Trait Param

pub trait Param {
    type Output;

    // Required methods
    fn name(&self) -> &str;
    fn default(&self) -> Option<Self::Output>;
    fn extract(&self, raw: &str) -> Option<Self::Output>;
    fn serialize(&self, value: Self::Output) -> Option<String>;
}

A type that transforms hash function parameters to and from the raw, serialized version.

Required Associated Types

type Output

The type of this parameter.

Required Methods

fn name(&self) -> &str

The parameter’s name.

fn default(&self) -> Option<Self::Output>

The default value for the parameter if it isn’t included, or None if the parameter is required.

fn extract(&self, raw: &str) -> Option<Self::Output>

Extract the parameter’s value from a serialized string, returning the value or None if parsing failed.

fn serialize(&self, value: Self::Output) -> Option<String>

Serialize a value to a string.

Implementors

impl<'a, T> Param for GenParam<'a, T>

where T: Clone + Display + FromStr + PartialEq,

type Output = T