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53befeb700
(Not quite finished, the following will be done tomorrow. module/srfi/*.scm module/rnrs/*.scm module/scripts/*.scm testsuite/*.scm guile-readline/* )
92 lines
3.2 KiB
EmacsLisp
92 lines
3.2 KiB
EmacsLisp
;;; ppexpand.el --- temporarily expanding macros in a pretty way.
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;; Copyright (C) 2000, 2006 Free Software Foundation, Inc.
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free
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;;;; Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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;;;; 02111-1307 USA
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;;; Author: Mikael Djurfeldt <djurfeldt@nada.kth.se>
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;;; Commentary:
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;; Commands for editing multiline ANSI C compatible string literals.
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;;; Code:
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(require 'cmacexp)
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(defvar if-mark "#if 0 /* PPEXPAND */")
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(defvar else-mark "#else /* PPEXPAND */")
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(defvar endif-mark "#endif /* PPEXPAND */")
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(define-key c-mode-map "\C-ce" 'ppexpand)
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(defun ppexpand (start end &optional undo)
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"Expand C macros in the region, using the C preprocessor.
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The expanded code is run through the `indent' command and inserted
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into the program next to the original code, using an #if/#else/#endif
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construct.
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Given a prefix argument, it reverts the change, removing the
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#if/#else/#endif construct and the expanded code.
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`c-macro-preprocessor' specifies the preprocessor to use.
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Prompt for arguments to the preprocessor \(e.g. `-DDEBUG -I ./include')
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if the user option `c-macro-prompt-flag' is non-nil.
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Noninteractive args are START, END, UNDO.
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For use inside Lisp programs, see also `c-macro-expansion'."
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(interactive (if current-prefix-arg
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(list nil nil t)
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(let ((pos1 (point))
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(pos2 (mark)))
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(if (< pos1 pos2)
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(list pos1 pos2 nil)
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(list pos2 pos1 nil)))))
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(let ((inbuf (current-buffer)))
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;; Build the command string.
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(if c-macro-prompt-flag
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(setq c-macro-cppflags
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(read-string "Preprocessor arguments: "
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c-macro-cppflags)))
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(if undo
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(let ((pos (point)) if-pos else-pos endif-pos)
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(save-excursion
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(end-of-line)
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(if (not (and (setq if-pos (search-backward if-mark nil t))
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(setq else-pos (search-forward else-mark nil t))
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(setq endif-pos (search-forward endif-mark nil t))
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(<= if-pos pos)
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(< pos endif-pos)))
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(error "Not in ppexpanded region"))
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(let ((orig (buffer-substring (+ if-pos (length if-mark) 1)
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(- else-pos (length else-mark)))))
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(delete-region if-pos (+ endif-pos 1))
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(insert orig))))
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;; Expand the macro.
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(let* ((expansion (c-macro-expansion start end
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(concat c-macro-preprocessor " "
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c-macro-cppflags) t))
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(orig (buffer-substring start end)))
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(setq expansion
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(with-temp-buffer
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(insert expansion)
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(call-process-region (point-min) (point-max) "indent"
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t ;delete the text
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t ;output --> current buffer
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)
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(buffer-string)))
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(delete-region start end)
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(insert if-mark ?\n orig else-mark ?\n expansion endif-mark ?\n)))))
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