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[cplusplus] Test hashing shared_ptr / unique_ptr

This commit is contained in:
Behdad Esfahbod 2022-06-03 02:10:06 -06:00
parent 51ca1c9b59
commit 7aacdd05bd
1 changed files with 12 additions and 0 deletions
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12
test/api/test-cplusplus.cc
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@ -62,6 +62,7 @@
#include "hb-cplusplus.hh" #include "hb-cplusplus.hh"
#include <cassert> #include <cassert>
#include <functional>
#include <utility> #include <utility>
int int
@ -108,5 +109,16 @@ main ()
hb::unique_ptr<hb_buffer_t> pb5 {pb3.reference ()}; hb::unique_ptr<hb_buffer_t> pb5 {pb3.reference ()};
/* Test that shared_ptr / unique_ptr are std::hash'able, and that they
* return the same hash (which is the underlying pointer's hash. */
std::hash<hb_buffer_t *> hash {};
std::hash<hb::shared_ptr<hb_buffer_t>> hash2 {};
std::hash<hb::unique_ptr<hb_buffer_t>> hash3 {};
assert (hash (b) == hash2 (pb4));
assert (hash2 (pb4) == hash2 (pb2));
assert (hash (b) == hash3 (pb5));
return pb == pb.get_empty () || pb == pb2; return pb == pb.get_empty () || pb == pb2;
} }