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Rollup merge of #123976 - ChrisDenton:no-libc-in-std-doc-tests, r=Mark-Simulacrum

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Use fake libc in core test

The war on libc continues.

Some platforms may not need to link to the libc crate (and it's possible some may not even have a libc), therefore we shouldn't require it for tests. This creates dummy `malloc` and `free` implementations for use in the pointer docs, but, keeps the public documentation looking the same as before.
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许杰友 Jieyou Xu (Joe) 2024-04-20 21:45:35 +01:00 committed by GitHub
commit a73aabfa92
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1 changed files with 6 additions and 2 deletions
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8
library/core/src/primitive_docs.rs
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@ -537,7 +537,11 @@ impl () {}
/// ## 4. Get it from C.
///
/// ```
/// # #![feature(rustc_private)]
/// # mod libc {
/// # pub unsafe fn malloc(_size: usize) -> *mut core::ffi::c_void { core::ptr::NonNull::dangling().as_ptr() }
/// # pub unsafe fn free(_ptr: *mut core::ffi::c_void) {}
/// # }
/// # #[cfg(any())]
/// #[allow(unused_extern_crates)]
/// extern crate libc;
///
@ -548,7 +552,7 @@ impl () {}
/// if my_num.is_null() {
/// panic!("failed to allocate memory");
/// }
/// libc::free(my_num as *mut libc::c_void);
/// libc::free(my_num as *mut core::ffi::c_void);
/// }
/// ```
///