mirror of
https://github.com/geode-sdk/geode.git
synced 2024-11-27 09:55:34 -05:00
58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
|
#pragma once
|
||
|
|
|
||
|
|
#include <array>
|
||
|
|
#include <string_view>
|
||
|
|
|
||
|
|
using namespace std::string_view_literals;
|
||
|
|
|
||
|
|
namespace geode::utils {
|
||
|
|
static constexpr const std::string_view sv_null = "\0";
|
||
|
|
static constexpr const std::string_view sv_none = "";
|
||
|
|
static constexpr const std::string_view sv_path = "/";
|
||
|
|
|
||
|
|
// straight off https://stackoverflow.com/questions/38955940/how-to-concatenate-static-strings-at-compile-time
|
||
|
|
template <std::string_view const& Separator, std::string_view const&... Strs>
|
||
|
|
struct ConstStringJoin {
|
||
|
|
static constexpr auto impl() noexcept {
|
||
|
|
constexpr std::size_t len = (Strs.size() + ... + 0) + (sizeof...(Strs) - 1) * Separator.size();
|
||
|
|
std::array<char, len + 1> arr{};
|
||
|
|
auto append = [len, i = 0, &arr](auto const& s) mutable {
|
||
|
|
for (auto c : s) arr[i++] = c;
|
||
|
|
if (i < static_cast<int>(len - 1)) {
|
||
|
|
for (auto c : Separator) arr[i++] = c;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
(append(Strs), ...);
|
||
|
|
arr[len] = 0;
|
||
|
|
return arr;
|
||
|
|
}
|
||
|
|
static constexpr auto arr = impl();
|
||
|
|
static constexpr std::string_view value {arr.data(), arr.size() - 1};
|
||
|
|
};
|
||
|
|
template <std::string_view const& Separator, std::string_view const&... Strs>
|
||
|
|
static constexpr auto const_join_sep = ConstStringJoin<Separator, Strs...>::value;
|
||
|
|
|
||
|
|
template <std::string_view const&... Strs>
|
||
|
|
static constexpr auto const_join = ConstStringJoin<sv_none, Strs...>::value;
|
||
|
|
|
||
|
|
template <std::string_view const&... Strs>
|
||
|
|
static constexpr auto const_join_path = ConstStringJoin<
|
||
|
|
sv_path, Strs...
|
||
|
|
>::value;
|
||
|
|
|
||
|
|
template <std::string_view const& Separator, std::string_view const&... Strs>
|
||
|
|
static constexpr const char* const_join_sep_c_str = ConstStringJoin<
|
||
|
|
Separator, Strs...
|
||
|
|
>::value.data();
|
||
|
|
|
||
|
|
template <std::string_view const&... Strs>
|
||
|
|
static constexpr const char* const_join_c_str = ConstStringJoin<
|
||
|
|
sv_none, Strs...
|
||
|
|
>::value.data();
|
||
|
|
|
||
|
|
template <std::string_view const&... Strs>
|
||
|
|
static constexpr const char* const_join_path_c_str = ConstStringJoin<
|
||
|
|
sv_path, Strs...
|
||
|
|
>::value.data();
|
||
|
|
}
|