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	* std/valarray_array.h (__valarray_get_memory,
	__valarray_get_storage, __valarray_release_storage): New
	functions.
	(_Array_default_ctor, _Array_init_ctor, _Array_copy_ctor,
	_Array_copier): New traits classes.
	(__valarray_default_construct): New function.  Implements valarray
	default construction.
	(__valarray_fill_construct): New function. Implements valarray
	construction with initializer.
	(__valarray_copy_construct): New function.  Implements valarray
	copy construction.
	(__valarray_destroy_elements): New function.
	(__valarray_copy, __valarray_fill): Tweak.
	(__valarray_sum, __valarray_product): New helper functions.
	(_Array<>::free_data): Remove.
	(_Array<>::_Array): Tweak.

	* std/std_valarray.h (valarray<>::product): Remove.
	(valarray<>::valarray): Use __valarray_get_storage.
	(valarray<>::shift, valarray<>::cshift, valarray<>::resize):
	Tweak.

	* std/cpp_type_traits.h: New file.

	* valarray.cc (multiplies<>, accumulate, valarray<>::product):
	Remove explicit instantiation.
	(__valarray_product): New function.
	(_Indexer::_Indexer): Use.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@35055 138bc75d-0d04-0410-961f-82ee72b054a4