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add concat_to_string to utility for error messges

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ToruNiina
2018-12-02 23:05:15 +09:00
parent 8bf97d8a00
commit f83a8b450e
1 changed files with 24 additions and 1 deletions
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25
toml/utility.hpp
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@@ -3,6 +3,7 @@
#include "traits.hpp"
#include <utility>
#include <memory>
#include <sstream>
namespace toml
{
@@ -30,7 +31,7 @@ inline void resize_impl(T& container, std::size_t N, std::false_type)
else throw std::invalid_argument("not resizable type");
}
}
} // detail
template<typename T>
inline void resize(T& container, std::size_t N)
@@ -39,5 +40,27 @@ inline void resize(T& container, std::size_t N)
else return detail::resize_impl(container, N, detail::has_resize_method<T>());
}
namespace detail
{
inline std::string concat_to_string_impl(std::ostringstream& oss)
{
return oss.str();
}
template<typename T, typename ... Ts>
std::string concat_to_string_impl(std::ostringstream& oss, T&& head, Ts&& ... tail)
{
oss << std::forward<T>(head);
return concat_to_string_impl(oss, std::forward<Ts>(tail) ... );
}
} // detail
template<typename ... Ts>
std::string concat_to_string(Ts&& ... args)
{
std::ostringstream oss;
oss << std::boolalpha << std::fixed;
return detail::concat_to_string_impl(oss, std::forward<Ts>(args) ...);
}
}// toml
#endif // TOML11_UTILITY