LL | let Some(y) = x;
| ^^^^^^^ pattern `None` not covered
|
- ::: $SRC_DIR/core/src/option.rs:LL:COL
- |
-LL | None,
- | ---- not covered
- |
= note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
= note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
+note: `Option<i32>` defined here
+ --> $SRC_DIR/core/src/option.rs:LL:COL
+ |
+LL | / pub enum Option<T> {
+LL | | /// No value.
+LL | | #[lang = "None"]
+LL | | #[stable(feature = "rust1", since = "1.0.0")]
+LL | | None,
+ | | ^^^^ not covered
+... |
+LL | | Some(#[stable(feature = "rust1", since = "1.0.0")] T),
+LL | | }
+ | |_-
= note: the matched value is of type `Option<i32>`
help: you might want to use `if let` to ignore the variant that isn't matched
|
-LL | if let Some(y) = x { /* */ }
- | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+LL | let y = if let Some(y) = x { y } else { todo!() };
+ | ++++++++++ ++++++++++++++++++++++
+help: alternatively, on nightly, you might want to use `#![feature(let_else)]` to handle the variant that isn't matched
+ |
+LL | let Some(y) = x else { todo!() };
+ | ++++++++++++++++
error: aborting due to previous error