According to our synopsis it belonged to ios_fwd. This is not true in
the C++11 version of the Standard, I did not validate against C++98.
Moving this to ios's forward where it's declared in the standard allows
removing a module quirk. An earlier removal of std::vectors forward
declaration allows to remove all quirks for the iosfwd module part.
Since iosfwd includes __fwd/ios.h this does not change the required
includes.
The module validation script of D144994 validate whether the contents of
an include match its module. An include is the set of files matching the
pattern:
- foo
- foo/*.
- __fwd/foo.h
Several declarations of the stream headers are in the header iosfwd.
This gives issue using the validation script. Adding iosfwd to the set
of matching files gives too many declarations. For example when
validating the fstream header it will pull in declarations of the
istream header. Instead if writing a set of filters the headers are
granularized into smaller headers containing the expected declarations.
Reviewed By: #libc, ldionne
Differential Revision: https://reviews.llvm.org/D148927
