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Detect turbofish with multiple type params missing leading ::

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Fix #76072.
This commit is contained in:
Esteban Küber 2020-08-31 10:24:37 -07:00
parent 85fbf49ce0
commit 62effcbd5b
4 changed files with 167 additions and 9 deletions
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21
src/test/ui/did_you_mean/issue-40396.rs
View file

@ -1,8 +1,29 @@
fn main() {
(0..13).collect<Vec<i32>>();
//~^ ERROR comparison operators cannot be chained
//~| HELP use `::<...>` instead
Vec<i32>::new();
//~^ ERROR comparison operators cannot be chained
//~| HELP use `::<...>` instead
(0..13).collect<Vec<i32>();
//~^ ERROR comparison operators cannot be chained
//~| HELP use `::<...>` instead
let x = std::collections::HashMap<i128, i128>::new(); //~ ERROR expected one of
//~^ HELP use `::<...>` instead
let x: () = 42; //~ ERROR mismatched types
let x = {
std::collections::HashMap<i128, i128>::new() //~ ERROR expected one of
//~^ HELP use `::<...>` instead
};
let x: () = 42; //~ ERROR mismatched types
let x = {
std::collections::HashMap<i128, i128>::new(); //~ ERROR expected one of
//~^ HELP use `::<...>` instead
let x: () = 42; //~ ERROR mismatched types
};
{
std::collections::HashMap<i128, i128>::new(1, 2); //~ ERROR expected one of
//~^ HELP use `::<...>` instead
let x: () = 32; //~ ERROR mismatched types
};
}

83
src/test/ui/did_you_mean/issue-40396.stderr
View file

@ -10,7 +10,7 @@ LL | (0..13).collect::<Vec<i32>>();
| ^^
error: comparison operators cannot be chained
--> $DIR/issue-40396.rs:4:8
--> $DIR/issue-40396.rs:5:8
|
LL | Vec<i32>::new();
| ^ ^
@ -21,7 +21,7 @@ LL | Vec::<i32>::new();
| ^^
error: comparison operators cannot be chained
--> $DIR/issue-40396.rs:6:20
--> $DIR/issue-40396.rs:8:20
|
LL | (0..13).collect<Vec<i32>();
| ^ ^
@ -31,5 +31,82 @@ help: use `::<...>` instead of `<...>` to specify type arguments
LL | (0..13).collect::<Vec<i32>();
| ^^
error: aborting due to 3 previous errors
error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, or an operator, found `,`
--> $DIR/issue-40396.rs:11:43
|
LL | let x = std::collections::HashMap<i128, i128>::new();
| ^ expected one of 7 possible tokens
|
help: use `::<...>` instead of `<...>` to specify type arguments
|
LL | let x = std::collections::HashMap::<i128, i128>::new();
| ^^
error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found `,`
--> $DIR/issue-40396.rs:15:39
|
LL | std::collections::HashMap<i128, i128>::new()
| ^ expected one of 8 possible tokens
|
help: use `::<...>` instead of `<...>` to specify type arguments
|
LL | std::collections::HashMap::<i128, i128>::new()
| ^^
error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found `,`
--> $DIR/issue-40396.rs:20:39
|
LL | std::collections::HashMap<i128, i128>::new();
| ^ expected one of 8 possible tokens
|
help: use `::<...>` instead of `<...>` to specify type arguments
|
LL | std::collections::HashMap::<i128, i128>::new();
| ^^
error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found `,`
--> $DIR/issue-40396.rs:25:39
|
LL | std::collections::HashMap<i128, i128>::new(1, 2);
| ^ expected one of 8 possible tokens
|
help: use `::<...>` instead of `<...>` to specify type arguments
|
LL | std::collections::HashMap::<i128, i128>::new(1, 2);
| ^^
error[E0308]: mismatched types
--> $DIR/issue-40396.rs:13:17
|
LL | let x: () = 42;
| -- ^^ expected `()`, found integer
| |
| expected due to this
error[E0308]: mismatched types
--> $DIR/issue-40396.rs:18:17
|
LL | let x: () = 42;
| -- ^^ expected `()`, found integer
| |
| expected due to this
error[E0308]: mismatched types
--> $DIR/issue-40396.rs:22:21
|
LL | let x: () = 42;
| -- ^^ expected `()`, found integer
| |
| expected due to this
error[E0308]: mismatched types
--> $DIR/issue-40396.rs:27:21
|
LL | let x: () = 32;
| -- ^^ expected `()`, found integer
| |
| expected due to this
error: aborting due to 11 previous errors
For more information about this error, try `rustc --explain E0308`.