import t
from t import CInt


# ============================================================
# Cross-module isinstance test library: classes defined here are imported by
# main.vp to verify vtable comparison resolves across object files.
# ============================================================


@t.CVTable
class Shape:
    def area(self) -> CInt:
        return 0


@t.CVTable
class Circle(Shape):
    r: CInt

    def __init__(self, r: CInt):
        self.r = r

    def area(self) -> CInt:
        return self.r


@t.CVTable
class Square(Shape):
    s: CInt

    def __init__(self, s: CInt):
        self.s = s

    def area(self) -> CInt:
        return self.s


@t.NoVTable
class PlainShape:
    tag: CInt