Add test for coverage on a body-less trait function

Author: ehuss

tests/ui/coverage-attr/no-coverage.rs

@@ -12,6 +12,12 @@ trait Trait {
     type T;
 
     type U;
+
+    #[coverage(off)] //~ ERROR attribute should be applied to a function definition or closure
+    fn f(&self);
+
+    #[coverage(off)] //~ ERROR attribute should be applied to a function definition or closure
+    fn g();
 }
 
 #[coverage(off)]
@@ -23,6 +29,9 @@ impl Trait for () {
 
     #[coverage(off)] //~ ERROR attribute should be applied to a function definition or closure
     type U = impl Trait; //~ ERROR unconstrained opaque type
+
+    fn f(&self) {}
+    fn g() {}
 }
 
 extern "C" {

tests/ui/coverage-attr/no-coverage.stderr

@@ -7,28 +7,28 @@ LL | / trait Trait {
 LL | |     #[coverage(off)]
 LL | |     const X: u32;
 ...  |
-LL | |     type U;
+LL | |     fn g();
 LL | | }
    | |_- not a function or closure
 
 error[E0788]: attribute should be applied to a function definition or closure
-  --> $DIR/no-coverage.rs:38:5
+  --> $DIR/no-coverage.rs:47:5
    |
 LL |     #[coverage(off)]
    |     ^^^^^^^^^^^^^^^^
 LL |     let _ = ();
    |     ----------- not a function or closure
 
 error[E0788]: attribute should be applied to a function definition or closure
-  --> $DIR/no-coverage.rs:42:9
+  --> $DIR/no-coverage.rs:51:9
    |
 LL |         #[coverage(off)]
    |         ^^^^^^^^^^^^^^^^
 LL |         () => (),
    |         -------- not a function or closure
 
 error[E0788]: attribute should be applied to a function definition or closure
-  --> $DIR/no-coverage.rs:46:5
+  --> $DIR/no-coverage.rs:55:5
    |
 LL |     #[coverage(off)]
    |     ^^^^^^^^^^^^^^^^
@@ -52,45 +52,61 @@ LL |     type T;
    |     ------- not a function or closure
 
 error[E0788]: attribute should be applied to a function definition or closure
-  --> $DIR/no-coverage.rs:21:5
+  --> $DIR/no-coverage.rs:16:5
+   |
+LL |     #[coverage(off)]
+   |     ^^^^^^^^^^^^^^^^
+LL |     fn f(&self);
+   |     ------------ not a function or closure
+
+error[E0788]: attribute should be applied to a function definition or closure
+  --> $DIR/no-coverage.rs:19:5
+   |
+LL |     #[coverage(off)]
+   |     ^^^^^^^^^^^^^^^^
+LL |     fn g();
+   |     ------- not a function or closure
+
+error[E0788]: attribute should be applied to a function definition or closure
+  --> $DIR/no-coverage.rs:27:5
    |
 LL |     #[coverage(off)]
    |     ^^^^^^^^^^^^^^^^
 LL |     type T = Self;
    |     -------------- not a function or closure
 
 error[E0788]: attribute should be applied to a function definition or closure
-  --> $DIR/no-coverage.rs:24:5
+  --> $DIR/no-coverage.rs:30:5
    |
 LL |     #[coverage(off)]
    |     ^^^^^^^^^^^^^^^^
 LL |     type U = impl Trait;
    |     -------------------- not a function or closure
 
 error[E0788]: attribute should be applied to a function definition or closure
-  --> $DIR/no-coverage.rs:29:5
+  --> $DIR/no-coverage.rs:38:5
    |
 LL |     #[coverage(off)]
    |     ^^^^^^^^^^^^^^^^
 LL |     static X: u32;
    |     -------------- not a function or closure
 
 error[E0788]: attribute should be applied to a function definition or closure
-  --> $DIR/no-coverage.rs:32:5
+  --> $DIR/no-coverage.rs:41:5
    |
 LL |     #[coverage(off)]
    |     ^^^^^^^^^^^^^^^^
 LL |     type T;
    |     ------- not a function or closure
 
 error: unconstrained opaque type
-  --> $DIR/no-coverage.rs:25:14
+  --> $DIR/no-coverage.rs:31:14
    |
 LL |     type U = impl Trait;
    |              ^^^^^^^^^^
    |
    = note: `U` must be used in combination with a concrete type within the same impl
 
-error: aborting due to 11 previous errors
+error: aborting due to 13 previous errors
 
 For more information about this error, try `rustc --explain E0788`.