SequenceProtocolBuilder[T]

struct SequenceProtocolBuilder[self_type: ImplicitlyDestructible]

Installs CPython sequence protocol slots on a PythonTypeBuilder.

Construct directly from a PythonTypeBuilder. All methods return Self for chaining.

Each def_* method has three overloads unless noted: pointer+raising, pointer+non-raising, and value+raising. def_setitem additionally has a mut+raising overload (value-receiver omitted — mutations on a copy don't persist).

def_len()

Installs sq_length — called by len(obj).

See: PySequenceMethods.sq_length

Overload	Handler signature
Pointer / raising	fn(self: UnsafePointer[T, MutAnyOrigin]) raises -> Int
Pointer / non-raising	fn(self: UnsafePointer[T, MutAnyOrigin]) -> Int
Value / raising	fn(self: T) raises -> Int

def_getitem()

Installs sq_item — called by obj[i] (integer index).

See: PySequenceMethods.sq_item

Overload	Handler signature
Pointer / raising	fn(self: UnsafePointer[T, MutAnyOrigin], index: Int) raises -> PythonObject
Pointer / non-raising	fn(self: UnsafePointer[T, MutAnyOrigin], index: Int) -> PythonObject
Value / raising	fn(self: T, index: Int) raises -> PythonObject

def_setitem()

Installs sq_ass_item — called by obj[i] = val or del obj[i].

value is Variant[PythonObject, Int](Int(0)) for deletion and Variant[PythonObject, Int](val) for assignment.

See: PySequenceMethods.sq_ass_item

Overload	Handler signature
Pointer / raising	fn(self: UnsafePointer[T, MutAnyOrigin], index: Int, value: Variant[PythonObject, Int]) raises -> None
Mut / raising	fn(mut self: T, index: Int, value: Variant[PythonObject, Int]) raises -> None

def_contains()

Installs sq_contains — called by item in obj.

See: PySequenceMethods.sq_contains

Overload	Handler signature
Pointer / raising	fn(self: UnsafePointer[T, MutAnyOrigin], item: PythonObject) raises -> Bool
Pointer / non-raising	fn(self: UnsafePointer[T, MutAnyOrigin], item: PythonObject) -> Bool
Value / raising	fn(self: T, item: PythonObject) raises -> Bool

def_concat()

Installs sq_concat — called by obj + other.

See: PySequenceMethods.sq_concat

Overload	Handler signature
Pointer / raising	fn(self: UnsafePointer[T, MutAnyOrigin], other: PythonObject) raises -> PythonObject
Pointer / non-raising	fn(self: UnsafePointer[T, MutAnyOrigin], other: PythonObject) -> PythonObject
Value / raising	fn(self: T, other: PythonObject) raises -> PythonObject

def_repeat()

Installs sq_repeat — called by obj * n.

See: PySequenceMethods.sq_repeat

Overload	Handler signature
Pointer / raising	fn(self: UnsafePointer[T, MutAnyOrigin], count: Int) raises -> PythonObject
Pointer / non-raising	fn(self: UnsafePointer[T, MutAnyOrigin], count: Int) -> PythonObject
Value / raising	fn(self: T, count: Int) raises -> PythonObject

def_iconcat()

Installs sq_inplace_concat — called by obj += other.

See: PySequenceMethods.sq_inplace_concat

Overload	Handler signature
Pointer / raising	fn(self: UnsafePointer[T, MutAnyOrigin], other: PythonObject) raises -> PythonObject
Pointer / non-raising	fn(self: UnsafePointer[T, MutAnyOrigin], other: PythonObject) -> PythonObject
Value / raising	fn(self: T, other: PythonObject) raises -> PythonObject

def_irepeat()

Installs sq_inplace_repeat — called by obj *= n.

See: PySequenceMethods.sq_inplace_repeat

Overload	Handler signature
Pointer / raising	fn(self: UnsafePointer[T, MutAnyOrigin], count: Int) raises -> PythonObject
Pointer / non-raising	fn(self: UnsafePointer[T, MutAnyOrigin], count: Int) -> PythonObject
Value / raising	fn(self: T, count: Int) raises -> PythonObject