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Date: Fri, 02 May 2003 22:36:00 -0000
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Cc: gcc-prs@gcc.gnu.org,
From: Martin Sebor <sebor@roguewave.com>
Subject: Re: c++/10606: uncaught_exception() returns false too early
Reply-To: Martin Sebor <sebor@roguewave.com>
X-SW-Source: 2003-05/txt/msg00161.txt.bz2
List-Id: <gcc-prs.sourceware.org>

The following reply was made to PR c++/10606; it has been noted by GNATS.

From: Martin Sebor <sebor@roguewave.com>
To: gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: c++/10606: uncaught_exception() returns false too early
Date: Fri, 02 May 2003 16:34:42 -0600

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10606
 
 Here's another test case that also shows that the function
 fails to return true after the exception has been rethrown:
 
 $ cat t.cpp; g++ t.cpp && ./a.out
 #include <stdio.h>
 #include <exception>
 
 void foo (const void*);
 
 int main ()
 {
 #define SHOW(fun)   \
      printf ("%s(%d): %s: uncaught_exception() = %d\n", \
              __FILE__, __LINE__, fun, std::uncaught_exception ())
 
      static int n;
 
      struct S {
          int id;
          S (): id (n++) {
              printf ("S::S() [%d]: uncaught_exception() = %d\n",
                      id, std::uncaught_exception ());
          }
          S (const S &s): id (n++) {
              printf ("S::S(const S& [%d]) [%d]: uncaught_exception() = 
 %d\n",
                      s.id, id, std::uncaught_exception ());
          }
          ~S () {
              printf ("S::~S() [%d]: uncaught_exception() = %d\n",
                      id, std::uncaught_exception ());
          }
      };
      try {
          try {
              S s;
              SHOW ("throw");
              throw s;
          }
          catch (S s) {
              SHOW ("catch");
              foo (&s);
              throw;
          }
      }
      catch (S s) {
          SHOW ("catch");
          foo (&s);
      }
 }
 
 void foo (const void*) { }
 S::S() [0]: uncaught_exception() = 0
 t.cpp(32): throw: uncaught_exception() = 0
 S::S(const S& [0]) [1]: uncaught_exception() = 0
 S::~S() [0]: uncaught_exception() = 1
 S::S(const S& [1]) [2]: uncaught_exception() = 0
 t.cpp(36): catch: uncaught_exception() = 0
 S::~S() [2]: uncaught_exception() = 0
 S::S(const S& [1]) [3]: uncaught_exception() = 0
 t.cpp(42): catch: uncaught_exception() = 0
 S::~S() [3]: uncaught_exception() = 0
 S::~S() [1]: uncaught_exception() = 0