2007-10-12  Paolo Carlini  <pcarlini@suse.de>

	* include/bits/stl_heap.h (__is_heap_until): Add.
	(__is_heap(_RandomAccessIterator, _Distance),
	__is_heap(_RandomAccessIterator, _Compare, _Distance)):
	Adjust, call the latter.
	(is_heap, is_heap_until): Add, call the above.
	* include/bits/algorithmfwd.h: Add.
	* testsuite/25_algorithms/is_heap/requirements/
	explicit_instantiation/2.cc: New.
	* testsuite/25_algorithms/is_heap/requirements/
	explicit_instantiation/pod.cc: Likewise.
	* testsuite/25_algorithms/is_heap/1.cc: Likewise.
	* testsuite/25_algorithms/is_heap_until/requirements/
	explicit_instantiation/2.cc: Likewise.
	* testsuite/25_algorithms/is_heap_until/requirements/
	explicit_instantiation/pod.cc: Likewise.
	* testsuite/25_algorithms/is_heap_until/1.cc: Likewise.
	* testsuite/25_algorithms/headers/algorithm/synopsis.cc:
	Add is_heap and is_heap_until.

From-SVN: r129266