Struct TransformerKey 

pub struct TransformerKey {
    pub src_epsg: u32,
    pub dst_epsg: u32,
}

Composite cache key identifying a (src_epsg, dst_epsg) transformer pair.

The struct is Copy + Eq + Hash so it can be used directly in a HashMap and trivially moved through the MRU queue.

Fields

src_epsg: u32

Source EPSG code (e.g. 4326 for WGS84).

dst_epsg: u32

Destination EPSG code (e.g. 3857 for Web Mercator).

Implementations

impl TransformerKey

pub fn new(src_epsg: u32, dst_epsg: u32) -> Self

Convenience constructor.

Trait Implementations

impl Clone for TransformerKey

fn clone(&self) -> TransformerKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TransformerKey

impl Debug for TransformerKey

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

Formats the value using the given formatter.

impl Eq for TransformerKey

impl Hash for TransformerKey

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 PartialEq for TransformerKey

fn eq(&self, other: &TransformerKey) -> 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 StructuralPartialEq for TransformerKey