[PATCH]: C++ P0482R5 char8_t implementation

[Tom Honermann]

The following patch set was posted to gcc-patches, but I failed to copy 
the libstdc++ list.  Links to the archived posts to gcc-patches are 
below; patches 5-9 apply to libstdc++.


[PATCH 0/9]: C++ P0482R5 char8_t implementation:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00292.html


Changes affecting core language and related tests:

[PATCH 1/9]: C++ P0482R5 char8_t: Documentation updates:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00293.html

[PATCH 2/9]: C++ P0482R5 char8_t: Core language support:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00294.html

[PATCH 3/9]: C++ P0482R5 char8_t: New core language tests:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00295.html

[PATCH 4/9]: C++ P0482R5 char8_t: Updates to existing core language tests:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00296.html


Changes affecting libstdc++ and related tests:

[PATCH 5/9]: C++ P0482R5 char8_t: Standard library support:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00298.html

[PATCH 6/9]: C++ P0482R5 char8_t: A small correction to a common 
testsuite header file:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00297.html

[PATCH 7/9]: C++ P0482R5 char8_t: New standard library tests:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00299.html

[PATCH 8/9]: C++ P0482R5 char8_t: Updates to existing standard library 
tests:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00301.html

[PATCH 9/9]: C++ P0482R5 char8_t: Updates to gdb pretty printing support:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00300.html

Tom.