Guillaume Gomez @imperio@toot.cat
Public

Added a new rustc lint which will hopefully prevent a lot of very wrong casts: function_casts_as_integer.

In short, if you convert a function to an integer, it will now warn.

Why? Because of cases like:

let _ = [0; u8::max as usize];

u8::max is a function, not a constant (u8::MAX is the constant). Now you get a surprising amount of allocation (and potentially different) every time. :)

So many potential other cases where the end code is NOT the expected one. Well, not anymore!

PR: github.com/rust-lang/rust/pull

The function_casts_as_integer lint detects cases where users cast a function pointer into an integer. warn-by-default Example fn foo() {} let x = foo as usize; warning: casting a function into an i...

Add new `function_casts_as_integer` lint by GuillaumeGomez · Pull Request #141470 · rust-lang/rust

The function_casts_as_integer lint detects cases where users cast a function pointer into an integer. warn-by-default Example fn foo() {} let x = foo as usize; warning: casting a function into an i...

github.com · GitHub

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