Enum slyce::Index

pub enum Index {
    Head(usize),
    Tail(usize),
    Default,
}

A position inside an array.

Tail indices are represented with a distinct enumeration variant so that the full index numeric range (usize) can be utilized without numeric overflows.

Variants

Head(usize)

Position in the array relative to the start of the array (i.e. absolute position).

Tail(usize)

Position in the array relative to the end of the array.

Default

Either the first or the last element of the array, depending on the sign of step.

Trait Implementations

impl Clone for Index

fn clone(&self) -> Index

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Index

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

Formats the value using the given formatter.

impl Default for Index

fn default() -> Self

Returns the "default value" for a type.

impl Eq for Index

impl<U> From<Option<U>> for Index where
    U: Into<Index>, 

fn from(i: Option<U>) -> Self

Performs the conversion.

impl From<i32> for Index

fn from(i: i32) -> Self

Performs the conversion.

impl From<isize> for Index

fn from(i: isize) -> Self

Performs the conversion.

impl From<usize> for Index

fn from(i: usize) -> Self

Performs the conversion.

impl PartialEq<Index> for Index

fn eq(&self, other: &Index) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Index) -> bool

This method tests for !=.

impl StructuralEq for Index

impl StructuralPartialEq for Index