Trait ShouldBeArgs 

pub trait ShouldBeArgs<T> {
    type MessageT: Display;

    // Required method
    fn expected(&self) -> &T;

    // Provided method
    fn message(&self) -> Option<&Self::MessageT> { ... }
}

Required Associated Types

type MessageT: Display

Required Methods

fn expected(&self) -> &T

Provided Methods

fn message(&self) -> Option<&Self::MessageT>

Implementations on Foreign Types

impl<T> ShouldBeArgs<T> for &T

type MessageT = &'static str

fn expected(&self) -> &T

impl<T, MessageT> ShouldBeArgs<T> for (&T, MessageT)

where MessageT: Display,

type MessageT = MessageT

fn expected(&self) -> &T

fn message(&self) -> Option<&Self::MessageT>

impl<T, MessageT> ShouldBeArgs<T> for (T, MessageT)

where MessageT: Display,

type MessageT = MessageT

fn expected(&self) -> &T

fn message(&self) -> Option<&Self::MessageT>

Implementors

impl<T> ShouldBeArgs<T> for T

type MessageT = &'static str