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Reduce minimum standard from 23 to 20

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sha512sum 2024-02-22 19:41:35 +00:00
parent 8fdeb354a3
commit 5bbe94f279
2 changed files with 28 additions and 13 deletions
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2
CMakeLists.txt
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@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.27)
project(utempl)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
find_package(fmt REQUIRED)
set(CMAKE_CXX_STANDART 23)
set(CMAKE_CXX_STANDART 20)
add_library(utempl INTERFACE)
target_link_libraries(utempl INTERFACE fmt::fmt-header-only)
target_include_directories(utempl INTERFACE include)

39
include/utempl/menu.hpp
View file

@ -6,6 +6,22 @@
#include <fmt/format.h>
#include <fmt/compile.h>
namespace utempl::utils {
template <std::size_t>
struct ConstexprString;
};
template <std::size_t Size>
struct fmt::formatter<utempl::utils::ConstexprString<Size>> : public fmt::formatter<std::string_view> {
constexpr auto parse(format_parse_context& ctx) const {
return ctx.begin();
};
inline constexpr auto format(const utempl::utils::ConstexprString<Size>& str, auto& ctx) const {
return fmt::formatter<std::string_view>::format({str.data.begin()}, ctx);
};
};
namespace utempl {
namespace utils {
@ -26,12 +42,9 @@ struct ConstexprString {
inline constexpr auto size() const {
return Size == 0 ? 0 : Size - 1;
};
inline constexpr operator std::string_view() const {
inline constexpr explicit operator std::string_view() const {
return {this->data.begin()};
};
inline constexpr operator std::string() const {
return static_cast<std::string>(static_cast<std::string_view>(*this));
};
inline constexpr bool operator==(std::string_view other) const {
return static_cast<std::string_view>(*this) == other;
};
@ -296,15 +309,17 @@ inline auto Run(Menu&& menu) {
constexpr auto messagesCount = utils::kTupleSize<std::remove_cv_t<decltype(Cleared::kMessages)>>;
[&]<auto... Is, auto messages = Cleared::kMessages>(std::index_sequence<Is...>){
constexpr auto message = ([&]<auto I>(utils::Wrapper<I>){
static constexpr auto message = get<I>(messages);
constexpr auto message = get<I>(messages);
constexpr std::size_t s = maxSize - (message.need ? message.need->size() : utils::countDigits(I));
static constexpr auto str = utils::createStringWith<s>(' ');
constexpr std::string_view str1{[&] {
static constexpr auto st = utils::toString<I>();
return message.need ? std::string_view(*message.need) : std::string_view(st);
}()}
,str2{message.message}
,str3{str};
constexpr auto str3 = utils::createStringWith<s>(' ');
constexpr auto str2 = message.message;
constexpr auto str1 = [&] {
if constexpr(message.need) {
return *message.need;
} else {
return utils::toString<I>();
};
}();
// + 1 - NULL Terminator
constexpr auto size = fmt::formatted_size(FMT_COMPILE(fmt.data.begin())
,str1