An assertion statement, that is, an annotation list, followed by the keyword ‘assert’, a condition list, and terminated by a semicolon.

Examples:

assert (exists num = parseFloat(numText));
"Weight cannot be negative" assert (weight >= 0);

no subtypes hierarchy

Initializer
Assertion(Conditions conditions, Annotations annotations = ...)
Parameters:
  • conditions

    The conditions that are asserted.

  • annotations = Annotations()

    The annotations on the assertion.

    The doc annotation (typically as anonymous annotation) can be used to specify the message carried by the assertion failure.

Attributes
annotationsSource Codeshared Annotations annotations

The annotations on the assertion.

The doc annotation (typically as anonymous annotation) can be used to specify the message carried by the assertion failure.

childrenSource Codeshared actual [Annotations, Conditions] children

The child nodes of this node.

conditionsSource Codeshared Conditions conditions

The conditions that are asserted.

hashSource Codeshared actual Integer hash

The hash value of the value, which allows the value to be an element of a hash-based set or key of a hash-based map. Implementations must respect the constraint that:

  • if x==y then x.hash==y.hash.

Therefore, a class which refines equals must also refine hash.

Refines Object.hash
Inherited Attributes
Attributes inherited from: Node
Attributes inherited from: Object
Methods
copySource Codeshared Assertion copy(Conditions conditions = ..., Annotations annotations = ...)
Parameters:
  • conditions = this.conditions
  • annotations = this.annotations
equalsSource Codeshared actual Boolean equals(Object that)

Determine if two values are equal. Implementations should respect the constraints that:

  • if x===y then x==y (reflexivity),
  • if x==y then y==x (symmetry),
  • if x==y and y==z then x==z (transitivity).

Furthermore it is recommended that implementations ensure that if x==y then x and y have the same concrete class.

A class which explicitly refines equals() is said to support value equality, and the equality operator == is considered much more meaningful for such classes than for a class which simply inherits the default implementation of identity equality from Identifiable.

transformSource Codeshared actual Result transform<out Result>(Transformer<Result> transformer)

Transform this node with the given transformer by calling the appropriate transformX method on the transformer.

If you have a Node node that’s actually an LIdentifier instance, then the runtime will call LIdentifier.transform; therefore, this method is by nature narrowing. This means that if transformer is a NarrowingTransformer, calling node.transform(transformer) is equivalent to calling transformer.transformNode(node). On the other hand, if transformer is a WideningTransformer, then the two operations are very different.

Inherited Methods
Methods inherited from: Node