Trait array_map::Indexable[−][src]

pub unsafe trait Indexable {
    type Iter: Iterator<Item = Self>;

    const SIZE: usize;

    fn index(self) -> usize;

    fn iter() -> Self::Iter;
}
Expand description

Allows mapping from a type to an index

This trait is unsafe because there are a few other requirements that need to be met:

  • The indexes of self need to be contiguous and need to be returned in order from iter()
  • Iter needs to return exactly N items (this is checked in debug mode)

Associated Types

The type of Iterator that will be returned by Self::iter()

Associated Constants

The number of items or variants that this type can have.

Required methods

Maps self to usize to know which value in the underling array to use

Safety

This value can never be greater than Self::SIZE

All values in 0..SIZE must be returned by some variant of self.

An Iterator over all valid values of self

Safety

This iterator must yield exactly Self::SIZE items

Implementors