re PR fortran/29835 (Error message of unknown edit descriptor needs improvement)

re PR fortran/29835 (Error message of unknown edit descriptor needs improvement)

2008-07-22  Daniel Kraft  <d@domob.eu>

	PR fortran/29835
	* io.c (error_element), (format_locus):  New static globals.
	(unexpected_element):  Spelled out this message fully.
	(next_char):  Keep track of locus when not MODE_STRING.
	(next_char_not_space):  Remember last parsed element in error_element.
	(format_lex):  Fix two indentation errors.
	(check_format):  Use format_locus and possibly error_element for a
	slightly better error message on invalid format.
	(check_format_string):  Set format_locus to start of the string
	expression used as format.

2008-07-22  Daniel Kraft  <d@domob.eu>

	PR fortran/29835
	* io/format.c (struct format_data):  New member error_element.
	(unexpected_element):  Added '%c' to message.
	(next_char):  Keep track of last parsed character in fmt->error_element.
	(format_error):  If the message is unexpected_element, output the
	offending character, too.

2008-07-22  Daniel Kraft  <d@domob.eu>

	PR fortran/29835
	* gfortran.dg/fmt_error_3.f90:  New test.
	* gfortran.dg/fmt_error_4.f90:  New test.
	* gfortran.dg/fmt_error_5.f90:  New test.

From-SVN: r138063