88 lines
3.0 KiB
C
88 lines
3.0 KiB
C
|
#ifndef DISTRIBUTION_SERVICE_BASIC_H
|
||
|
|
#define DISTRIBUTION_SERVICE_BASIC_H
|
||
|
|
|
||
|
|
#include "string"
|
||
|
|
|
||
|
|
|
||
|
|
namespace CTL
|
||
|
|
{
|
||
|
|
template<typename T>
|
||
|
|
struct is_char_ptr {
|
||
|
|
static const bool value = false;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<>
|
||
|
|
struct is_char_ptr<const char*> { static const bool value = true; };
|
||
|
|
|
||
|
|
template<>
|
||
|
|
struct is_char_ptr<char*> { static const bool value = true; };
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
struct decay_type_simple {
|
||
|
|
typedef std::remove_cv_t<std::remove_reference_t<T>> type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
static typename std::enable_if<is_char_ptr<typename decay_type_simple<T>::type>::value, std::string>::type
|
||
|
|
convert_to_string(T&& value) {
|
||
|
|
return value ? value : "null";
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
static typename std::enable_if<std::is_same<typename decay_type_simple<T>::type, bool>::value, std::string>::type
|
||
|
|
convert_to_string(T&& value) {
|
||
|
|
return value ? "true" : "false";
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
static typename std::enable_if<std::is_integral<typename decay_type_simple<T>::type>::value &&
|
||
|
|
!std::is_same<typename decay_type_simple<T>::type, bool>::value, std::string>::type
|
||
|
|
convert_to_string(T&& value) {
|
||
|
|
return std::to_string(static_cast<long long>(value));
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
static typename std::enable_if<std::is_floating_point<typename decay_type_simple<T>::type>::value, std::string>::type
|
||
|
|
convert_to_string(T&& value) {
|
||
|
|
return std::to_string(static_cast<long double>(value));
|
||
|
|
}
|
||
|
|
|
||
|
|
// 通用版本
|
||
|
|
template<typename T>
|
||
|
|
static typename std::enable_if<!is_char_ptr<typename decay_type_simple<T>::type>::value &&
|
||
|
|
!std::is_same<typename decay_type_simple<T>::type, bool>::value &&
|
||
|
|
!std::is_integral<typename decay_type_simple<T>::type>::value &&
|
||
|
|
!std::is_floating_point<typename decay_type_simple<T>::type>::value, std::string>::type
|
||
|
|
convert_to_string(T&& value) {
|
||
|
|
std::stringstream ss;
|
||
|
|
ss << value;
|
||
|
|
return ss.str();
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
static void format_one_arg(std::string& result, T&& value) {
|
||
|
|
size_t pos = result.find("{}");
|
||
|
|
if (pos != std::string::npos) {
|
||
|
|
std::string replacement = convert_to_string(std::forward<T>(value));
|
||
|
|
result.replace(pos, 2, replacement);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
static std::string format_braces_template(std::string fmt_str) {
|
||
|
|
return fmt_str;
|
||
|
|
}
|
||
|
|
template<typename T, typename... Rest>
|
||
|
|
static std::string format_braces_template(std::string fmt_str, T&& first, Rest&&... rest) {
|
||
|
|
format_one_arg(fmt_str, std::forward<T>(first));
|
||
|
|
if (sizeof...(rest) > 0) {
|
||
|
|
return format_braces_template(fmt_str, std::forward<Rest>(rest)...);
|
||
|
|
}
|
||
|
|
return fmt_str;
|
||
|
|
}
|
||
|
|
template<typename T>
|
||
|
|
static std::string format_braces_template(std::string fmt_str, T&& first) {
|
||
|
|
format_one_arg(fmt_str, std::forward<T>(first));
|
||
|
|
return fmt_str;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|