diff options
Diffstat (limited to 'src/doc/book/listings/ch18-patterns-and-matching')
| -rw-r--r-- | src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/output.txt | 8 | ||||
| -rw-r--r-- | src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/output.txt | 2 |
2 files changed, 9 insertions, 1 deletions
diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/output.txt b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/output.txt index 0fd5373b8..52efabb5c 100644 --- a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/output.txt +++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-08/output.txt @@ -9,11 +9,19 @@ error[E0005]: refutable pattern in local binding: `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 + --> /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/option.rs:518:1 + | + = note: +/rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/option.rs:522:5: not covered = 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 | 3 | let x = if let Some(x) = some_option_value { x } else { todo!() }; | ++++++++++ ++++++++++++++++++++++ +help: alternatively, you might want to use let else to handle the variant that isn't matched + | +3 | let Some(x) = some_option_value else { todo!() }; + | ++++++++++++++++ For more information about this error, try `rustc --explain E0005`. error: could not compile `patterns` due to previous error diff --git a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/output.txt b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/output.txt index 702d10a23..6488fb29c 100644 --- a/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/output.txt +++ b/src/doc/book/listings/ch18-patterns-and-matching/listing-18-10/output.txt @@ -6,9 +6,9 @@ warning: irrefutable `if let` pattern 2 | if let x = 5 { | ^^^^^^^^^ | - = note: `#[warn(irrefutable_let_patterns)]` on by default = note: this pattern will always match, so the `if let` is useless = help: consider replacing the `if let` with a `let` + = note: `#[warn(irrefutable_let_patterns)]` on by default warning: `patterns` (bin "patterns") generated 1 warning Finished dev [unoptimized + debuginfo] target(s) in 0.39s |