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constexpr, constructor delegation, integer_sequence, oh my! (hopefully fix MSVC build) (nw)

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This commit is contained in:
Vas Crabb 2019-11-21 20:56:04 +11:00
parent eaf07fffa3
commit 24c928786e
1 changed files with 7 additions and 8 deletions
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15
src/emu/input.h
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@ -24,6 +24,7 @@
#include <map> #include <map>
#include <memory> #include <memory>
#include <string> #include <string>
#include <utility>
//************************************************************************** //**************************************************************************
@ -433,14 +434,8 @@ class input_seq
{ {
public: public:
// construction/destruction // construction/destruction
constexpr input_seq() noexcept constexpr input_seq() noexcept : input_seq(std::make_index_sequence<std::tuple_size<decltype(m_code)>::value>()) { }
{ template <typename... T> constexpr input_seq(input_code code_0, T... code_n) noexcept : input_seq(std::make_index_sequence<std::tuple_size<decltype(m_code)>::value - sizeof...(T) - 1>(), code_0, code_n...) { }
reset();
}
template <typename... T> constexpr input_seq(input_code code_0, T... code_n) noexcept
{
set(code_0, code_n...);
}
constexpr input_seq(const input_seq &rhs) noexcept = default; constexpr input_seq(const input_seq &rhs) noexcept = default;
// operators // operators
@ -478,6 +473,10 @@ public:
static const input_seq empty_seq; static const input_seq empty_seq;
private: private:
static constexpr input_code get_end_code(size_t) noexcept { return end_code; }
template <typename... T, size_t... N> constexpr input_seq(std::integer_sequence<size_t, N...>, T... code) noexcept : m_code({ code..., get_end_code(N)... }) { }
template <unsigned N> void set() noexcept template <unsigned N> void set() noexcept
{ {
std::fill(std::next(m_code.begin(), N), m_code.end(), end_code); std::fill(std::next(m_code.begin(), N), m_code.end(), end_code);