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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132// SPDX-License-Identifier: GPL-2.0
//! Build-time error.//!//! This crate provides a [const function][const-functions] `build_error`, which will panic in//! 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-functions//! [const-context]: https://doc.rust-lang.org/reference/const_eval.html#const-context
#![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-context#[inline(never)]#[cold]#[export_name = "rust_build_error"]#[track_caller]pub const fn build_error(msg: &'static str) -> ! { panic!("{}", msg);}