30 lines
1.1 KiB
C++
30 lines
1.1 KiB
C++
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#include <cpp-utils/value_type/ValueType.h>
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#include <gtest/gtest.h>
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using cpputils::ValueType;
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class AllEnabledConfig final {
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using underlying_type = int;
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static constexpr bool allow_value_access() { return true; }
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};
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using AllEnabledValueType = ValueType<AllEnabledConfig>;
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template<class T, class Enable = void> struct has_value_access : std::false_type {};
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template<class T> struct has_value_access<T, std::void_t<T::value()>> : std::true_type {
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static_assert(std::is_same<typename T::underlying_type, std::result_of_t<T::value()>>::value, "value() method returns wrong type");
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};
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struct ConfigWithValueAccess final {
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using underlying_type = int;
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static constexpr bool allow_value_access() { return true; }
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};
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struct ConfigWithoutValueAccess final {
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using underlying_type = int;
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static constexpr bool allow_value_access() { return false; }
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};
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static_assert(has_value_access<ValueType<AllEnabledConfig>>::value, "");
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static_assert(has_value_access<ValueType<ConfigWithValueAccess>>::value, "");
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static_assert(!has_value_access<ValueType<ConfigWithoutValueAccess>>::value, "");
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