diff options
Diffstat (limited to 'exercises/lifetimes/README.md')
| -rw-r--r-- | exercises/lifetimes/README.md | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/exercises/lifetimes/README.md b/exercises/lifetimes/README.md new file mode 100644 index 0000000..72befb3 --- /dev/null +++ b/exercises/lifetimes/README.md @@ -0,0 +1,17 @@ +# Lifetimes + +Lifetimes tell the compiler how to check whether references live long +enough to be valid in any given situation. For example lifetimes say +"make sure parameter 'a' lives as long as parameter 'b' so that the return +value is valid". + +They are only necessary on borrows, i.e. references, +since copied parameters or moves are owned in their scope and cannot +be referenced outside. Lifetimes mean that calling code of e.g. functions +can be checked to make sure their arguments are valid. Lifetimes are +restrictive of their callers. + +## Further information + +- [Validating References with Lifetimes](https://doc.rust-lang.org/book/ch10-03-lifetime-syntax.html) +- [Lifetimes (in Rust By Example)](https://doc.rust-lang.org/stable/rust-by-example/scope/lifetime.html) |