Rollup merge of #74173 - estebank:struct-pat-as-enum, r=petrochenkov

Detect tuple struct incorrectly used as struct pat

Subpart of #74005.

r? @petrochenkov

src/test/ui/missing/missing-fields-in-struct-pattern.rs

@@ -2,8 +2,7 @@ struct S(usize, usize, usize, usize);
 
 fn main() {
     if let S { a, b, c, d } = S(1, 2, 3, 4) {
-    //~^ ERROR struct `S` does not have fields named `a`, `b`, `c`, `d` [E0026]
-    //~| ERROR pattern does not mention fields `0`, `1`, `2`, `3` [E0027]
+    //~^ ERROR tuple variant `S` written as struct variant
         println!("hi");
     }
 }

src/test/ui/missing/missing-fields-in-struct-pattern.stderr

@@ -1,18 +1,9 @@
-error[E0026]: struct `S` does not have fields named `a`, `b`, `c`, `d`
-  --> $DIR/missing-fields-in-struct-pattern.rs:4:16
-   |
-LL |     if let S { a, b, c, d } = S(1, 2, 3, 4) {
-   |                ^  ^  ^  ^ struct `S` does not have these fields
-
-error[E0027]: pattern does not mention fields `0`, `1`, `2`, `3`
+error[E0769]: tuple variant `S` written as struct variant
   --> $DIR/missing-fields-in-struct-pattern.rs:4:12
    |
 LL |     if let S { a, b, c, d } = S(1, 2, 3, 4) {
-   |            ^^^^^^^^^^^^^^^^ missing fields `0`, `1`, `2`, `3`
-   |
-   = note: trying to match a tuple variant with a struct variant pattern
+   |            ^^^^^^^^^^^^^^^^ help: use the tuple variant pattern syntax instead: `S(a, b, c, d)`
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0026, E0027.
-For more information about an error, try `rustc --explain E0026`.
+For more information about this error, try `rustc --explain E0769`.

src/test/ui/type/type-check/issue-41314.rs

@@ -4,7 +4,7 @@ enum X {
 
 fn main() {
     match X::Y(0) {
-        X::Y { number } => {} //~ ERROR does not have a field named `number`
-        //~^ ERROR pattern does not mention field `0`
+        X::Y { number } => {}
+        //~^ ERROR tuple variant `X::Y` written as struct variant
     }
 }

src/test/ui/type/type-check/issue-41314.stderr

@@ -1,18 +1,9 @@
-error[E0026]: variant `X::Y` does not have a field named `number`
-  --> $DIR/issue-41314.rs:7:16
-   |
-LL |         X::Y { number } => {}
-   |                ^^^^^^ variant `X::Y` does not have this field
-
-error[E0027]: pattern does not mention field `0`
+error[E0769]: tuple variant `X::Y` written as struct variant
   --> $DIR/issue-41314.rs:7:9
    |
 LL |         X::Y { number } => {}
-   |         ^^^^^^^^^^^^^^^ missing field `0`
-   |
-   = note: trying to match a tuple variant with a struct variant pattern
+   |         ^^^^^^^^^^^^^^^ help: use the tuple variant pattern syntax instead: `X::Y(number)`
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0026, E0027.
-For more information about an error, try `rustc --explain E0026`.
+For more information about this error, try `rustc --explain E0769`.

src/test/ui/union/union-fields-2.stderr

@@ -48,18 +48,18 @@ error: union patterns should have exactly one field
 LL |     let U { a, b } = u;
    |         ^^^^^^^^^^
 
-error[E0026]: union `U` does not have a field named `c`
-  --> $DIR/union-fields-2.rs:18:19
-   |
-LL |     let U { a, b, c } = u;
-   |                   ^ union `U` does not have this field
-
 error: union patterns should have exactly one field
   --> $DIR/union-fields-2.rs:18:9
    |
 LL |     let U { a, b, c } = u;
    |         ^^^^^^^^^^^^^
 
+error[E0026]: union `U` does not have a field named `c`
+  --> $DIR/union-fields-2.rs:18:19
+   |
+LL |     let U { a, b, c } = u;
+   |                   ^ union `U` does not have this field
+
 error: union patterns should have exactly one field
   --> $DIR/union-fields-2.rs:20:9
    |