common.h

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#pragma once
 
#include <parcel/json.h>
 
#include <commons/display_info.hpp>
#include <commons/fixed_string.hpp>
#include <commons/types.hpp>
 
#include <algorithm>
#include <array>
#include <cstddef>
#include <cstdint>
#include <string>
#include <string_view>
 
namespace parcel {
 
#if defined(COMMONS_HAS_INT128)
using comms::u128;
 
using comms::i128;
#endif
 
using comms::FixedString;
 
using DisplayInfo = comms::DisplayInfo;
 
template <std::string_view const&... Parts>
struct id_join {
    static constexpr std::size_t total_size = (Parts.size() + ... + 0);
    static constexpr auto buf = [] {
        std::array<char, total_size> r{};
        std::size_t off = 0;
        ((std::ranges::copy(Parts, r.begin() + off), off += Parts.size()), ...);
        return r;
    }();
    static constexpr std::string_view value{buf.data(), buf.size()};
};
 
template <std::string_view const&... Parts>
inline constexpr std::string_view id_join_v = id_join<Parts...>::value;
 
template <FixedString... Parts>
struct id_join_lit {
    static constexpr std::size_t total_size = (Parts.view().size() + ... + 0);
    static constexpr auto buf = [] {
        std::array<char, total_size> r{};
        std::size_t off = 0;
        ((std::ranges::copy(Parts.view(), r.begin() + off), off += Parts.view().size()), ...);
        return r;
    }();
    static constexpr std::string_view value{buf.data(), buf.size()};
};
 
template <FixedString... Parts>
inline constexpr std::string_view id_join_lit_v = id_join_lit<Parts...>::value;
 
template <FixedString Prefix, std::string_view const& Tail>
struct prefixed_id {
    static constexpr std::size_t total_size = Prefix.view().size() + Tail.size();
    static constexpr auto buf = [] {
        std::array<char, total_size> r{};
        std::ranges::copy(Prefix.view(), r.begin());
        std::ranges::copy(Tail, r.begin() + Prefix.view().size());
        return r;
    }();
    static constexpr std::string_view value{buf.data(), buf.size()};
};
 
template <FixedString Prefix, std::string_view const& Tail>
inline constexpr std::string_view prefixed_id_v = prefixed_id<Prefix, Tail>::value;
 
}  // namespace parcel