dmd/compiler/test/compilable/deprecated_override.d

// https://issues.dlang.org/show_bug.cgi?id=22668
// REQUIRED_ARGS: -verrors=simple
// Overrides with same deprecated'ness are allowed

class SameParent
{
    deprecated void foo() {}
    void foo(int) {}

    void bar(int) {}
    deprecated void bar() {}
}

class SameChild : SameParent
{
    deprecated override void foo() {}
    override void foo(int) {}

    override void bar(int) {}
    deprecated override void bar() {}
}

/**
Only the parent declaration is deprecated

TEST_OUTPUT:
----
compilable/deprecated_override.d(44): Deprecation: `deprecated_override.IntroducingChild.foo` is overriding the deprecated method `deprecated_override.IntroducingParent.foo`
compilable/deprecated_override.d(48): Deprecation: `deprecated_override.IntroducingChild.bar` is overriding the deprecated method `deprecated_override.IntroducingParent.bar`
----
**/

class IntroducingParent
{
    deprecated void foo() {}
    void foo(int) {}

    void bar(int) {}
    deprecated void bar() {}
}

class IntroducingChild : IntroducingParent
{
    override void foo() {}
    override void foo(int) {}

    override void bar(int) {}
    override void bar() {}
}

// Unrelated to this path but should this error as well?

class IntroducingGrandchild : IntroducingChild
{
    override void foo() {}
    override void foo(int) {}

    override void bar(int) {}
    override void bar() {}
}

/**
Only the overriding declaration is deprecated

TEST_OUTPUT:
----
compilable/deprecated_override.d(83): Deprecation: `deprecated_override.OverrideChild.foo` cannot be marked as `deprecated` because it is overriding a function in the base class
compilable/deprecated_override.d(87): Deprecation: `deprecated_override.OverrideChild.bar` cannot be marked as `deprecated` because it is overriding a function in the base class
----
**/

class OverrideParent
{
    void foo() {}
    void foo(int) {}

    void bar(int) {}
    void bar() {}
}

class OverrideChild : OverrideParent
{
    deprecated override void foo() {}
    override void foo(int) {}

    override void bar(int) {}
    deprecated override void bar() {}
}

class OverrideGrandChild : OverrideChild
{
    deprecated override void foo() {}
    override void foo(int) {}

    override void bar(int) {}
    deprecated override void bar() {}
}