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Introduce contains_value()

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* split enum_traits index

* add more proper way to check if enum contains certain value

* change description of contains_value() and add it in readme
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oficsu 2020-03-13 12:12:01 +03:00 • committed by GitHub
parent 1e6c9a5a5a
commit aa24461613
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3 changed files with 47 additions and 4 deletions
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test/test.cpp
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@ -176,6 +176,38 @@ TEST_CASE("enum_index") {
REQUIRE_FALSE(enum_index(static_cast<number>(0)).has_value());
}
TEST_CASE("contains_value") {
REQUIRE(contains_value<Color>(-12));
REQUIRE(contains_value<Color>(7));
REQUIRE(contains_value<Color>(15));
REQUIRE_FALSE(contains_value<Color>(42));
REQUIRE_FALSE(contains_value<Color>(-120));
REQUIRE_FALSE(contains_value<Color>(0));
constexpr auto no = enum_integer(Numbers::one);
REQUIRE(contains_value<Numbers>(no));
REQUIRE(contains_value<Numbers>(enum_integer(Numbers::two)));
REQUIRE(contains_value<Numbers>(enum_integer(Numbers::three)));
REQUIRE_FALSE(contains_value<Numbers>(enum_integer(Numbers::many)));
constexpr auto dr = enum_integer(Directions::Right);
REQUIRE(contains_value<Directions&>(dr));
REQUIRE(contains_value<Directions>(Directions::Down));
REQUIRE(contains_value<Directions>(Directions::Up));
REQUIRE_FALSE(contains_value<Directions>(static_cast<Directions>(0)));
constexpr auto nt = contains_value<number>(number::three);
REQUIRE(contains_value<number>(number::one));
REQUIRE(contains_value<number>(100));
REQUIRE(contains_value<number>(200));
REQUIRE(contains_value<number>(300));
REQUIRE(contains_value<number>(number::two));
REQUIRE(nt);
REQUIRE_FALSE(contains_value<number>(number::four));
REQUIRE_FALSE(contains_value<number>(111));
REQUIRE_FALSE(contains_value<number>(0));
}
TEST_CASE("enum_value") {
constexpr auto cr = enum_value<Color>(0);
REQUIRE(cr == Color::RED);