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;;; ghc-core.el --- Syntax highlighting module for GHC Core
;; Copyright (C) 2010 Johan Tibell
;; Author: Johan Tibell <>
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Purpose:
;; To make it easier to read GHC Core output by providing highlighting
;; and removal of commonly ignored annotations.
;;; Code:
(require 'haskell-mode)
(require 'haskell-font-lock)
(defun ghc-core-clean-region (start end)
"Remove commonly ignored annotations and namespace
prefixes in the given region."
(interactive "r")
(narrow-to-region start end)
(goto-char (point-min))
(while (search-forward-regexp "GHC\.[^\.]*\." nil t)
(replace-match "" nil t))
(goto-char (point-min))
(while (flush-lines "^ *GblId *$" nil))
(goto-char (point-min))
(while (flush-lines "^ *LclId *$" nil))
(goto-char (point-min))
(while (flush-lines (concat "^ *\\[\\(?:Arity [0-9]+\\|NoCafRefs\\|"
"Str: DmdType\\|Worker \\)"
"\\([^]]*\\n?\\).*\\] *$") nil))
(goto-char (point-min))
(while (search-forward "Main." nil t) (replace-match "" nil t))))
(defun ghc-core-clean-buffer ()
"Remove commonly ignored annotations and namespace
prefixes in the current buffer."
(ghc-core-clean-region (point-min) (point-max)))
(defun ghc-core-create-core ()
"Compiled and load the current buffer as tidy core"
(let ((core-buffer (generate-new-buffer "ghc-core"))
(neh (lambda () (kill-buffer core-buffer))))
(add-hook 'next-error-hook neh)
(call-process "ghc" nil core-buffer nil "-c" "-ddump-simpl" "-O2" (buffer-file-name))
(display-buffer core-buffer)
(with-current-buffer core-buffer
(remove-hook 'next-error-hook neh)))
(add-to-list 'auto-mode-alist '("\\.hcr\\'" . ghc-core-mode))
(define-derived-mode ghc-core-mode haskell-mode "GHC-Core"
"Major mode for GHC Core files.")
(provide 'ghc-core)
;;; ghc-core.el ends here