[#161B6524717B6AA0F6506A418C65FD54B80E28AD]
Constructor
constexpr ignore_case_param(ignore_case_t) noexcept;
Construction from ignore_case indicates that comparisons should be case-insensitive.
When ignore_case is passed as an argument, this function ignores case when performing comparisons:
void f( ignore_case_param = {} );