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Use C++17 void_t

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C++17 has void_t and make_void, so gdbsupport/traits.h can be
simplified.

Approved-By: Pedro Alves <pedro@palves.net>
This commit is contained in:
Tom Tromey 2023-10-15 13:40:03 -06:00
parent cc87f13181
commit d02f31bb13
1 changed files with 1 additions and 10 deletions
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11
gdbsupport/traits.h
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@ -43,15 +43,6 @@
namespace gdb {
/* Pre C++14-safe (CWG 1558) version of C++17's std::void_t. See
<http://en.cppreference.com/w/cpp/types/void_t>. */
template<typename... Ts>
struct make_void { typedef void type; };
template<typename... Ts>
using void_t = typename make_void<Ts...>::type;
/* Implementation of the detection idiom:
- http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4502.pdf
@ -79,7 +70,7 @@ struct detector
/* Implementation of the detection idiom (positive case). */
template<typename Default, template<typename...> class Op, typename... Args>
struct detector<Default, void_t<Op<Args...>>, Op, Args...>
struct detector<Default, std::void_t<Op<Args...>>, Op, Args...>
{
using value_t = std::true_type;
using type = Op<Args...>;