[PATCH] Add deduction guides for C++17 (P0433R2, partial)

[Jonathan Wakely <jwakely at redhat dot com>]

This adds some of the C++17 deduction guides, all except for the
allocator-aware containers and basic_regex. I have patches adding
those guide too, but am still working on the tests (some cases I
expected to  work are ill-formed, so I'm still looking into why).

	* include/bits/shared_ptr.h (shared_ptr, weak_ptr): Add deduction
	guides for C++17.
	* include/bits/std_function.h (function): Likewise.
	* include/bits/stl_pair.h (pair): Likewise.
	* include/debug/array (__gnu_debug::array): Likewise.
	* include/std/array (array): Likewise.
	* include/std/functional (make_default_searcher)
	(make_boyer_moore_searcher, make_boyer_moore_horspool_searcher):
	Remove generator functions.
	* include/std/tuple (tuple): Add deduction guides.
	* include/std/valarray (valarray): Likewise.
	* testsuite/20_util/function_objects/searchers.cc: Adjust to use
	class template argument deduction instead of generator functions.
	* testsuite/20_util/function/cons/deduction.cc: New test.
	* testsuite/20_util/optional/cons/deduction_guide.cc: Rename to ...
	* testsuite/20_util/optional/cons/deduction.cc: ... here.
	* testsuite/20_util/pair/cons/deduction.cc: New test.
	* testsuite/20_util/shared_ptr/cons/deduction.cc: New test.
	* testsuite/20_util/tuple/cons/deduction.cc: New test.
	* testsuite/20_util/tuple/element_access/get_neg.cc: Adjust dg-error.
	* testsuite/20_util/unique_ptr/cons/deduction_neg.cc: New test.
	* testsuite/20_util/weak_ptr/cons/deduction.cc: New test.
	* testsuite/23_containers/array/cons/deduction.cc: New test.
	* testsuite/23_containers/array/cons/deduction_neg.cc: New test.
	* testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
	Adjust dg-error.
	* testsuite/23_containers/array/tuple_interface/get_neg.cc: Likewise.
	* testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc:
	Likewise.
	* testsuite/26_numerics/valarray/deduction.cc: New test.
	* testsuite/30_threads/lock_guard/cons/deduction.cc: New test.
	* testsuite/30_threads/scoped_lock/cons/deduction.cc: New test.
	* testsuite/30_threads/unique_lock/cons/deduction.cc: New test.

Tested powerpc64le-linux, comitted to trunk.

Attachment: patch.txt
Description: Text document