[PATCH, fortran] tabs are evil

[Steve Kargl <sgk at troutmask dot apl dot washington dot edu>]

The attached patch issues an error if one uses a 
tab in a context where a member of the Fortran
Character Set is expected.  By default gfortran
will accept a tab as whitespace, which is its
current behavior.  I have added the -ftabs option.
For -ftabs, we accept tabs as whitespace, and 
for -fno-tabs we issue an error.  Note that
-pedantic and/or -std=f95 will trigger the error.
Also, note that "-std=f95 -ftabs" accepts tabs
as whitespaces.


2006-03-05  Steven G. Kargl  <kargls@comcast.net>

	* gfortran.h: Wrap Copyright line.
	(gfc_option_t): add flag_tabs member.
	* lang.opt: Update Coyright year.  Add the ftabs.
	* scanner.c (gfc_gobble_whitespace): Use flag_tabs.
	(load_line): Add seen_comment.  Use it and flag_tabs.
	* options.c (gfc_init_options): Initialize flag_tabs.
	(gfc_post_options): Adjust flag_tabs depending on -pedantic.
	(gfc_handle_option):  Process command-line option -f[no-]tabs


I just realized that I didn't update gfortran.texi.  I'll
add a description of the new option before I commit.

-- 
Steve

Attachment: tabs-fortran.diff
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