Struct handy_io::pattern::combinators::OrElse

pub struct OrElse<P, F>(_, _);

A pattern for the or_else combinator, chaining a pattern on the end of another pattern which evaluation fails with an error.

This pattern is created by calling Pattern::or_else method.

Methods

impl<P, F> OrElse<P, F>

fn unwrap(self) -> (P, F)

Trait Implementations

impl<R: Read, P0, P1, F> ReadFrom<R> for OrElse<P0, F> where
    P0: ReadFrom<R>,
    P1: ReadFrom<R, Value = P0::Value>,
    F: FnOnce(Error) -> P1, 

type Future = ReadOrElse<R, P0, P1, F>

The future to read a value of the pattern from R.

fn lossless_read_from(self, reader: R) -> Self::Future

Creates a future instance to read a value of the pattern from reader.

fn read_from(self, reader: R) -> LossyReadFrom<R, Self::Future>

Creates a future instance to read a value of the pattern from reader.

fn sync_read_from(self, reader: R) -> Result<Self::Value>

Scynchronously reading a value of the pattern from reader.

fn boxed(self) -> BoxReadFrom<R, Self::Value> where
    Self: Send + 'static,
    Self::Future: Send + 'static, 

Returns the boxed version of this pattern.

impl<W: Write, P0, P1, F> WriteTo<W> for OrElse<P0, F> where
    P0: WriteTo<W>,
    P1: WriteTo<W, Value = P0::Value>,
    F: FnOnce(Error) -> P1, 

type Future = WriteOrElse<W, P0, P1, F>

The future to write a value of the pattern to W.

fn lossless_write_to(self, writer: W) -> Self::Future

Creates a future instance to write a value of the pattern to writer.

fn write_to(self, writer: W) -> LossyWriteTo<W, Self::Future>

Creates a future instance to write a value of the pattern to writer.

fn sync_write_to(self, writer: W) -> Result<Self::Value>

Scynchronously writing a value of the pattern to writer.

fn boxed(self) -> BoxWriteTo<W, Self::Value> where
    Self: Send + 'static,
    Self::Future: Send + 'static, 

Returns the boxed version of this pattern.

impl<P: Debug, F: Debug> Debug for OrElse<P, F>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<P0, P1, F> Pattern for OrElse<P0, F> where
    P0: Pattern,
    P1: Pattern<Value = P0::Value>,
    F: FnOnce(Error) -> P1, 

type Value = P1::Value

The value type associated to the pattern.

fn then<F, P>(self, f: F) -> Then<Self, F> where
    F: FnOnce(Result<Self::Value>) -> P, 

Takes a closure which maps a Result<Self::Value> to a pattern, and creates a pattern which calls that closure on the evaluation result of self.

fn and_then<F, P>(self, f: F) -> AndThen<Self, F> where
    F: FnOnce(Self::Value) -> P, 

Takes a closure which maps a value to a pattern, and creates a pattern which calls that closure if the evaluation of self was succeeded.

fn or_else<F, P>(self, f: F) -> OrElse<Self, F> where
    F: FnOnce(Error) -> P, 

Takes a closure which maps an error to a pattern, and creates a pattern which calls that closure if the evaluation of self failed.

fn map<F, T>(self, f: F) -> Map<Self, F> where
    F: FnOnce(Self::Value) -> T, 

Takes a closure which maps a value to another value, and creates a pattern which calls that closure on the evaluated value of self.

fn chain<P>(self, other: P) -> Chain<Self, P> where
    P: Pattern, 

Takes two patterns and creates a new pattern over both in sequence.

fn repeat(self) -> Repeat<Self> where
    Self: Clone, 

Creates Repeat pattern to represent an infinite stream of this pattern.