"error: function-like macro 'span_HAVE' is not defined" when std::span is available

[burnpanck]

On LLVM 10, I get the above error from "include/nonstd/span.hpp:1524:61":

#if span_CPP11_OR_GREATER && span_FEATURE( BYTE_SPAN ) && ( span_HAVE( BYTE ) || span_HAVE( NONSTD_BYTE ) )

It seem that, span_HAVE(...) is only defined when span_USES_STD_SPAN is false, but used outside of that configuration too.

[gracicot]

This also affect GCC11

[martinmoene]

Thanks for the heads-up.

This issue seems to be a duplicate of #55 and should have been closed already in April 2020 :)

span_HAVE() has been made available when using std::span in release 8.0 in issue #55 via bfee78b.