Function main

example/string/searchable.cpp:14–21

int main() {
    BOOST_HANA_CONSTANT_CHECK(hana::char_c<'c'> ^hana::in^ BOOST_HANA_STRING("abcde"));
    BOOST_HANA_CONSTANT_CHECK(!(hana::char_c<'z'> ^hana::in^ BOOST_HANA_STRING("abcde")));

    BOOST_HANA_CONSTANT_CHECK(
        hana::find(BOOST_HANA_STRING("abcxefg"), hana::char_c<'x'>) == hana::just(hana::char_c<'x'>)
    );
}