V3 PATCH: Insert `typename' and `ios_base::' where required

[Gabriel Dos Reis]

Mark Mitchell <mark@codesourcery.com> writes:

| >>>>> "Gabriel" == Gabriel Dos Reis <gdr@codesourcery.com> writes:
| 
|     Gabriel> Is there a reason why GCC's extension for variable-length
|     Gabriel> array of fondamental types can't be supported here?
| 
| It would be -- except that when the library is compiled with -pedantic
| it's not.  

That should not happen -- anything included by a system header should
be noted as a system header, and unless -Wsystem-header is specified
there should be no diagnostic for extension constructs in such a header.
If that happens, the compiler we should fix the compiler.

| Can we just add `#pragma GCC system_header' to ostream.tcc?  Should
| that go in all the .tcc files?

That might be a short-term solution, but there ought to be a way to
convince the compiler not to diagnose extension constructs in system
headers. 

-- Gaby
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