diff options
Diffstat (limited to 'src/doc/book/listings/ch19-advanced-features/listing-19-06')
3 files changed, 34 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.lock new file mode 100644 index 000000000..497817bf2 --- /dev/null +++ b/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "unsafe-example" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.toml new file mode 100644 index 000000000..3e8a29201 --- /dev/null +++ b/src/doc/book/listings/ch19-advanced-features/listing-19-06/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "unsafe-example" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-06/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-06/src/main.rs new file mode 100644 index 000000000..3af21f761 --- /dev/null +++ b/src/doc/book/listings/ch19-advanced-features/listing-19-06/src/main.rs @@ -0,0 +1,22 @@ +// ANCHOR: here +use std::slice; + +fn split_at_mut(values: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) { + let len = values.len(); + let ptr = values.as_mut_ptr(); + + assert!(mid <= len); + + unsafe { + ( + slice::from_raw_parts_mut(ptr, mid), + slice::from_raw_parts_mut(ptr.add(mid), len - mid), + ) + } +} +// ANCHOR_END: here + +fn main() { + let mut vector = vec![1, 2, 3, 4, 5, 6]; + let (left, right) = split_at_mut(&mut vector, 3); +} |