Struct Context 

pub struct Context {
    pub last_error: Option<ProjError>,
    pub tmerc_algo: TmercAlgo,
    /* private fields */
}

A lightweight transformation context.

Holds the last error encountered, the transverse-Mercator algorithm preference, and an in-memory registry of raw grid file bytes indexed by name.

Fields

last_error: Option<ProjError>

The most recent error recorded on this context, if any.

tmerc_algo: TmercAlgo

Preferred transverse-Mercator algorithm.

Implementations

impl Context

pub fn new() -> Context

Create a fresh context with no error, TmercAlgo::Auto, and an empty grid registry.

pub fn register_grid(&mut self, name: impl Into<String>, data: Vec<u8>)

Register raw grid bytes under name.

Subsequent calls to get_grid(name) (via GridRegistry) will return a reference to these bytes. Calling this twice with the same name replaces the previous data.

Trait Implementations

impl Clone for Context

fn clone(&self) -> Context

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Context

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

Formats the value using the given formatter.

impl Default for Context

fn default() -> Self

Returns the “default value” for a type.

impl GridRegistry for Context

fn get_grid(&self, name: &str) -> Option<&[u8]>

Return the raw bytes of a named grid, or None if not registered.