Eliot Courtney 1d09c9ee13 rust: num: add cv! macro to create values from constant expressions ... Currently, using NonZero/Bounded constants is quite verbose. It's unfortunate because it disincentivizes using it in interface boundaries. Introduce a macro to make it nicer to use. The macro `cv!` (for constant value) takes a const integer expression and widens it to i128 (at build time only) before passing it as a const generic value to a new trait `FromConst`. The value is then converted and appears in the associated constant `FromConst::VALUE`. The trait is implemented by NonZero, Bounded, and Alignment and lets values of each be constructed from constants without a verbose turbofish syntax. For example, `const { NonZero::new(1).unwrap() }` can be written as `cv!(1)`. Add the `cv!` macro to the prelude so it doesn't need to be imported explicitly to use it. Suggested-by: Gary Guo <gary@garyguo.net> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Acked-by: Danilo Krummrich <dakr@kernel.org> Signed-off-by: Eliot Courtney <ecourtney@nvidia.com> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Link: https://patch.msgid.link/20261013-cv-v5-1-113a538dfaef@nvidia.com [ Added a few intra-doc links. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>		2026-10-13 12:33:16 +02:00
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bounded.rs	rust: num: add cv! macro to create values from constant expressions	2026-10-13 12:33:16 +02:00
casts.rs	rust: add functions and traits for lossless integer conversions	2026-08-13 13:41:28 +02:00