Builtin Type Conversion

The return type of these special methods is invariant. Python will raise an error if some other (sub)type is returned. This is why these optype interfaces don't accept generic type arguments.

operator			operand
expression	function	type	method	type
`complex(_)`	`do_complex`	`DoesComplex`	`__complex__`	`CanComplex`
`float(_)`	`do_float`	`DoesFloat`	`__float__`	`CanFloat`
`int(_)`	`do_int`	`DoesInt`	`__int__`	`CanInt`
`bool(_)`	`do_bool`	`DoesBool`	`__bool__`	`CanBool[+R: bool = bool]`
`bytes(_)`	`do_bytes`	`DoesBytes`	`__bytes__`	`CanBytes`
`str(_)`	`do_str`	`DoesStr`	`__str__`	`CanStr`
`repr(_)`	`do_repr`	`DoesRepr`	`__repr__`	`CanRepr`
`format(_, x)`	`do_format`	`DoesFormat`	`__format__`	`CanFormat`
`hash(_)`	`do_hash`	`DoesHash`	`__hash__`	`CanHash`
`_.__index__()` (docs)	`do_index`	`DoesIndex`	`__index__`	`CanIndex`