Bug: /crates/samples/create_window/src/main.rs Line 40 expected *-ptr, found enum `Option`

[bmariuszb]

Which crate is this about?

windows

Crate version

0.39.0

Summary

No response

Toolchain version/configuration

No response

Reproducible example

No response

Crate manifest

[package]
name = "winows"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies.windows]
version = "0.39.0"
features = [
    "Win32_Foundation",
    "Win32_Graphics_Gdi",
    "Win32_System_LibraryLoader",
    "Win32_UI_WindowsAndMessaging",
]

Expected behavior

Sample runs without errors.

Actual behavior

error[E0308]: mismatched types
--> src\main.rs:40:38
|
40 | ValidateRect(window, None);
| ------------ ^^^^ expected *-ptr, found enum Option
| |
| arguments to this function are incorrect
|
= note: expected raw pointer *const RECT
found enum Option<_>

Additional comments

No response

[MRahilly]

Does this work?
ValidateRect(window, std::ptr::null_mut());

[bmariuszb]

yes

[kennykerr]

The samples in the repo compile with the latest, usually pre-release, version of the windows or windows-sys crate. To find the samples for a particular release you can use a specific release tag. For example:

https://github.com/microsoft/windows-rs/tree/0.39.0

That will give you the samples that compile with version 0.39 of the windows crate.

[bmariuszb]

Maybe you could add that note to readme in samples directory?

[kennykerr]

Sure! Here you go: #1980

[kennykerr]

So yes, I'd love to but Cargo 1.46 doesn't appear to support that. #1980

Perhaps in future when we no longer need to validate against 1.46 for windows-sys.

[kennykerr]

Fixed! #1991