[Bug c/31924] New: gcc accepts invalid suffixes for decimal float constants

[Bug c/31924] New: gcc accepts invalid suffixes for decimal float constants

[janis at gcc dot gnu dot org]

The change to the C preprocessor to recognize "df", "dd", and "dl" as suffixes
for decimal floating point constants also allows "fd" and "ld"; a check for
that assumed that the the letters are examined from left to right, but they are
examined from right to left.  There are no errors for the following:

  double a = 1.ld;
  double b = 1.fd;

I'm testing a fix, but wanted a PR to reference for a patch to the 4.2 branch.


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           Summary: gcc accepts invalid suffixes for decimal float constants
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: accepts-invalid
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: janis at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31924

[Bug c/31924] gcc accepts invalid suffixes for decimal float constants

[janis at gcc dot gnu dot org]

------- Comment #1 from janis at gcc dot gnu dot org  2007-05-15 00:43 -------
Subject: Bug 31924

Author: janis
Date: Mon May 14 23:43:07 2007
New Revision: 124730

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=124730
Log:
libcpp/
        PR c/31924
        * expr.c (interpret_float_suffix): Check for invalid suffix.
gcc/testsuite/
        PR c/31924
        * gcc.dg/fltconst-1.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/fltconst-1.c
Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/libcpp/ChangeLog
    trunk/libcpp/expr.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31924

[Bug c/31924] gcc accepts invalid suffixes for decimal float constants

[janis at gcc dot gnu dot org]

------- Comment #2 from janis at gcc dot gnu dot org  2007-05-21 22:17 -------
Subject: Bug 31924

Author: janis
Date: Mon May 21 21:17:23 2007
New Revision: 124913

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=124913
Log:
libcpp/
        PR c/31924
        * expr.c (interpret_float_suffix): Check for invalid suffix.
gcc/testsuite/
        PR c/31924
        * gcc.dg/fltconst-1.c: New test.

Modified:
    branches/ibm/gcc-4_1-branch/gcc/testsuite/ChangeLog
    branches/ibm/gcc-4_1-branch/libcpp/ChangeLog
    branches/ibm/gcc-4_1-branch/libcpp/expr.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31924

[Bug c/31924] gcc accepts invalid suffixes for decimal float constants

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2007-06-24 03:49 -------
Fixed.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31924