Module applicative

Applicative functor. Allows application of a function in an Applicative context to a value in an Applicative context.

Examples

use rust2fun::prelude::*;

fn validate_number(number: CreditCardNumber) -> Result<CreditCardNumber, Error> {
    unimplemented!("Validate credit card number")
}

fn validate_expiration(date: Date) -> Result<Date, Error> {
    unimplemented!("Validate credit card expiration date")
}

fn validate_cvv(cvv: Code) -> Result<Code, Error> {
    unimplemented!("Validate credit card cvv")
}

fn validate_credit_card(
    number: CreditCardNumber,
    expiration: Date,
    cvv: Code,
) -> Result<CreditCard, Error> {
    Result::pure(CreditCard::new)
        .ap3(validate_number(number),
             validate_expiration(expiration),
             validate_cvv(cvv))
}

Traits

Applicative

Applicative functor. This is a stronger version of Apply that has pure. See the module level documentation for more.