[−][src]Trait cotton::prelude::Boolinator

pub trait Boolinator {
    fn as_option(self) -> Option<()>;

    fn as_some<T>(self, some: T) -> Option<T>;

    fn as_some_from<T, F>(self, some: F) -> Option<T>
    where
        F: FnOnce() -> T;

    fn and_option<T>(self, opt: Option<T>) -> Option<T>;

    fn and_option_from<T, F>(self, opt: F) -> Option<T>
    where
        F: FnOnce() -> Option<T>;

    fn as_result<T, E>(self, ok: T, err: E) -> Result<T, E>;

    fn as_result_from<T, E, F, G>(self, ok: F, err: G) -> Result<T, E>
    where
        F: FnOnce() -> T,
        G: FnOnce() -> E;

    fn ok_or<E>(self, err: E) -> Result<(), E>;

    fn ok_or_else<E, G>(self, err: G) -> Result<(), E>
    where
        G: FnOnce() -> E;

    fn expect(self, msg: &str);
}

This trait defines a number of combinator-style methods for use with bool values.

In general, true/false map to Some(_)/None and Ok(_)/Err(_) respectively.

Required methods

fn as_option(self) -> Option<()>

If this value is true, returns Some(()); None otherwise.

fn as_some<T>(self, some: T) -> Option<T>

If this value is true, returns Some(some); None otherwise.

fn as_some_from<T, F>(self, some: F) -> Option<T> where
    F: FnOnce() -> T, 

If this value is true, returns Some(some()); None otherwise.

fn and_option<T>(self, opt: Option<T>) -> Option<T>

If this value is true, returns opt; None otherwise.

fn and_option_from<T, F>(self, opt: F) -> Option<T> where
    F: FnOnce() -> Option<T>, 

If this value is true, returns opt(); None otherwise.

fn as_result<T, E>(self, ok: T, err: E) -> Result<T, E>

If this value is true, returns Ok(ok); Err(err) otherwise.

fn as_result_from<T, E, F, G>(self, ok: F, err: G) -> Result<T, E> where
    F: FnOnce() -> T,
    G: FnOnce() -> E, 

If this value is true, returns Ok(ok()); Err(err()) otherwise.

fn ok_or<E>(self, err: E) -> Result<(), E>

If this value is true, returns Ok(()); Err(err) otherwise.

fn ok_or_else<E, G>(self, err: G) -> Result<(), E> where
    G: FnOnce() -> E, 

If this value is true, returns Ok(()); Err(err()) otherwise.

fn expect(self, msg: &str)

If this value is true, panics with msg; does nothing otherwise.

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Implementations on Foreign Types

impl Boolinator for bool[src]

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Implementors

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