Returns the type of a variable, signal, port, entity instance or an expression. any typeof(any object);

Note that THDL++ supports type inference. If a declaration has an initializer, the auto keyword can be used instead of an explicit typeof.

A typical use case for typeof - declaring a signal that has the same type as some other signal:

entity Test
{
	port in logic[8] Input;
	signal typeof(Input) PrevInput;
}

typeof can also be used with expressions: signal typeof(Input cat Input) PrevInput; You can also declare "an instance of the same entity as the given instance":

entity Test
{
	Core.RAMs.Synchronous.SimpleRAM RAM1(
		...
	);
	
	typeof(RAM1) RAM2(
		...
	);
}