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BLI: provide a default hash for enums

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This avoids some boilerplate code that was necessary when using enums
as keys in maps or sets.
This commit is contained in:
Jacques Lucke
2021-03-17 11:37:46 +01:00
parent e00a47ffd6
commit ac60e64745
3 changed files with 30 additions and 11 deletions
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22
source/blender/blenlib/tests/BLI_map_test.cc
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@@ -565,6 +565,28 @@ TEST(map, AddOrModifyExceptions)
EXPECT_ANY_THROW({ map.add_or_modify(3, create_fn, modify_fn); });
}
namespace {
enum class TestEnum {
A = 0,
B = 1,
C = 2,
D = 1,
};
}
TEST(map, EnumKey)
{
Map<TestEnum, int> map;
map.add(TestEnum::A, 4);
map.add(TestEnum::B, 6);
EXPECT_EQ(map.lookup(TestEnum::A), 4);
EXPECT_EQ(map.lookup(TestEnum::B), 6);
EXPECT_EQ(map.lookup(TestEnum::D), 6);
EXPECT_FALSE(map.contains(TestEnum::C));
map.lookup(TestEnum::D) = 10;
EXPECT_EQ(map.lookup(TestEnum::B), 10);
}
/**
* Set this to 1 to activate the benchmark. It is disabled by default, because it prints a lot.
*/