File: alias-decl-52.C

package info (click to toggle)
gcc-arm-none-eabi 15%3A12.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 959,712 kB
  • sloc: cpp: 3,275,382; ansic: 2,061,766; ada: 840,956; f90: 208,513; makefile: 76,132; asm: 73,433; xml: 50,448; exp: 34,146; sh: 32,436; objc: 15,637; fortran: 14,012; python: 11,991; pascal: 6,787; awk: 4,779; perl: 3,054; yacc: 338; ml: 285; lex: 201; haskell: 122
file content (24 lines) | stat: -rw-r--r-- 604 bytes parent folder | download | duplicates (10) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
// PR c++/67021
// { dg-do compile { target c++11 } }

template<typename> struct Dummy;
template<> struct Dummy<int> {};

template <class...>
struct all_same { static constexpr bool value = true; };
template <class T, class...Rest>
struct all_same<T, T, Rest...> : all_same<T, Rest...> {};
template <class T, class U, class...Rest>
struct all_same<T, U, Rest...> { static constexpr bool value = false; };

template <class R>
using ValueType = int;

template <class I>
constexpr bool A(I i) {
  return all_same<ValueType<I>, ValueType<decltype(i++)>>::value;
}

int main() {
  static_assert(A(42), "");
}