c++/5373: Statement expressions broken in C++

[Andreas Schwab <schwab@suse.de>]

>Number:         5373
>Category:       c++
>Synopsis:       Statement expressions broken in C++
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 14 02:26:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     
>Release:        3.1 20020107 (experimental)
>Organization:
>Environment:
System: Linux gadolinium 2.4.7-SMP #1 SMP Fri Nov 23 12:13:10 GMT 2001 ia64 unknown
Architecture: ia64

	
host: ia64-suse-linux-gnu
build: ia64-suse-linux-gnu
target: ia64-suse-linux-gnu
configured with: ../configure --enable-threads=posix --enable-long-long --prefix=/usr --with-local-prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/share/man --enable-languages=c,c++,f77,objc,java,ada --with-gxx-include-dir=/usr/include/g++ --with-slibdir=/lib --with-system-zlib --enable-shared ia64-suse-linux
>Description:
The C++ compiler does not accept certain kinds of statement expressions.
Apparently it only accepts those that can be folded to a simple constant
at compile time.
>How-To-Repeat:
$ cat stmtexpr.cc
int
main (int argc, char **argv)
{
  int a = ({ 1 ? 0 : 1; });
  return ({ argc > 1 ? 1 : 0; });
}
$ gcc -c stmtexpr.cc 
stmtexpr.cc: In function `int main(int, char**)':
stmtexpr.cc:5: void value not ignored as it ought to be
>Fix:
	
>Release-Note:
>Audit-Trail:
>Unformatted: