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Update error code docs even more

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This commit is contained in:
Ryan Levick 2021-03-18 17:45:30 +01:00
parent 4f67392c48
commit 2c1429ca5e
2 changed files with 8 additions and 12 deletions
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4
compiler/rustc_error_codes/src/error_codes/E0782.md
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@ -4,7 +4,7 @@ Erroneous code example:
```edition2021,compile_fail,E782 ```edition2021,compile_fail,E782
trait Foo {} trait Foo {}
fn test(arg: Box<Foo>) {} fn test(arg: Box<Foo>) {} // error!
``` ```
Trait objects are a way to call methods on types that are not known until Trait objects are a way to call methods on types that are not known until
@ -20,7 +20,7 @@ To fix this issue, add `dyn` before the trait name.
``` ```
trait Foo {} trait Foo {}
fn test(arg: Box<dyn Foo>) {} fn test(arg: Box<dyn Foo>) {} // ok!
``` ```
This used to be allowed before edition 2021, but is now an error. This used to be allowed before edition 2021, but is now an error.

16
compiler/rustc_error_codes/src/error_codes/E0783.md
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@ -3,11 +3,9 @@ The range pattern `...` is no longer allowed.
Erroneous code example: Erroneous code example:
```edition2021,compile_fail,E782 ```edition2021,compile_fail,E782
fn main() { match 2u8 {
match 2u8 { 0...9 => println!("Got a number less than 10"), // error!
0...9 => println!("Got a number less than 10"), _ => println!("Got a number 10 or more"),
_ => println!("Got a number 10 or more")
}
} }
``` ```
@ -17,10 +15,8 @@ ranges which are now signified using `..=`.
To make this code compile replace the `...` with `..=`. To make this code compile replace the `...` with `..=`.
``` ```
fn main() { match 2u8 {
match 2u8 { 0..=9 => println!("Got a number less than 10"), // ok!
0..=9 => println!("Got a number less than 10"), _ => println!("Got a number 10 or more"),
_ => println!("Got a number 10 or more")
}
} }
``` ```