diff options
Diffstat (limited to 'src/doc/book/listings/ch15-smart-pointers/listing-15-18')
3 files changed, 25 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.lock b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.lock new file mode 100644 index 000000000..a792c49aa --- /dev/null +++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "cons-list" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.toml b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.toml new file mode 100644 index 000000000..dce1515c3 --- /dev/null +++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "cons-list" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch15-smart-pointers/listing-15-18/src/main.rs b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/src/main.rs new file mode 100644 index 000000000..602f7de40 --- /dev/null +++ b/src/doc/book/listings/ch15-smart-pointers/listing-15-18/src/main.rs @@ -0,0 +1,13 @@ +enum List { + Cons(i32, Rc<List>), + Nil, +} + +use crate::List::{Cons, Nil}; +use std::rc::Rc; + +fn main() { + let a = Rc::new(Cons(5, Rc::new(Cons(10, Rc::new(Nil))))); + let b = Cons(3, Rc::clone(&a)); + let c = Cons(4, Rc::clone(&a)); +} |