Trait OptFields

pub trait OptFields:
    Sized
    + Default
    + Clone {
    // Required methods
    fn fields(&self) -> &[OptElem];
    fn parse(input: Split<'_, &str>) -> Self;
    fn new() -> Self;
}

Trait for OptFields

Required Methods

fn fields(&self) -> &[OptElem]

Return a slice over all optional fields. NB: This may be replaced by an iterator or something else in the future

fn parse(input: Split<'_, &str>) -> Self

Given an iterator over a split, each expected to hold one optional field (in the :: format), parse them as optional fields to create a collection.

fn new() -> Self

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl OptFields for ()

This implementation is useful for performance if we don’t actually need any optional fields. () takes up zero space, and all methods are no-ops.

fn fields(&self) -> &[OptElem]

fn parse(_input: Split<'_, &str>) -> Self

fn new() -> Self

impl OptFields for Vec<OptElem>

Stores all the optional fields in a vector.

fn fields(&self) -> &[OptElem]

fn parse(input: Split<'_, &str>) -> Self

fn new() -> Self

Implementors