simplify clone implementations

add tests for cxMapDifference() and cxMapListDifference()

add documentation for cxMapDifference() and cxMapListDifference()

default NULL allocator to cxDefaultAllocator

add implementations for map difference

make clone functions return int instead of size_t

add test coverage for allocation failures in clone-function

(0) -1000 -300 -100 -30 -10 -7 tip

mercurial