Struct GenericContainer

#[repr(transparent)]
pub struct GenericContainer<T: ?Sized, C: ?Sized> {
    pub _marker: PhantomData<T>,
    pub container: C,
}

A wrapper type intended for use in blanket implementations of YourTrait ranging over containers C that hold a T: YourTrait.

This is necessary to avoid conflicting trait implementations.

Examples

Not needed when the T: YourTrait is fixed:

use generic_container::Container;

trait Trait {
    fn do_thing(&self);
}

impl<C: ?Sized + Container<dyn Trait>> Trait for C {
    fn do_thing(&self) {
        self.get_ref().do_thing();
    }
}

But when the inner type varies:

use generic_container::{Container, GenericContainer};

trait Trait {
    fn do_thing(&self);
}

impl<T: ?Sized + Trait, C: ?Sized + Container<T>> Trait for GenericContainer<T, C> {
    fn do_thing(&self) {
        self.container.get_ref().do_thing();
    }
}

Without a wrapper type, it does not compile:

use generic_container::{Container, GenericContainer};

trait Trait {
    fn do_thing(&self);
}

impl<T: ?Sized + Trait, C: ?Sized + Container<T>> Trait for C {
    fn do_thing(&self) {
        self.get_ref().do_thing();
    }
}

Fields

_marker: PhantomData<T>

Distinguish which type is supposed to be contained.

container: C

Should implement the base container trait, FragileTryContainer<T>.

Implementations

impl<T: ?Sized, C> GenericContainer<T, C>

pub const fn new(container: C) -> Self

Create a new GenericContainer struct wrapping the provided value, treated as a container around a specific type.

Trait Implementations

impl<T: ?Sized, C: Clone> Clone for GenericContainer<T, C>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T, C> Debug for GenericContainer<T, C>

where T: ?Sized, C: ?Sized + Debug,

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

Formats the value using the given formatter.

impl<T: ?Sized, C: Default> Default for GenericContainer<T, C>

fn default() -> Self

Returns the “default value” for a type.

impl<T: ?Sized, C: ?Sized + Hash> Hash for GenericContainer<T, C>

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<T: ?Sized, C: ?Sized + Ord> Ord for GenericContainer<T, C>

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<T: ?Sized, C: ?Sized + PartialEq<C>> PartialEq for GenericContainer<T, C>

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<T: ?Sized, C: ?Sized + PartialOrd<C>> PartialOrd for GenericContainer<T, C>

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: &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<T: ?Sized, C: Copy> Copy for GenericContainer<T, C>

impl<T: ?Sized, C: ?Sized + Eq> Eq for GenericContainer<T, C>