stl_algo.h (__unguarded_partition_pivot, [...]): New.

stl_algo.h (__unguarded_partition_pivot, [...]): New.

2009-08-24  Chris Jefferson  <chris@bubblescope.net>

	* include/stl_algo.h (__unguarded_partition_pivot,
	__move_median_first): New.
	(__insertion_sort, __unguarded_insertion_sort): Adjust for move-only
	types.
	(__unguarded_linear_insert): Assume always inserting value at __last.
	(__unguarded_partition): Take pivot by reference.
	(__introsort_loop, __introselect) : Use __unguarded_partition_pivot.
	* testsuite/25_algorithms/nth_element/moveable.cc : Enable.

From-SVN: r151055