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Quelle build_error.rsSprache: Rust |
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// SPDX-License-Identifier: GPL-2.0 //! Build-time error. //! //! This crate provides a [const function][const-functions] `build_error`, which will pani //! compile-time if executed in [const context][const-context], and will cause a build error //! if not executed at compile time and the optimizer does not optimise away the call. //! //! It is used by `build_assert!` in the kernel crate, allowing checking of //! conditions that could be checked statically, but could not be enforced in //! Rust yet (e.g. perform some checks in [const functions][const-functions], but those //! functions could still be called in the runtime). //! //! For details on constant evaluation in Rust, please see the [Reference][const-eval]. //! //! [const-eval]: https://doc.rust-lang.org/reference/const_eval.html //! [const-functions]: https://doc.rust-lang.org/reference/const_eval.html#const-f //! [const-context]: https://doc.rust-lang.org/reference/const_eval.html#const-con #![no_std] /// Panics if executed in [const context][const-context], or triggers a build error if not. /// /// [const-context]: https://doc.rust-lang.org/reference/const_eval.html#const-con #[inline(never)] #[cold] #[export_name = "rust_build_error"] #[track_caller] pub const fn build_error(msg: &'static str) -> ! { panic!("{}", msg); }
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2026-07-09