How to detect implicit overriding

[Hamish Arblaster]

Hello, can someone please explain specifically how implicit overriding works and how I can get a list of direct implicit overrides using Mono.Cecil.

So basically what I know is that IsReuseSlot is relevant to class virtual methods, but is how is it done for interfaces, and is it always an implicit override for IsReuseSlot (except for .ctor seems to have it too), and how would it interact with generics, and do default interface implementations interact in a way that is problematic?

Example of what I'm after

Method a is virtual

Method b implicitly overrides method a
Method c explicitly overrides method a

Method d implicitly overrides method b and is sealed

Method e is in a class that overrides method d and is NewSlot (or new in c#)

Method f implicitly overrides method e

Calling the hypothetical method that returns the direct implicit overrides would return the following:

a -> []

b -> [a]

c -> []

d -> [b]

e -> []

f -> [e]

How would I go about doing this?

Thanks in advance!

[Jb Evain]

Hi,

There's no built-in way to achieve this, this is not an easy problem.

The Mono linker creates a map of methods:

https://github.com/mono/linker/blob/master/src/linker/Linker.Steps/TypeMapStep.cs

By browsing the type hierarchy for implicit overrides and checking the explicit overrides in the metadata.

Jb

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[Hamish Arblaster]

Thanks!

I'll try using that later today.