KOS_OP_CALL_VAR_ATTR_STAR

• Style: EXTRA. Schema: VAR (name cpool index for obj), CONST (attr name), COUNT (opa bitflags: 1 = has *args, 2 = has **kwargs), NOARG.

• Stack: Same semantics as KOS_OP_CALL_ATTR_STAR, but obj is not on the stack; it is read from the frame namespace by name. Stack layout per opa (bottom … TOS): opa=0 → []; opa=1 → [pos]; opa=2 → [kwd]; opa=3 → [pos, kwd] with kwd at TOS (same relative order as CALL_ATTR_STAR without the receiver). Pop order and opa handling match KOS_OP_CALL_VAR_STAR combined with CALL_ATTR_STAR; obj.name resolves as CALL_ATTR describes, obj is prepended to the positional tuple when the attribute is an unbound function, and the callee is called with the tuple and the keywords.

• Invariants: var_name and attr name in constant pool; same opa bit meanings as CALL_ATTR_STAR.

• See also: KOS_OP_CALL_VAR_ATTR for the receiver read by name.

• Compiler form: Not emitted by the compiler; available for manual bytecode construction.