Struct Environment 

pub struct Environment<'a> { /* private fields */ }

What an evaluation runs with: the type model, the environment variables and the seams the caller supplies.

Implementations

impl<'a> Environment<'a>

pub fn new(model: &'a dyn Model) -> Self

An environment over model with no variables of its own and no seams.

pub fn with_variable( self, name: impl Into<String>, value: Collection<'a>, ) -> Self

Defines the environment variable %name (N1 §9), which takes precedence over a variable of the same name N1 or FHIR R4 define.

pub fn with_resolver(self, resolver: &'a dyn Resolver) -> Self

Supplies the seam resolve() calls.

pub fn with_terminology(self, terminology: &'a dyn Terminology) -> Self

Supplies the seam memberOf(), subsumes() and subsumedBy() call.

pub fn with_profiles(self, profiles: &'a dyn Profiles) -> Self

Supplies the seam conformsTo() calls.

pub fn with_definitions(self, definitions: &'a dyn Definitions) -> Self

Supplies the seam elementDefinition() and slice() call.

pub const fn with_now(self, now: Timestamp) -> Self

Fixes the instant now(), today() and timeOfDay() answer; without it they read the clock once per evaluation.

pub const fn with_strict_ordering(self) -> Self

Refuses an order-dependent operation on a collection whose order is undefined.

N1 §3.1 leaves the order of children() and descendants(), and of every collection derived from them, undefined, and lets an implementation return an error when first(), last(), tail(), skip(), take() or the indexer runs over such a collection. With this mode on, that is EvalError::Unordered; without it, those operations answer in the order the document holds.

pub const fn with_fhirpath_stu3_functions(self) -> Self

Admits the functions of STU3_FUNCTIONS, which FHIRPath 3.0.0 adds as Standard for Trial Use.

Without it the evaluator is FHIRPath N1 2.0.0, the release FHIR R4 cites (fhirpath.html §2.9), and a call to one of them is EvalError::UnknownFunction. Those this crate does not implement yet stay that error with the option on.

pub fn model(&self) -> &'a dyn Model

The type model.

Trait Implementations

impl Debug for Environment<'_>

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

Formats the value using the given formatter.