libstdc++/1968: bits/std_fstream.h fails to define typedef for _ctype_type.

[bumgard@roguewave.com]

>Number:         1968
>Category:       libstdc++
>Synopsis:       bits/std_fstream.h fails to define typedef for _ctype_type.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Feb 13 12:46:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Gregory Bumgardner
>Release:        gcc_3_0_branch as of 20010212
>Organization:
>Environment:
N/A
>Description:
The basic_filebuf::imbue() functon in bits/fstream.tcc has
a call to use_facet<_ctype_type>() but _ctype_type has not 
been defined.
>How-To-Repeat:
Use imbue() function on an instantiation of basic_filebuf.
>Fix:
Add the following typedef to the basic_filebuf class decl
in bits/std_fstream.h

  typedef ctype<_CharT> _ctype_type;

I will submit a patch.
>Release-Note:
>Audit-Trail:
>Unformatted: