Incorporate issue-111692.rs into the larger test file and add more test cases

Note that issue-111692.rs was incorrectly named: It's a regression test for
issue [#]112278, not for [#]111692. That's been addressed, too.

Author: fmease

src/tools/tidy/src/issues.txt

@@ -3189,7 +3189,6 @@ ui/parser/issues/issue-108495-dec.rs
 ui/parser/issues/issue-110014.rs
 ui/parser/issues/issue-111148.rs
 ui/parser/issues/issue-111416.rs
-ui/parser/issues/issue-111692.rs
 ui/parser/issues/issue-112188.rs
 ui/parser/issues/issue-112458.rs
 ui/parser/issues/issue-113110-non-item-at-module-root.rs

tests/ui/parser/issues/issue-111692.rs

@@ -45,12 +45,30 @@ fn main() {
         println!("yo");
     }
 
+    // This use `one()` over `1` as token `one` may begin a type and thus back when type ascription
+    // `$expr : $ty` still existed, `{ x: one` could've been the start of a block expr which used to
+    // make the compiler take a different execution path. Now it no longer makes a difference tho.
+
     // Regression test for <https://github.com/rust-lang/rust/issues/82051>.
     if Foo { x: one(), }.hi() { //~ ERROR struct literals are not allowed here
         println!("Positive!");
     }
+
+    const FOO: Foo = Foo { x: 1 };
+    // Below, test that we correctly parenthesize the struct literals.
+
+    // Regression test for <https://github.com/rust-lang/rust/issues/112278>.
+    if FOO == self::Foo { x: one() } {} //~ ERROR struct literals are not allowed here
+
+    if FOO == Foo::<> { x: one() } {} //~ ERROR struct literals are not allowed here
+
+    fn env<T: Trait<Out = Foo>>() {
+        if FOO == <T as Trait>::Out { x: one() } {} //~ ERROR struct literals are not allowed here
+        //~^ ERROR usage of qualified paths in this context is experimental
+    }
 }
 
+#[derive(PartialEq, Eq)]
 struct Foo {
     x: isize,
 }
@@ -70,3 +88,5 @@ enum E {
 }
 
 fn one() -> isize { 1 }
+
+trait Trait { type Out; }

tests/ui/parser/issues/issue-111692.stderr

@@ -120,7 +120,7 @@ LL |     while || (Foo { x: 3 }).hi() {
    |              +            +
 
 error: struct literals are not allowed here
-  --> $DIR/struct-literals-in-invalid-places.rs:49:8
+  --> $DIR/struct-literals-in-invalid-places.rs:53:8
    |
 LL |     if Foo { x: one(), }.hi() {
    |        ^^^^^^^^^^^^^^^^^
@@ -130,6 +130,49 @@ help: surround the struct literal with parentheses
 LL |     if (Foo { x: one(), }).hi() {
    |        +                 +
 
+error: struct literals are not allowed here
+  --> $DIR/struct-literals-in-invalid-places.rs:61:15
+   |
+LL |     if FOO == self::Foo { x: one() } {}
+   |               ^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: surround the struct literal with parentheses
+   |
+LL |     if FOO == (self::Foo { x: one() }) {}
+   |               +                      +
+
+error: struct literals are not allowed here
+  --> $DIR/struct-literals-in-invalid-places.rs:63:15
+   |
+LL |     if FOO == Foo::<> { x: one() } {}
+   |               ^^^^^^^^^^^^^^^^^^^^
+   |
+help: surround the struct literal with parentheses
+   |
+LL |     if FOO == (Foo::<> { x: one() }) {}
+   |               +                    +
+
+error: struct literals are not allowed here
+  --> $DIR/struct-literals-in-invalid-places.rs:66:19
+   |
+LL |         if FOO == <T as Trait>::Out { x: one() } {}
+   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: surround the struct literal with parentheses
+   |
+LL |         if FOO == (<T as Trait>::Out { x: one() }) {}
+   |                   +                              +
+
+error[E0658]: usage of qualified paths in this context is experimental
+  --> $DIR/struct-literals-in-invalid-places.rs:66:19
+   |
+LL |         if FOO == <T as Trait>::Out { x: one() } {}
+   |                   ^^^^^^^^^^^^^^^^^
+   |
+   = note: see issue #86935 <https://github.com/rust-lang/rust/issues/86935> for more information
+   = help: add `#![feature(more_qualified_paths)]` to the crate attributes to enable
+   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
+
 error[E0277]: `bool` is not an iterator
   --> $DIR/struct-literals-in-invalid-places.rs:9:14
    |
@@ -185,7 +228,7 @@ help: use parentheses to call this closure
 LL |     while (|| Foo { x: 3 }.hi())() {
    |           +                    +++
 
-error: aborting due to 17 previous errors
+error: aborting due to 21 previous errors
 
-Some errors have detailed explanations: E0277, E0308, E0533.
+Some errors have detailed explanations: E0277, E0308, E0533, E0658.
 For more information about an error, try `rustc --explain E0277`.