Struct geodesy::Minimal

pub struct Minimal { /* private fields */ }

A minimalistic context provider, supporting only built in and run-time defined operators. Usually sufficient for cartographic uses, and for internal test authoring.

Trait Implementations

impl Context for Minimal

fn get_grid(&self, _name: &str) -> Result<Arc<dyn Grid>, Error>

Access grid resources by identifier

fn new() -> Minimal

In general, implementations should make sure that new differs from default only by adding access to the builtin adaptors (geo:in, gis:out etc.)

fn op(&mut self, definition: &str) -> Result<OpHandle, Error>

Instantiate the operation given by definition

fn apply( &self, op: OpHandle, direction: Direction, operands: &mut dyn CoordinateSet ) -> Result<usize, Error>

Apply operation op to operands

fn globals(&self) -> BTreeMap<String, String>

Globally defined default values (typically just ellps=GRS80)

fn steps(&self, op: OpHandle) -> Result<&Vec<String>, Error>

Definitions of steps

fn params(&self, op: OpHandle, index: usize) -> Result<ParsedParameters, Error>

Parsed parameters of a specific step

fn register_op(&mut self, name: &str, constructor: OpConstructor)

Register a new user-defined operator

fn get_op(&self, name: &str) -> Result<OpConstructor, Error>

Helper for the Op instantiation logic in Op::op(...)

fn register_resource(&mut self, name: &str, definition: &str)

Register a new user-defined resource (macro, ellipsoid parameter set…)

fn get_resource(&self, name: &str) -> Result<String, Error>

Helper for the Op instantiation logic in Op::op(...)

fn get_blob(&self, name: &str) -> Result<Vec<u8>, Error>

Access blob-like resources by identifier

impl Debug for Minimal

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

Formats the value using the given formatter.

impl Default for Minimal

fn default() -> Minimal

Returns the “default value” for a type.