[Bug fortran/27634] New: formatted reading/writing: real format without dot

[Bug fortran/27634] New: formatted reading/writing: real format without dot

[manfred99 at gmx dot ch]

real      val
      character str*6
      open(1,FILE="tmp.dat")
      read(1,'(a6,f4)') str,val
      print*,str,val
      end

gfortran tells me as follows:
      read(1,'(a6,f4)') str,val
                                                                       1
Warning: Period required in format string at (1)

# ./a.out
At line 4 of file read_gfc_test.f
Fortran runtime error: Period required in format
(a6,f4)
      ^

At compile time, gfortran issues only a warning, although it aborts
unconditionally at runtime, which comes as a bad surprise.
Either gfortran should abort at compile time, or it should support
this syntax ("f4" as an equivalent of "f4.0").
Same issue also for writing.

Support would be probably easy (not regtested, but works for me):
At Line 726 of libgfortran/io/format.c:
      if (t != FMT_PERIOD)
        {
          /* We treat missing decimal descriptor as 0 !! */
          fmt->saved_token = t;
          tail->u.real.d = 0;
          break;
        }

This is a regression vs. g77.


-- 
           Summary: formatted reading/writing: real format without dot
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: manfred99 at gmx dot ch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27634

[Bug fortran/27634] formatted reading/writing: real format without dot

[jvdelisle at gcc dot gnu dot org]

------- Comment #1 from jvdelisle at gcc dot gnu dot org  2006-05-17 00:16 -------
I will investigate this a bit.


-- 

jvdelisle at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jvdelisle at gcc dot gnu dot
                   |dot org                     |org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-05-17 00:16:35
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27634

[Bug fortran/27634] formatted reading/writing: real format without dot

[patchapp at dberlin dot org]

------- Comment #2 from patchapp at dberlin dot org  2006-05-22 04:35 -------
Subject: Bug number PR27634

A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is
http://gcc.gnu.org/ml/gcc-patches/2006-05/msg01083.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27634

[Bug fortran/27634] formatted reading/writing: real format without dot

[jvdelisle at gcc dot gnu dot org]

------- Comment #3 from jvdelisle at gcc dot gnu dot org  2006-05-29 19:29 -------
Subject: Bug 27634

Author: jvdelisle
Date: Mon May 29 19:28:48 2006
New Revision: 114212

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114212
Log:
2006-05-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

        PR libgfortran/27634
        * io/format.c (parse_format_list): Allow missing period in format only
        if -std=legacy.

Modified:
    trunk/libgfortran/ChangeLog
    trunk/libgfortran/io/format.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27634

[Bug fortran/27634] formatted reading/writing: real format without dot

[jvdelisle at gcc dot gnu dot org]

------- Comment #4 from jvdelisle at gcc dot gnu dot org  2006-05-29 19:34 -------
Subject: Bug 27634

Author: jvdelisle
Date: Mon May 29 19:33:43 2006
New Revision: 114213

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114213
Log:
2006-05-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

        PR fortran/27634
        * io.c (check_format): Add error for missing period in format
        specifier unless -std=legacy.
        * gfortran.texi: Add description of expanded namelist read and
        missing period in format extensions.

Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/gfortran.texi
    trunk/gcc/fortran/io.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27634

[Bug fortran/27634] formatted reading/writing: real format without dot

[jvdelisle at gcc dot gnu dot org]

------- Comment #5 from jvdelisle at gcc dot gnu dot org  2006-05-29 19:39 -------
Subject: Bug 27634

Author: jvdelisle
Date: Mon May 29 19:39:15 2006
New Revision: 114214

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114214
Log:
2006-05-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

        PR libgfortran/27634
        * gfortran.dg/fmt_missing_period_1.f: New test.
        * gfortran.dg/fmt_missing_period_2.f: New test.
        * gfortran.dg/fmt_missing_period_3.f: New test.

Added:
    trunk/gcc/testsuite/gfortran.dg/fmt_missing_period_1.f
    trunk/gcc/testsuite/gfortran.dg/fmt_missing_period_2.f
    trunk/gcc/testsuite/gfortran.dg/fmt_missing_period_3.f
Modified:
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27634

[Bug fortran/27634] formatted reading/writing: real format without dot

[jvdelisle at gcc dot gnu dot org]

------- Comment #6 from jvdelisle at gcc dot gnu dot org  2006-05-29 19:42 -------
Fixed on 4.2 only.  Will not go to 4.1


-- 

jvdelisle at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27634

[Bug fortran/27634] formatted reading/writing: real format without dot

[jvdelisle at gcc dot gnu dot org]

-- 

jvdelisle at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27634