A ‘case
’ expression clause of a ‘switch
’ expression (SwitchCaseElseExpression
), that is,
optionally the keyword ‘else
’, then the keyword ‘case
’, followed by a case item enclosed in parentheses and an expression.
The expression is parsed with a precedence just below
the then
(ThenOperation
) and else
(ElseOperation
) operations,
to avoid ambiguity with these.
Alternatively, it may be an if
/then
/else
expression (IfElseExpression
)
or let
expression (LetExpression
).
Examples:
case (is Integer) val / 2 case ('$') 2 else case (is Integer) val.magnitude
Anything
Object
CaseExpression
Node
Object
Anything
no subtypes hierarchy
Initializer |
CaseExpression(CaseItem caseItem, DisjoiningExpression|IfElseExpression|LetExpression expression, Boolean elseCase = ...) Parameters:
|
Attributes | |
caseItem | Source Codeshared CaseItem caseItem The case item for this clause. |
children | Source Codeshared actual [CaseItem, DisjoiningExpression|IfElseExpression|LetExpression] children The child nodes of this node. Refines Node.children |
elseCase | Source Codeshared Boolean elseCase Whether this is a non-disjoint |
expression | Source Codeshared DisjoiningExpression|IfElseExpression|LetExpression expression The expression for this clause. |
hash | Source 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:
Therefore, a class which refines In general, Note that when executing on a Java Virtual Machine, the
64-bit Refines Object.hash |
Inherited Attributes |
Attributes inherited from: Node |
Attributes inherited from: Object hash , string |
Methods | |
copy | Source Codeshared CaseExpression copy(CaseItem caseItem = ..., DisjoiningExpression|IfElseExpression|LetExpression expression = ..., Boolean elseCase = ...) Parameters:
|
equals | Source Codeshared actual Boolean equals(Object that) Determine if two values are equal. For any two non-null objects x == y Implementations should respect the constraints that:
Furthermore it is recommended that implementations
ensure that if A class which explicitly refines Note that an implementation of Refines Object.equals |
transform | Source Codeshared actual Result transform<out Result>(Transformer<Result> transformer) Transform this node with the given If you have a Refines Node.transform |
visit | Source Codeshared actual void visit(Visitor visitor) Visit this node with the given Refines Node.visit |
Inherited Methods |
Methods inherited from: Node |
Methods inherited from: Object equals |