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#pragma once
#include "pre_config.hpp"
#include <string>
#include <string_view>
namespace cru::util {
namespace details {
template <typename T>
struct TypeTag {};
constexpr std::wstring_view PlaceHolder(TypeTag<std::wstring>) {
return std::wstring_view(L"{}");
}
constexpr std::string_view PlaceHolder(TypeTag<std::string>) {
return std::string_view("{}");
}
template <typename TString>
void FormatInternal(TString& string) {
const auto find_result = string.find(PlaceHolder(TypeTag<TString>{}));
if (find_result != TString::npos)
throw std::invalid_argument("There is more placeholders than args.");
}
template <typename TString, typename T, typename... TRest>
void FormatInternal(TString& string, const T& arg, const TRest&... args) {
const auto find_result = string.find(PlaceHolder(TypeTag<TString>{}));
if (find_result == TString::npos)
throw std::invalid_argument("There is less placeholders than args.");
string.replace(find_result, 2, FormatToString(arg, TypeTag<TString>{}));
FormatInternal<TString>(string, args...);
}
} // namespace details
template <typename... T>
std::wstring Format(const std::wstring_view& format, const T&... args) {
std::wstring result(format);
details::FormatInternal<std::wstring>(result, args...);
return result;
}
template <typename... T>
std::string Format(const std::string_view& format, const T&... args) {
std::string result(format);
details::FormatInternal<std::string>(result, args...);
return result;
}
#define CRU_FORMAT_NUMBER(type) \
inline std::string FormatToString(const type number, \
details::TypeTag<std::string>) { \
return std::to_string(number); \
} \
inline std::wstring FormatToString(const type number, \
details::TypeTag<std::wstring>) { \
return std::to_wstring(number); \
}
CRU_FORMAT_NUMBER(int)
CRU_FORMAT_NUMBER(short)
CRU_FORMAT_NUMBER(long)
CRU_FORMAT_NUMBER(long long)
CRU_FORMAT_NUMBER(unsigned int)
CRU_FORMAT_NUMBER(unsigned short)
CRU_FORMAT_NUMBER(unsigned long)
CRU_FORMAT_NUMBER(unsigned long long)
CRU_FORMAT_NUMBER(float)
CRU_FORMAT_NUMBER(double)
#undef CRU_FORMAT_NUMBER
inline std::wstring_view FormatToString(const std::wstring& string,
details::TypeTag<std::wstring>) {
return string;
}
inline std::string_view FormatToString(const std::string& string,
details::TypeTag<std::string>) {
return string;
}
inline std::wstring_view FormatToString(const std::wstring_view& string,
details::TypeTag<std::wstring>) {
return string;
}
inline std::string_view FormatToString(const std::string_view& string,
details::TypeTag<std::string>) {
return string;
}
inline std::wstring_view FormatToString(const wchar_t* string,
details::TypeTag<std::wstring>) {
return std::wstring_view(string);
}
inline std::string_view FormatToString(const char* string,
details::TypeTag<std::string>) {
return std::string_view(string);
}
} // namespace cru::util
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