Crunch::Validator Concept Reference

Concept defining a value validator. More...

#include <crunch_validators.hpp>

Concept definition

template<typename V, typename T>
concept Crunch::Validator =  requires(T value, FieldId field_id) {
    { V::Check(value, field_id) } -> std::same_as<std::optional<Error>>;
}

Detailed Description

Concept defining a value validator.

Validators implement a static Check method that validates a value and returns std::nullopt on success or an Error on failure.