Function vectorcall_bound_method

crates/vm/src/builtins/function.rs:1432–1446

Vectorcall implementation for PyBoundMethod (PEP 590).

(
    zelf_obj: &PyObject,
    mut args: Vec<PyObjectRef>,
    nargs: usize,
    kwnames: Option<&[PyObjectRef]>,
    vm: &VirtualMachine,
)

/// Vectorcall implementation for PyBoundMethod (PEP 590).
fn vectorcall_bound_method(
    zelf_obj: &PyObject,
    mut args: Vec<PyObjectRef>,
    nargs: usize,
    kwnames: Option<&[PyObjectRef]>,
    vm: &VirtualMachine,
) -> PyResult {
    let zelf: &Py<PyBoundMethod> = zelf_obj.downcast_ref().unwrap();

    // Insert self at front of existing Vec (avoids 2nd allocation).
    // O(n) memmove is cheaper than a 2nd heap alloc+dealloc for typical arg counts.
    args.insert(0, zelf.object.clone());
    let new_nargs = nargs + 1;
    zelf.function.vectorcall(args, new_nargs, kwnames, vm)
}

pub fn init(context: &'static Context) {
    PyFunction::extend_class(context, context.types.function_type);