BUG: FOR4280 Warning Given for Unused Result Variables

ID: Q150126

The information in this article applies to:

Microsoft Fortran PowerStation for Windows 95 and Windows NT, version 4.0

SYMPTOMS

The compiler erroneously gives the following warning message for unused function result variables: warning FOR4280: unused local variable <name>

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Function result variables are not local variables. Therefore, the compiler should not generate the FOR4280 warning message for unused function result variables.

When compiling the sample code provided, the compiler issues two warning messages: warning FOR4280: unused local variable R

-and-

warning FOR4290: function FUNC has not been pointer assigned nor allocated

The first compiler message is the incorrect FOR4280 warning message. However, the second message is correct as FUNC expects to return a pointer to an integer but R has no storage space allocated to it.

Sample Code to Illustrate Problem


! Compile options needed: /c

      module mod
      contains
          function func() result(r)
          integer, pointer :: r
          end function func
      end module mod

Additional query words: 4.00

Keywords : kbFortranPS kbLangFortran
Version : :4.0
Platform : NT WINDOWS
Issue type :