2018-11-28 Edward Smith-Rowland <3dw4rd@verizon.net> Implement uniform container erasure for C++20. * include/Makefile.am: Move erase_if.h. * include/Makefile.in: Move erase_if.h. * include/experimental/bits/erase_if.h: Move ... * include/bits/erase_if.h: ... here. * include/experimental/map: Move erase_if.h. * include/experimental/set: Move erase_if.h. * include/experimental/unordered_map: Move erase_if.h. * include/experimental/unordered_set: Move erase_if.h. * include/std/deque (erase_if, erase): New functions. * include/std/forward_list: Ditto. * include/std/list: Ditto. * include/std/map: Ditto. * include/std/set: Ditto. * include/std/string: Ditto. * include/std/unordered_map: Ditto. * include/std/unordered_set: Ditto. * include/std/vector: Ditto. * testsuite/21_strings/basic_string/erasure.cc: New test. * testsuite/23_containers/deque/erasure.cc: New test. * testsuite/23_containers/forward_list/erasure.cc: New test. * testsuite/23_containers/list/erasure.cc: New test. * testsuite/23_containers/map/erasure.cc: New test. * testsuite/23_containers/set/erasure.cc: New test. * testsuite/23_containers/unordered_map/erasure.cc: New test. * testsuite/23_containers/unordered_set/erasure.cc: New test. * testsuite/23_containers/vector/erasure.cc: New test. From-SVN: r266567
