A regular compilation unit, containing toplevel type, value, or function definitions.

This is the most commonly used type of compilation unit, and the basic “container” for your declarations.


void run() {
    print("Hello, World!");

// end of example, start of next example

import ceylon.collection {

MyPlugin myPlugin = MyPlugin(); // only instance

shared void registerMyPlugin(SetMutator<Plugin> registry)
    => registry.put(myPlugin);

no subtypes hierarchy

CompilationUnit(Declaration[] declarations, Import[] imports = [])
  • declarations

    The declarations in this compilation unit.

    (This attribute is empty for non-regular compilation units.)

  • imports = []

    The imports of this compilation unit.

childrenshared actual <Import|Declaration>[] children

The child nodes of this node.

Refines AnyCompilationUnit.children ultimately refines Node.children
declarationsshared actual Declaration[] declarations

The declarations in this compilation unit.

(This attribute is empty for non-regular compilation units.)

hashshared 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.

In general, hash values vary between platforms and between executions of the same program.

Note that when executing on a Java Virtual Machine, the 64-bit Integer value returned by an implementation of hash is truncated to a 32-bit integer value by removal of the 32 highest order bits, before returning the value to the caller.

Refines Object.hash
importsshared actual Import[] imports

The imports of this compilation unit.

moduleDescriptorshared actual Null moduleDescriptor

Regular compilation units contain no module descriptor.

packageDescriptorshared actual Null packageDescriptor

Regular compilation units contain no package descriptor.

Inherited Attributes
Attributes inherited from: AnyCompilationUnit
Attributes inherited from: Node
Attributes inherited from: Object
hash, string
copyshared CompilationUnit copy(Declaration[] declarations = ..., Import[] imports = ...)
  • declarations = this.declarations
  • imports = this.imports
equalsshared 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.

Note that an implementation of equals() that always returns false does satisfy the constraints given above. Therefore, in very rare cases where there is no reasonable definition of value equality for a class, for example, function references (Callable), it is acceptable for equals() to be defined to return false for every argument.

Refines Object.equals
transformshared 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.

visitshared actual void visit(Visitor visitor)

Visit this node with the given visitor. Calls the appropriate visitX method on the visitor.

Refines Node.visit
Inherited Methods
Methods inherited from: Node
Methods inherited from: Object