Struct Cond

pub struct Cond<E, F> { /* private fields */ }

Conditionally encodes an encodable.

Examples

use encode::Encodable;
use encode::combinators::Cond;
use std::ffi::CStr;

let non_empty = |s:&&CStr| !s.is_empty();

let mut buf = Vec::new();
Cond::new(c"hello", non_empty).encode(&mut buf).unwrap();
assert_eq!(&buf, b"hello\0", "A non-empty CStr includes the null terminator");

buf.clear();

Cond::new(c"", non_empty).encode(&mut buf).unwrap();
assert_eq!(&buf, b"", "An empty CStr does not produce any output");

Implementations

impl<E, F> Cond<E, F>

pub fn new(encodable: E, condition: F) -> Self

where F: Fn(&E) -> bool,

Creates a new Cond combinator.

pub fn into_inner(self) -> (E, F)

Consumes the Cond combinator and returns the inner value.

Trait Implementations

impl<E, F> AsRef<E> for Cond<E, F>

fn as_ref(&self) -> &E

Converts this type into a shared reference of the (usually inferred) input type.

impl<E, F> Borrow<E> for Cond<E, F>

fn borrow(&self) -> &E

Immutably borrows from an owned value.

impl<E: Clone, F: Clone> Clone for Cond<E, F>

fn clone(&self) -> Cond<E, F>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<E: Debug, F: Debug> Debug for Cond<E, F>

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

Formats the value using the given formatter.

impl<E, F> Deref for Cond<E, F>

type Target = E

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<Encodable, Encoder, F> Encodable<Encoder> for Cond<Encodable, F>

where Encodable: Encodable<Encoder>, Encoder: Encoder, F: Fn(&Encodable) -> bool,

type Error = <Encodable as Encodable<Encoder>>::Error

The error type that can be returned when encoding self.

fn encode(&self, encoder: &mut Encoder) -> Result<(), Self::Error>

Encodes self into the given encoder.

impl<E: Ord, F: Ord> Ord for Cond<E, F>

fn cmp(&self, other: &Cond<E, F>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<E: PartialEq, F: PartialEq> PartialEq for Cond<E, F>

fn eq(&self, other: &Cond<E, F>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<E: PartialOrd, F: PartialOrd> PartialOrd for Cond<E, F>

fn partial_cmp(&self, other: &Cond<E, F>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<E: Eq, F: Eq> Eq for Cond<E, F>

impl<E, F> StructuralPartialEq for Cond<E, F>