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Fix Debug impls for COM interfaces #3066

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sivadeilra
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Currently, the Debug impl for COM interfaces shows the recursive interface chain, like so:

IDWriteFontFace5(IDWriteFontFace4(IDWriteFontFace3(IDWriteFontFace2(IDWriteFontFace(0xNNN)))))

That's not very useful. This PR trims it down to just the current interface:

IDWriteFontFace5(0xNNN)

Arlie Davis added 2 commits June 3, 2024 02:06
Currently, the Debug impl for COM interfaces shows the recursive
interface chain, like so:

```
IDWriteFontFace5(IDWriteFontFace4(IDWriteFontFace3(IDWriteFontFace2(IDWriteFontFace(0xNNN)))))
```

That's not very useful. This PR trims it down to just the current interface:

```
IDWriteFontFace5(0xNNN)
```
@sivadeilra sivadeilra requested a review from dpaoliello June 3, 2024 17:41
@sivadeilra sivadeilra merged commit b8586ad into microsoft:master Jun 3, 2024
90 checks passed
@sivadeilra sivadeilra deleted the user/ardavis/interface-debug-impl branch June 3, 2024 18:09
Comment on lines +423 to +425
println!("IUnknown = {iunknown:?}");
let ifoo: IFoo = app.to_interface();
println!("IFoo = {ifoo:?}");
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@kennykerr kennykerr Jun 4, 2024

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These are not tests. 😉 #3068

mati865 pushed a commit to mati865/windows-rs that referenced this pull request Jun 15, 2024
* Fix Debug impls for COM interfaces

Currently, the Debug impl for COM interfaces shows the recursive
interface chain, like so:

```
IDWriteFontFace5(IDWriteFontFace4(IDWriteFontFace3(IDWriteFontFace2(IDWriteFontFace(0xNNN)))))
```

That's not very useful. This PR trims it down to just the current interface:

```
IDWriteFontFace5(0xNNN)
```

* fix build break

---------

Co-authored-by: Arlie Davis <[email protected]>
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4 participants