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Implement const_str_t<> helper

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This commit is contained in:
Nekotekina 2021-05-12 18:41:54 +03:00
parent 8ae727ca04
commit f0ad20a250
2 changed files with 78 additions and 4 deletions
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74
rpcs3/util/types.hpp
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@ -670,6 +670,80 @@ constexpr unsigned __builtin_COLUMN()
}
#endif
template <usz Size = usz(-1)>
struct const_str_t
{
static constexpr usz size = Size;
char8_t chars[Size + 1]{};
constexpr const_str_t(const char(&a)[Size + 1])
{
for (usz i = 0; i <= Size; i++)
chars[i] = a[i];
}
constexpr const_str_t(const char8_t(&a)[Size + 1])
{
for (usz i = 0; i <= Size; i++)
chars[i] = a[i];
}
operator const char*() const
{
return reinterpret_cast<const char*>(chars);
}
constexpr operator const char8_t*() const
{
return chars;
}
};
template <>
struct const_str_t<usz(-1)>
{
const usz size;
const union
{
const char8_t* chars;
const char* chars2;
};
template <usz N>
constexpr const_str_t(const char8_t(&a)[N])
: size(N - 1)
, chars(+a)
{
}
template <usz N>
constexpr const_str_t(const char(&a)[N])
: size(N - 1)
, chars2(+a)
{
}
operator const char*() const
{
return std::launder(chars2);
}
constexpr operator const char8_t*() const
{
return chars;
}
};
template <usz Size>
const_str_t(const char(&a)[Size]) -> const_str_t<Size - 1>;
template <usz Size>
const_str_t(const char8_t(&a)[Size]) -> const_str_t<Size - 1>;
using const_str = const_str_t<>;
struct src_loc
{
u32 line;