Struct WriterMonad 

pub struct WriterMonad<A: Clone> {
    pub value: A,
    pub log: Vec<String>,
}

Writer monad: Writer w a = (a, w) with Monoid w.

Fields

value: A

log: Vec<String>

Implementations

impl<A: Clone> WriterMonad<A>

pub fn new(value: A) -> Self

pub fn tell(self, msg: String) -> Self

pub fn listen(&self) -> (&A, &Vec<String>)

pub fn pass<F: Fn(&Vec<String>) -> Vec<String>>(self, f: F) -> Self

Trait Implementations

impl<A: Clone + Clone> Clone for WriterMonad<A>

fn clone(&self) -> WriterMonad<A>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<A: Debug + Clone> Debug for WriterMonad<A>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.