libstdc++: Implement C++20 features for <sstream>
New ctors and ::view() accessor for -
* basic_stingbuf
* basic_istringstream
* basic_ostringstream
* basic_stringstreamm
New ::get_allocator() accessor for basic_stringbuf.
libstdc++-v3/ChangeLog:
* acinclude.m4 (glibcxx_SUBDIRS): Add src/c++20.
* config/abi/pre/gnu.ver (GLIBCXX_3.4.29): New symbols.
* configure: Regenerate.
* include/std/sstream:
(basic_stringbuf::basic_stringbuf(allocator const&)): New constructor.
(basic_stringbuf::basic_stringbuf(openmode, allocator const&)): Likewise.
(basic_stringbuf::basic_stringbuf(basic_string&&, openmode)): Likewise.
(basic_stringbuf::basic_stringbuf(basic_stringbuf&&, allocator const&)):
Likewise.
(basic_stringbuf::get_allocator()): New method.
(basic_stringbuf::view()): Likewise.
(basic_istringstream::basic_istringstream(basic_string&&, openmode)):
New constructor.
(basic_istringstream::basic_istringstream(openmode, allocator const&)):
Likewise
(basic_istringstream::view()): New method.
(basic_ostringstream::basic_ostringstream(basic_string&&, openmode)):
New constructor.
(basic_ostringstream::basic_ostringstream(openmode, allocator const&)):
Likewise
(basic_ostringstream::view()): New method.
(basic_stringstream::basic_stringstream(basic_string&&, openmode)):
New constructor.
(basic_stringstream::basic_stringstream(openmode, allocator const&)):
Likewise
(basic_stringstream::view()): New method.
* src/Makefile.in: Add c++20 directory.
* src/Makefile.am: Regenerate.
* src/c++20/Makefile.am: Add makefile for new sub-directory.
* src/c++20/Makefile.in: Generate.
* src/c++20/sstream-inst.cc: New file defining explicit
instantiations for basic_stringbuf, basic_istringstream,
basic_ostringstream, and basic_stringstream member functions
added in C++20.
* testsuite/27_io/basic_stringbuf/cons/char/2.cc: New test.
* testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
* testsuite/27_io/basic_stringbuf/view/char/1.cc: Likewise.
* testsuite/27_io/basic_stringbuf/view/wchar_t/1.cc: Likewise.
* testsuite/27_io/basic_istringstream/cons/char/1.cc: Likewise.
* testsuite/27_io/basic_istringstream/cons/wchar_t/1.cc: Likewise.
* testsuite/27_io/basic_istringstream/view/char/1.cc: Likewise.
* testsuite/27_io/basic_istringstream/view/wchar_t/1.cc: Likewise.
* testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
* testsuite/27_io/basic_ostringstream/cons/wchar_t/1.cc: Likewise.
* testsuite/27_io/basic_ostringstream/view/char/1.cc: Likewise.
* testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc: Likewise.
* testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
* testsuite/27_io/basic_stringstream/cons/wchar_t/1.cc: Likewise.
* testsuite/27_io/basic_stringstream/view/char/1.cc: Likewise.
* testsuite/27_io/basic_stringstream/view/wchar_t/1.cc: Likewise.
a0e4d7b44c