Template:cpp/standard library/hardened functions

	- all overloads have hardened preconditions
	- some overloads have hardened preconditions

Category		Sequence containers						Container views		Range utilities	Iterator adaptors		String (view) classes		General utilities			Stacktrace	Smart pointers	Numeric arrays
Class		array	vector	inplace_vector	deque	list	forward_list	span	mdspan	view_interface	common_iterator	counted_iterator	basic_string	basic_string_view	bitset	optional	expected	basic_stacktrace	shared_ptr	valarray
Creation	constructor							span	mdspan		common_iterator	counted_iterator
	static helper																	current
Elementaccess	operator*										operator*	operator*				operator*	operator*
	operator->										operator->					operator->	operator->
	operator[]	operator[]	operator[]	operator[]	operator[]			operator[]	operator[]			operator[]	operator[]	operator[]	operator[]			operator[]	operator[]	operator[]
	front	front	front	front	front	front	front	front		front			front	front
	back	back	back	back	back	back		back		back			back	back
	error																error
Subviews	first							first
	last							last
	subspan							subspan
Modifiers	operator=										operator=
	operator+=											operator+=
	operator-=											operator-=
	operator++										operator++	operator++
	pop_front				pop_front	pop_front	pop_front
	pop_back		pop_back	pop_back	pop_back	pop_back							pop_back
	remove_prefix													remove_prefix
	remove_suffix													remove_suffix
Non-member	operator==										operator==
	operator-										operator-
	iter_move										iter_move	iter_move
	iter_swap										iter_swap	iter_swap