Module class 

Class descriptors.

Every heap object’s header word 0 points at a Class, whose first field is the GC vtable. Classes are created when a program loads and live forever. They are frozen: after register_class returns, nothing in a class changes, so any thread may read them freely.

Modules

ids

Structs

Builtins

Class

ClassSpec

Fields of a class under construction. register_class assigns the id and the GC vtable.

Enums

Capability

Which ownership state new instances start in, and how the type may cross threads.

ObjKind

Physical layout of a class’s instances.

Statics

BUILTINS

Functions

class_by_id

class_count

class_id_of

Class id of a value; bigints report the Int class id.

class_of

Returns the class of any value, including immediates.

heap_class^⚠

The class of a heap object.

immediate_class

register_class

Registers a class, making it immutable and globally visible. Returns its 'static descriptor.

set_methods

Replaces a class’s method table (builtin classes get their methods when the prelude loads). The previous table is leaked, so concurrent readers stay valid.