Module s4 

S4 OOP system — class registry, method dispatch, and object construction.

S4 is R’s formal object system. This module implements:

• Class definitions with slots, inheritance, and prototypes (setClass)
• Object construction with slot validation (new)
• Inheritance-aware type checking (is)
• Generic functions and method dispatch (setGeneric, setMethod)
• Slot access and modification (slot, slot<-)

Statics

__BUILTIN_REG_BUILTIN_REPRESENTATION 🔒

__BUILTIN_REG_BUILTIN_SLOT 🔒

__BUILTIN_REG_BUILTIN_SLOT_SET 🔒

__INTERP_REG_INTERP_EXISTS_METHOD 🔒

__INTERP_REG_INTERP_IS 🔒

__INTERP_REG_INTERP_IS_VIRTUAL_CLASS 🔒

__INTERP_REG_INTERP_NEW 🔒

__INTERP_REG_INTERP_SET_CLASS_S4 🔒

__INTERP_REG_INTERP_SET_GENERIC 🔒

__INTERP_REG_INTERP_SET_METHOD 🔒

__INTERP_REG_INTERP_SET_VALIDITY 🔒

__INTERP_REG_INTERP_SHOW_CLASS 🔒

__INTERP_REG_INTERP_VALID_OBJECT 🔒

Functions

all_prototypes_for_class 🔒

Collect all prototype defaults for a class including inherited prototypes.

all_slots_for_class 🔒

Collect all slot definitions for a class including inherited slots.

builtin_representation 🔒

Create a named character vector describing S4 slot types.

builtin_slot 🔒

Extract a slot from an S4 object.

builtin_slot_set 🔒

Set a slot on an S4 object (replacement function).

extract_character_vec 🔒

Extract a character vector from an RValue (for contains argument).

extract_prototype 🔒

Extract prototype values from a named list or named vector.

extract_slots 🔒

Extract slot definitions from a representation or slots argument. Accepts a named list (list(x = “numeric”, y = “character”)) or a named character vector (c(x = “numeric”, y = “character”)).

inheritance_chain 🔒

Collect the full inheritance chain for a class, including the class itself. Uses the S4 class registry to walk the contains hierarchy.

interp_exists_method 🔒

Check if a method exists for a given generic and signature.

interp_is 🔒

Check if an object is an instance of a class (S4-compatible).

interp_is_virtual_class 🔒

Check if a class is virtual.

interp_new 🔒

Create a new S4 object.

interp_set_class_s4 🔒

Define an S4 class.

interp_set_generic 🔒

Define an S4 generic function.

interp_set_method 🔒

Register an S4 method.

interp_set_validity 🔒

Set a validity method for an S4 class.

interp_show_class 🔒

Display information about an S4 class.

interp_valid_object 🔒

Validate an S4 object.