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constexpr colorize #81
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Owner
Author
|
clang でのみ通る。要調査 |
Collaborator
|
たのしそう |
Owner
Author
|
GCC は #include <algorithm>
#include <array>
#include <string_view>
#include <cstddef>
template <std::size_t N>
struct fixed_string {
std::array<char, N + 1> data{};
constexpr fixed_string() noexcept = default;
constexpr fixed_string(const char (&str)[N + 1]) noexcept { std::ranges::copy(str, data.begin()); }
constexpr std::string_view get() const noexcept { return {data.begin(), N}; }
};
template <std::size_t N>
fixed_string(const char (&)[N]) -> fixed_string<N - 1>;
template <fixed_string S>
struct static_string {
static constexpr auto len = S.get().find(',');
};
inline constexpr auto x [[maybe_unused]] = static_string<"foo,bar">::len;
int main() {} |
Owner
Author
|
ミニマルなコードを書くたびに頭を抱える |
Collaborator
|
たのしそう |
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attempt to make colorizer constexpr and transform string in constexpr via fixed_string