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0f595bab9d
Add the `build_error!` and `build_assert!` macros which leverage
the previously introduced `build_error` crate. Do so in a new
module, called `build_assert`.
The former fails the build if the code path calling it can possibly
be executed. The latter asserts that a boolean expression is `true`
at compile time.
In particular, `build_assert!` can be used in some contexts where
`static_assert!` cannot:
fn f1<const N: usize>() {
static_assert!(N > 1);` // Error.
build_assert!(N > 1); // Build-time check.
assert!(N > 1); // Run-time check.
}
#[inline]
fn f2(n: usize) {
static_assert!(n > 1); // Error.
build_assert!(n > 1); // Build-time check.
assert!(n > 1); // Run-time check.
}
Signed-off-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
[Reworded, adapted for upstream and applied latest changes]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
29 lines
616 B
Rust
29 lines
616 B
Rust
// SPDX-License-Identifier: GPL-2.0
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//! The `kernel` prelude.
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//!
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//! These are the most common items used by Rust code in the kernel,
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//! intended to be imported by all Rust code, for convenience.
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//!
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//! # Examples
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//!
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//! ```
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//! use kernel::prelude::*;
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//! ```
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pub use core::pin::Pin;
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pub use alloc::{boxed::Box, vec::Vec};
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pub use macros::{module, vtable};
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pub use super::build_assert;
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pub use super::{dbg, pr_alert, pr_crit, pr_debug, pr_emerg, pr_err, pr_info, pr_notice, pr_warn};
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pub use super::static_assert;
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pub use super::error::{code::*, Error, Result};
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pub use super::{str::CStr, ThisModule};
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