Singleton System provides access to a few useful system settings and values.

Interface CanAdd<T> specifies that a class can be added to an object of type T, producing a T.

Interface CanCreate specifies that a class has a default create() method, one with no arguments.

Interface CanEqual<T> specifies that a class can be tested for equality with an object of type T, producing a boolean which is true if the objects are identical.

Interface CanIndex<K,V> specifies that a class can return a value associated with a particular key.

Interface CanIndexStore<K,V> specifies that a class can store a value in a location associated with a particular key.

Interface CanIterate<T> specifies that a class can produce an Iterator<T> which can iterate over objects of type T.

Interface CanModulus<T> specifies that a class can be divided by an object of type T, producing a remainder of T.

Interface CanNegate<T> specifies that a class can be negated, producing an object of type T.

Interface CanSubtract<T> specifies that a class can be subtracted by an object of type T, producing a T.

Interface Integer<T> specifies methods that any fixed-size integer representation of a number should have.

Interface IteratorNullable<T> allows each item in a collection to be visited.

Class AddressMap maps old object addresses to new object addresses.

Class ArrayNullable<T> is used to house the methods for nullable array objects.

BigInteger objects are immutable representations of arbitrarily large positive and negative integers.

Enum is the parent type of all enums.

Class Message is the wrapper of each message passed between threads.

MethodTable pointers are used to hold pointers to method tables.

Class Object is the parent class of all classes in Shadow.

Class Thread provides ways to manipulate threads.

Class boolean contains the methods that can be called on boolean values.

Class code contains the methods that can be called on code values.

Class float contains the methods that can be called on float values.

Class long contains the methods that can be called on long values.

Class ubyte contains the methods that can be called on ubyte values.

Class ulong contains the methods that can be called on ulong values.

Exception AssertException is thrown when an assert fails.

Exception EmptyMailboxException is thrown when Mailbox's dequeue method is called in a non-blocking call, while being empty.

Exception FullMailboxException is thrown when the Mailbox's enqueue method is called in a non-blocking call, with the backing array being full.

Exception IncompatibleMessageTypeException is thrown when a thread requests a message type but another incompatible type is found.

Exception IndexOutOfBoundsException is thrown when an attempt is made to create an interface at run time.

Exception OutOfMemoryException is thrown when the run time system attempts to allocate memory on the heap and fails because the heap space allotted to the program is exhausted.

Exception UnsupportedOperationException should be thrown when a method is called that is never intended to be called.