Initializer
ExistsOperation(SpanningExpression operand)
Parameters:
  • operand

    The operand expression whose existence is tested.

Attributes
childrenSource Codeshared actual [SpanningExpression] children

The child nodes of this node.

Refines UnaryOperation.children ultimately refines Node.children
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
operandSource Codeshared actual SpanningExpression operand

The operand expression whose existence is tested.

operatorSource Codeshared actual String operator

The text of the operator.

prefixSource Codeshared actual Boolean prefix

true if this is a prefix unary operator expression (the Operation.operator occurs before the UnaryIshOperation.operand), false if it’s postfix.

Inherited Attributes
Attributes inherited from: Node
Attributes inherited from: Object
Attributes inherited from: UnaryIshOperation
Attributes inherited from: UnaryOperation
Methods
copySource Codeshared ExistsOperation copy(SpanningExpression operand = ...)
Parameters:
  • operand = this.operand
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