Struct TypedValue

pub struct TypedValue<P: Property> { /* private fields */ }

Value object with constraints by Property trait.

Implementations

impl<P: Property> TypedValue<P>

pub fn new(value: P::Value) -> Result<Self, P::Error>

Method to instantiate a TypedValue.

Examples

use typed_value::*;

struct MaximumLengthProperty<T, const N:usize>(T);

impl<T: AsRef<str>, const N:usize> Property for MaximumLengthProperty<T, N> {
    type Value = T;
    type Error = String;

    fn validate(value: &Self::Value) -> Result<(), Self::Error> {
        if value.as_ref().chars().count() <= N {
            Ok(())
        } else {
            Err(format!("length of \"{}\" is over {}.", value.as_ref(), N))
        }
    }
}

type MaximumLengthString<const N:usize> = TypedValue<MaximumLengthProperty<String, N>>;

assert!(MaximumLengthString::<5>::new("foobar".to_owned()).is_err());

Trait Implementations

impl<P: Property<Value = V>, V: Clone> Clone for TypedValue<P>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<P: Property<Value = V>, V: Debug> Debug for TypedValue<P>

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

Formats the value using the given formatter.

impl<P: Property> Deref for TypedValue<P>

type Target = <P as Property>::Value

The resulting type after dereferencing.

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

Dereferences the value.

impl<P: Property<Value = V>, V: Display> Display for TypedValue<P>

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

Formats the value using the given formatter.

impl<P: Property<Value = V>, V: Hash> Hash for TypedValue<P>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<P: Property<Value = V>, V: Ord> Ord for TypedValue<P>

fn cmp(&self, other: &Self) -> 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<P: Property<Value = V>, V: PartialEq> PartialEq for TypedValue<P>

fn eq(&self, other: &Self) -> 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<P: Property<Value = V>, V: PartialOrd> PartialOrd for TypedValue<P>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

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

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

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

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

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

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

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

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

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

impl<P: Property<Value = V>, V: Copy> Copy for TypedValue<P>

impl<P: Property<Value = V>, V: Eq> Eq for TypedValue<P>