Source code for hwtLib.examples.errors.unusedSubunit

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

from hwt.interfaces.std import Signal
from hwt.synthesizer.unit import Unit


class ExampleChild(Unit):
    def _declr(self):
        self.c = Signal()
        self.d = Signal()._m()

    def _impl(self):
        self.d(self.c)


class UnusedSubunit(Unit):
    def _declr(self):
        self.a = Signal()
        self.b = Signal()._m()

        self.child = ExampleChild()

    def _impl(self):
        # self.child left unconnected -> error
        self.b(self.a)


class UnusedSubunit2(Unit):
    def _declr(self):
        self.a = Signal()
        self.b = Signal()._m()

        self.child0 = ExampleChild()
        self.child1 = ExampleChild()
        self.child2 = ExampleChild()

    def _impl(self):
        # chain of children is left unconnected -> error
        self.b(self.a)

        self.child1.c(self.child0.d)
        self.child2.c(self.child1.d)


if __name__ == "__main__":
    from hwt.synthesizer.utils import to_rtl_str
    u = UnusedSubunit2()
    # hwt.serializer.exceptions.SerializerException
    print(to_rtl_str(u))