" "mutable" "module" "of" "private" "rec"
+ "type" "val" "virtual")
+ 'words)
+ . font-lock-type-face)
+;blocking
+ (,(regexp-opt '("begin" "end" "object" "sig" "struct") 'words)
+ . font-lock-keyword-face)
+;linenums
+ ("# *[0-9]+" . font-lock-preprocessor-face)
+;infix operators
+ (,(regexp-opt '("asr" "land" "lor" "lsl" "lsr" "lxor" "mod") 'words)
+ . font-lock-builtin-face)
+;control
+ (,(concat "[|#&]\\|->\\|"
+ (regexp-opt '("do" "done" "dowto" "else" "for" "if" "ignore"
+ "lazy" "match" "new" "or" "then" "to" "try"
+ "when" "while" "with")
+ 'words))
+ . font-lock-constant-face)
+ ("\\<raise\\|failwith\\|invalid_arg\\>"
+ . font-lock-comment-face)
+;labels (and open)
+ ("\\(\\([~?]\\|\\<\\)[a-z][a-zA-Z0-9_']*:\\)[^:=]"
+ 1 font-lock-variable-name-face)
+ ("\\<\\(assert\\|open\\|include\\)\\>\\|[~?][ (]*[a-z][a-zA-Z0-9_']*"
+ . font-lock-variable-name-face)))
+
+
+(defun caml-font-syntactic-face (s)
+ (let ((in-string (nth 3 s))
+ (in-comment (nth 4 s))
+ (start (nth 8 s)))
+ (cond
+ (in-string 'font-lock-string-face)
+ (in-comment
+ (save-excursion
+ (goto-char start)
+ (cond
+ ((looking-at "(\\*\\*/\\*\\*)") 'caml-font-stop-face)
+ ((looking-at "(\\*\\*[^*]") 'caml-font-doccomment-face)
+ (t 'font-lock-comment-face)))))))
+
+
+;; font-lock commands are similar for caml-mode and inferior-caml-mode
+(defun caml-font-set-font-lock ()
+ (setq font-lock-defaults
+ '(caml-font-lock-keywords
+ nil nil nil nil
+ (font-lock-syntactic-face-function . caml-font-syntactic-face)))
+ (font-lock-mode 1))
+(add-hook 'caml-mode-hook 'caml-font-set-font-lock)
+
+
+
+(defconst inferior-caml-font-lock-keywords
+ `(("^[#-]" . font-lock-comment-face)
+ ,@caml-font-lock-keywords))
+
+(defun inferior-caml-set-font-lock ()
+ (setq font-lock-defaults
+ '(inferior-caml-font-lock-keywords
+ nil nil nil nil
+ (font-lock-syntactic-face-function . caml-font-syntactic-face)))
+ (font-lock-mode 1))
+(add-hook 'inferior-caml-mode-hooks 'inferior-caml-set-font-lock)
+
+(provide 'caml-font)