A ‘case’ clause of a switch’ statement (SwitchCaseElse), that is, the keyword ‘case’, followed by a case item enclosed in parentheses and a block.

Examples (multi-line):

case (is String) {
    int = parseInteger(val);
}

case (null) { return; }

no subtypes hierarchy

Initializer
CaseClause(CaseItem caseItem, Block block)
Parameters:
  • caseItem

    The case item for this clause.

  • block

    The block for this clause.

    The block is entered if the case item matches the switch expression (SwitchClause.expression).

Attributes
blockSource Codeshared Block block

The block for this clause.

The block is entered if the case item matches the switch expression (SwitchClause.expression).

caseItemSource Codeshared CaseItem caseItem

The case item for this clause.

childrenSource Codeshared actual [CaseItem, Block] children

The child nodes of this node.

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 CaseClause copy(CaseItem caseItem = ..., Block block = ...)
Parameters:
  • caseItem = this.caseItem
  • block = this.block
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