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[clang-tidy] add reproducer for PR39949 into test-suite

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Summary:
The underlying issue is fixed in https://reviews.llvm.org/D56444
and this test ensures the issue does not creep back into our
code-base.

Reviewers: alexfh, aaron.ballman, hokein, hwright

Reviewed By: aaron.ballman

Subscribers: xazax.hun, cfe-commits

Differential Revision: https://reviews.llvm.org/D56918

llvm-svn: 351569
This commit is contained in:
Jonas Toth 2019-01-18 18:03:11 +00:00
parent d08d90ce51
commit ae17ff0781
1 changed files with 33 additions and 0 deletions
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33
clang-tools-extra/test/clang-tidy/abseil-upgrade-duration-conversions.cpp
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@ -430,3 +430,36 @@ void factoryInMacros() {
factoryTemplateAndMacro<ConvertibleTo<int>>();
TemplateFactoryInMacro(ConvertibleTo<int>());
}
// This is a reduced test-case for PR39949 and manifested in this check.
namespace std {
template <typename _Tp>
_Tp declval();
template <typename _Functor, typename... _ArgTypes>
struct __res {
template <typename... _Args>
static decltype(declval<_Functor>()(_Args()...)) _S_test(int);
template <typename...>
static void _S_test(...);
typedef decltype(_S_test<_ArgTypes...>(0)) type;
};
template <typename>
struct function;
template <typename... _ArgTypes>
struct function<void(_ArgTypes...)> {
template <typename _Functor,
typename = typename __res<_Functor, _ArgTypes...>::type>
function(_Functor) {}
};
} // namespace std
typedef std::function<void(void)> F;
F foo() {
return F([] {});
}