Mercurial > hg > CbC > CbC_gcc
comparison gcc/testsuite/g++.dg/cpp2a/class-deduction-alias2.C @ 145:1830386684a0
gcc-9.2.0
| author | anatofuz |
|---|---|
| date | Thu, 13 Feb 2020 11:34:05 +0900 |
| parents | |
| children |
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| 131:84e7813d76e9 | 145:1830386684a0 |
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| 1 // Test that a non-template deduction guide that doesn't match the alias is | |
| 2 // ignored. | |
| 3 // { dg-do compile { target c++2a } } | |
| 4 | |
| 5 template <class T> struct identity { using type = T; }; | |
| 6 template <class T> using identity_t = typename identity<T>::type; | |
| 7 | |
| 8 template <class T, class U> struct C { | |
| 9 C(T, U); // #1 | |
| 10 }; | |
| 11 | |
| 12 C(char*, char*) -> C<int,int>; // #3 | |
| 13 | |
| 14 template<class V> | |
| 15 using A = C<V *, V *>; | |
| 16 | |
| 17 char c; | |
| 18 A a4 (&c, &c); // ignores #3 because C<int,int> is not an A<V> | |
| 19 | |
| 20 static_assert (__is_same_as(decltype(a4),A<char>)); | |
| 21 | |
| 22 C c2 (&c, &c); // { dg-error "conversion" } deduces with #3 |