mysql::strconv::Is_parse_options_optional Concept Reference

True for any kind of parse options for which get_repeat() returns Repeat_optional, i.e., it is known at compile-time that a string of length 0 matches, and thus parse error is impossible. More...

#include <parse_options.h>

Concept definition

template<class Test>
concept mysql::strconv::Is_parse_options_optional =   
    Is_parse_options<Test> &&        
    requires(Test opt) {
      { get_repeat(opt) } -> std::same_as<Repeat_optional>;
    }

Detailed Description

True for any kind of parse options for which get_repeat() returns Repeat_optional, i.e., it is known at compile-time that a string of length 0 matches, and thus parse error is impossible.

Functions taking such an argument can may declared without [[nodiscard]] (if no other errors are possible either).