Skip to content

Non-recursive variant of detail::length() for compilers with maximum recursion depth in compile-time constexpr evaluation. #29

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jan 25, 2020
Merged

Non-recursive variant of detail::length() for compilers with maximum recursion depth in compile-time constexpr evaluation. #29

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 18 additions & 0 deletions include/nonstd/string_view.hpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -409,6 +409,22 @@ namespace nonstd { namespace sv_lite {

namespace detail {

#if nssv_CPP14_OR_GREATER

template< typename CharT >
inline constexpr std::size_t length( CharT * s, std::size_t result = 0 )
{
CharT * v = s;
std::size_t r = result;
while ( *v != '\0' ) {
++v;
++r;
}
return r;
}

#else // nssv_CPP14_OR_GREATER

// Expect tail call optimization to make length() non-recursive:

template< typename CharT >
Expand All @@ -417,6 +433,8 @@ inline constexpr std::size_t length( CharT * s, std::size_t result = 0 )
return *s == '\0' ? result : length( s + 1, result + 1 );
}

#endif // nssv_CPP14_OR_GREATER

} // namespace detail

#endif // nssv_CPP11_OR_GREATER
Expand Down