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Function std.experimental.allocator.building_blocks.free_tree.FreeTree.allocate
Allocates n bytes of memory. First consults the free tree, and returns
from it if a suitably sized block is found. Otherwise, the parent allocator
is tried. If allocation from the parent succeeds, the allocated block is
returned. Otherwise, the free tree tries an alternate strategy: If ParentAllocator defines deallocate, FreeTree releases all of its
contents and tries again.
void[] allocate
(
size_t n
);
TODO
Splitting and coalescing should be implemented if ParentAllocator does not defined deallocate.
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