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Add test for variant construction with duplicate types. 

llvm-svn: 366032
This commit is contained in:
Eric Fiselier 2019-07-14 20:59:51 +00:00
parent 951bb68ce2
commit 3c0e2bb0cb
1 changed files with 12 additions and 0 deletions
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12
libcxx/test/std/utilities/variant/variant.variant/variant.ctor/T.pass.cpp
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@ -189,10 +189,22 @@ void test_no_narrowing_check_for_class_types() {
assert(std::get<0>(v) == 42);
}
struct Bar {};
struct Baz {};
void test_construction_with_repeated_types() {
using V = std::variant<int, Bar, Baz, int, Baz, int, int>;
static_assert(!std::is_constructible<V, int>::value, "");
static_assert(!std::is_constructible<V, Baz>::value, "");
// OK, the selected type appears only once and so it shouldn't
// be affected by the duplicate types.
static_assert(std::is_constructible<V, Bar>::value, "");
}
int main(int, char**) {
test_T_ctor_basic();
test_T_ctor_noexcept();
test_T_ctor_sfinae();
test_no_narrowing_check_for_class_types();
test_construction_with_repeated_types();
return 0;
}