Add function pointer casts#95
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jonathanpallant merged 2 commits intorust-embedded:mainfrom Dec 3, 2025
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Removes compiler warning added to nightly recently. People often accidentally cast function pointers to integers when they meant to call the function and cast the result, but they forgot the (). So because we actually want to cast a function pointer we have to be clear about that.
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jannic
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At first I was a bit surprised that the warning emitted by rustc is different from what you added:
help: first cast to a pointer `as *const ()`
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71 | addr, bkpt_from_a32 as *const () as usize
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However then I read the comments on the PR introducing this lint, and realized that *const () is just a compromise.
The original author of the lint actually preferred the variant you chose. rust-lang/rust#141470 (comment)
LGTM
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Be explicit about pointer casts
Current nightly Rust now warns about function pointer casts
Bump nightly Rust compiler version for tests/examples