| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // This is a "No Compile Test" suite. |
| // http://dev.chromium.org/developers/testing/no-compile-tests |
| |
| #include "base/traits_bag.h" |
| |
| namespace base { |
| |
| enum class RequiredTrait { |
| A, |
| B, |
| C |
| }; |
| |
| struct NotAValidTrait {}; |
| |
| struct TestTraits { |
| // List of traits that are valid inputs for the constructor below. |
| struct ValidTrait { |
| ValidTrait(RequiredTrait); |
| }; |
| |
| template <class... ArgTypes, |
| class CheckArgumentsAreValid = std::enable_if_t< |
| trait_helpers::AreValidTraits<ValidTrait, ArgTypes...>::value>> |
| constexpr TestTraits(ArgTypes... args) |
| : required_trait(trait_helpers::GetEnum<RequiredTrait>(args...)) {} |
| |
| const RequiredTrait required_trait; |
| }; |
| |
| #if defined(NCTEST_TRAITS_BAG_REQUIRED_TRAIT_NOT_SET) // [r"The traits bag is missing a required trait."] |
| constexpr TestTraits traits = {}; |
| #elif defined(NCTEST_TRAITS_BAG_INVALID_TRAIT) // [r"no matching constructor for initialization of 'const base::TestTraits'"] |
| constexpr TestTraits traits = {RequiredTrait::A, NotAValidTrait{}}; |
| #endif |
| |
| } // namespace base |