[][src]Trait alga::general::SupersetOf

pub trait SupersetOf<T>: Sized {
    fn is_in_subset(&self) -> bool;
unsafe fn to_subset_unchecked(&self) -> T;
fn from_subset(element: &T) -> Self; fn to_subset(&self) -> Option<T> { ... } }

Nested sets and conversions between them. Useful to work with substructures. It is preferable to implement the SupersetOf trait instead of SubsetOf whenever possible (because SupersetOf is automatically implemented whenever SubsetOf is.

The notion of "nested sets" is very broad and applies to what the types are supposed to represent, independently from their actual implementation details and limitations. For example:

In other words, implementation details due to machine limitations are ignored (otherwise we could not even, e.g., convert a u64 to an i64). If considering those limitations are important, other crates allowing you to query the limitations of given types should be used.

Required methods

fn is_in_subset(&self) -> bool

Checks if self is actually part of its subset T (and can be converted to it).

unsafe fn to_subset_unchecked(&self) -> T

Use with care! Same as self.to_subset but without any property checks. Always succeeds.

fn from_subset(element: &T) -> Self

The inclusion map: converts self to the equivalent element of its superset.

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Provided methods

fn to_subset(&self) -> Option<T>

The inverse inclusion map: attempts to construct self from the equivalent element of its superset.

Must return None if element has no equivalent in Self.

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Implementors

impl<SS: SubsetOf<SP>, SP> SupersetOf<SS> for SP[src]

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