c++/8279: REGRESSION: failure to find a matching function in ostream_iterator expansion

[jbuck@synopsys.com]

>Number:         8279
>Category:       c++
>Synopsis:       REGRESSION: failure to find a matching function in ostream_iterator expansion
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Oct 18 13:56:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Joe Buck
>Release:        gcc-3.2
>Organization:
>Environment:
both linux (red hat 7.2) and solaris (sparc 2.7)
>Description:
The attached program compiles and runs correctly under
gcc 2.95.2, but fails to compile under gcc 3.2 (including
the release branch as of 17 Oct).  The compiler complains
that it cannot find a compatible operator<< while expanding
the ostream_iterator template, even though an exact match
is present.  Defining HIDE_BUG reveals that the compiler is
perfectly capable of finding the operator<< and using it
when a loop, rather than std::copy to the ostream_iterator,
is used
>How-To-Repeat:
Do
gcc -c map_test.cpp
for comparison, try
gcc -c -DHIDE_BUG map_test.cpp
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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