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Throw error when encountering ... instead of .. while destructing a pattern

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Added tests and stderr output
This commit is contained in:
Rakshith Ravi 2020-03-26 10:36:52 +05:30
parent a17dd36084
commit 73c82030e8
3 changed files with 57 additions and 0 deletions
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7
src/test/ui/parser/issue-70388-recover-dotdotdot-rest-pat.rs Normal file
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@ -0,0 +1,7 @@
struct Foo(i32);
fn main() {
let Foo(...) = Foo(0); //~ ERROR unexpected `...`
let [_, ..., _] = [0, 1]; //~ ERROR unexpected `...`
let _recovery_witness: () = 0; //~ ERROR mismatched types
}

29
src/test/ui/parser/issue-70388-recover-dotdotdot-rest-pat.stderr Normal file
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error: unexpected `...`
--> $DIR/issue-70388-recover-dotdotdot-rest-pat.rs:4:13
|
LL | let Foo(...) = Foo(0);
| ^^^
| |
| not a valid pattern
| help: for a rest pattern, use `..` instead of `...`
error: unexpected `...`
--> $DIR/issue-70388-recover-dotdotdot-rest-pat.rs:5:13
|
LL | let [_, ..., _] = [0, 1];
| ^^^
| |
| not a valid pattern
| help: for a rest pattern, use `..` instead of `...`
error[E0308]: mismatched types
--> $DIR/issue-70388-recover-dotdotdot-rest-pat.rs:6:33
|
LL | let _recovery_witness: () = 0;
| -- ^ expected `()`, found integer
| |
| expected due to this
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0308`.