An if/else conditional.

The conditional begins with an if clause (ifClause) and may then optionally be followed by a chain of if/else clauses, optionally terminated by an else clause.

Examples (multi-line):

if (exists p = paragraphs.first) {
    setupAnchor(p);
    paragraphs.collect(output);
} else if (exists div) {
    visit(div.paragraphs);
} else {
    outputEmpty();
}

if (text.size >= terminalWidth) {
    print(text);
} else if (text.size >= remainingWidth) {
    wrap();
    print(text);
    remainingWidth = terminalWidth - text.size;
} else {
    print(text);
    remainingWidth -= text.size;
}

no subtypes hierarchy

Initializer
IfElse(IfClause ifClause, ElseClause? elseClause)
Parameters:
  • ifClause

    The if clause.

  • elseClause

    The else clause, if present.

Attributes
childrenSource Codeshared actual [IfClause, ElseClause=] children

The child nodes of this node.

elseClauseSource Codeshared ElseClause? elseClause

The else clause, if present.

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
ifClauseSource Codeshared IfClause ifClause

The if clause.

Inherited Attributes
Attributes inherited from: Node
Attributes inherited from: Object
Methods
copySource Codeshared IfElse copy(IfClause ifClause = ..., ElseClause? elseClause = ...)
Parameters:
  • ifClause = this.ifClause
  • elseClause = this.elseClause
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