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rust: str: add fmt! macro

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Add the `fmt!` macro, which is a convenience alias for the Rust
`core::format_args!` macro.

For instance, it may be used to create a `CString`:

    CString::try_from_fmt(fmt!("{}{}", "abc", 42))?

Signed-off-by: Wedson Almeida Filho <wedsonaf@gmail.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
[Reworded, adapted for upstream and applied latest changes]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Wedson Almeida Filho 2022-11-10 17:41:34 +01:00 committed by Miguel Ojeda
parent 65e1e497f6
commit ef32054942
1 changed files with 6 additions and 0 deletions
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6
rust/kernel/str.rs
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@ -583,3 +583,9 @@ impl Deref for CString {
unsafe { CStr::from_bytes_with_nul_unchecked(self.buf.as_slice()) }
}
}
/// A convenience alias for [`core::format_args`].
#[macro_export]
macro_rules! fmt {
($($f:tt)*) => ( core::format_args!($($f)*) )
}