r275177 - in /trunk/libstdc++-v3: ChangeLog inc...

[redi@gcc.gnu.org]

Author: redi
Date: Fri Aug 30 13:54:49 2019
New Revision: 275177

URL: https://gcc.gnu.org/viewcvs?rev=275177&root=gcc&view=rev
Log:
PR libstdc++/89164 enforce constraints for uninitialized algos

The memmove optimizations for std::uninitialized_copy/fill/_n will
compile even if the type is not copy constructible, because std::copy
doesn't require copy construction to work. But the uninitialized
algorithms do require it.

This adds explicit static assertions to ensure we don't allow ill-formed
initializations.

	PR libstdc++/89164
	* include/bits/stl_algobase.h (__copy_move): Give descriptive names
	to template parameters.
	* include/bits/stl_uninitialized.h (uninitialized_copy)
	(uninitialized_fill, uninitialized_fill_n): Add static assertions to
	diagnose invalid uses.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
	Adjust expected error.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy/89164.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy_n/
	89164.cc: New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_fill/89164.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_fill_n/
	89164.cc: New test.
	* testsuite/23_containers/vector/cons/89164.cc: New test.
	* testsuite/23_containers/vector/cons/89164_c++17.cc: New test.

Added:
    trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/89164.cc
      - copied, changed from r275063, trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
    trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy_n/89164.cc
      - copied, changed from r275063, trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
    trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_fill/89164.cc
      - copied, changed from r275063, trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
    trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_fill_n/89164.cc
      - copied, changed from r275063, trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
    trunk/libstdc++-v3/testsuite/23_containers/vector/cons/89164.cc
      - copied, changed from r275063, trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc
    trunk/libstdc++-v3/testsuite/23_containers/vector/cons/89164_c++17.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/stl_algobase.h
    trunk/libstdc++-v3/include/bits/stl_uninitialized.h
    trunk/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc