According to http://en.cppreference.com/w/cpp/compiler_support
string_view is supported by gcc 7 and clang 4.0. As in NetBSD-current base we have gcc 6.4.0 and clang 5.0.1, I thought I would try it out: $ clang -std=c++17 -o foo foo.cpp foo.cpp:3:10: fatal error: 'string_view' file not found #include <string_view> ^~~~~~~~~~~~~ 1 error generated. Is the page over optimistic, or do I need more flags on my compile line? (Guessing that /usr/include has the gcc include files...) Cheers, Patrick