xieite::strlen()

Defined in header <xieite/ctnr/strlen.hpp>

A constexpr (and slightly more general) replacement for std::strlen().


Declaration

 #0 
template<typename Ch>
[[nodiscard]] constexpr std::size_t strlen(std::basic_string_view<Ch> strv) noexcept;

#1 
template<typename Ch>
[[nodiscard]] constexpr std::size_t strlen(const std::basic_string<Ch>& str) noexcept;

#2 
template<xieite::is_ch Ch, std::size_t n>
[[nodiscard]] constexpr std::size_t strlen(const xieite::group<Ch[n]>&) noexcept;
Returns n - 1. The compiler should prefer this overload for string literals.

#3 
template<typename Str>
requires(xieite::is_ptr<Str> && xieite::is_ch<std::remove_pointer_t<Str>>)
[[nodiscard]] constexpr std::size_t strlen(Str str) noexcept;
Invokes undefined behavior if the passed string is not null-terminated.

#4 
template<xieite::is_ch Ch>
[[nodiscard]] constexpr std::size_t strlen(Ch) noexcept;
Always returns 1.


Example

 
int main() {
	xieite::dump(xieite::strlen("abcdef"));
}
Output: 
6
[View in Compiler Explorer]