11-219r1
To: J3
From: Van Snyder/Malcolm Cohen
Subject: Interpretation request F03/0116 revisited
Date: 2011 July 01

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NUMBER: F03/0116
TITLE: indistinguishable specifics for a generic interface with
       use association
KEYWORDS: GENERIC RESOLUTION USE ASSOCIATION
DEFECT TYPE: Erratum
STATUS: J3 consideration in progress

Consider the following program

       MODULE M1
         INTERFACE SUBR
           MODULE PROCEDURE SUBR1
         END INTERFACE
       CONTAINS
         SUBROUTINE SUBR1
         END SUBROUTINE
       END

       MODULE M2
         INTERFACE SUBR
           MODULE PROCEDURE SUBR2
         END INTERFACE
       CONTAINS
         SUBROUTINE SUBR2
         END SUBROUTINE
       END

       PROGRAM MAIN
         USE M1
         CALL S
       CONTAINS
         SUBROUTINE S
           USE M2
           CALL SUBR
         END SUBROUTINE
       END

Is this program standard conforming?

ANSWER:

Subclause 12.4.3.4.5 of the Fortran 2008 standard forbids the
presence of such conflicting interfaces.

The rules in subclause 12.5.5.2 would be able to resolve the reference
to SUBR in the example, but this fact does not negate the prohibition
in subclause 12.4.3.4.5.

EDITS:

None.

SUBMITTED BY: Robert Corbett and Michael Ingrassia

HISTORY: 08-169    m184  F03/0116 submitted
         11-219r1  m195  Revised answer.

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