IifParser class
http://hl7.org/fhirpath/#iifcriterion-expression-true-result-collection-otherwise-result-collection-collection The iif function in FHIRPath is an immediate if, also known as a conditional operator (such as C’s ? : operator). The criterion expression is expected to evaluate to a Boolean. See: http://hl7.org/fhirpath/#singleton-evaluation-of-collections for rules of Boolean evaluation. Any collection with a single non-boolean item is true.
If criterion is true, the function returns the value of the true-result argument. If criterion is false or an empty collection, the function returns otherwise-result, unless the optional otherwise-result is not given, in which case the function returns an empty collection. Note that short-circuit behavior is expected in this function. In other words, true-result should only be evaluated if the criterion evaluates to true, and otherwise-result should only be evaluated otherwise. For implementations, this means delaying evaluation of the arguments.
- Inheritance
-
- Object
- FhirPathParser
- ValueParser<
ParserList> - FunctionParser
- IifParser
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- value ↔ ParserList
-
getter/setter pairoverride
Methods
-
execute(
List results, Map< String, dynamic> passed) → List -
The iterable, nested function that evaluates the entire FHIRPath
expression one object at a time
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
prettyPrint(
[int indent = 2]) → String -
Uses a rough approximation of reverse polish notation to render the
parsed value of a FHIRPath in a more human readable way than
verbosePrint, while still demonstrating how the expression was parsed
and nested according to this package
override
-
toString(
) → String -
A string representation of this object.
override
-
verbosePrint(
int indent) → String -
To print the entire parsed FHIRPath expression, this includes ALL
of the Parsers that are used in this package by the names used in
this package. These are not always synonymous with the FHIRPath
specification (although they usually are), and include some parser
classes that were created for ease of evaluation but are not included
at all as objects in the official spec. I'm generally going to recommend
that you use prettyPrint instead
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited