Port #[link_ordinal] to the new attribute parsing infrastructure.

Author: Periodic1911

tests/ui/linkage-attr/raw-dylib/windows/link-ordinal-invalid-format.rs

@@ -1,10 +1,10 @@
 #[link(name = "foo")]
 extern "C" {
     #[link_ordinal("JustMonika")]
-    //~^ ERROR illegal ordinal format in `link_ordinal`
+    //~^ ERROR malformed `link_ordinal` attribute input
     fn foo();
     #[link_ordinal("JustMonika")]
-    //~^ ERROR illegal ordinal format in `link_ordinal`
+    //~^ ERROR malformed `link_ordinal` attribute input
     static mut imported_variable: i32;
 }
 

tests/ui/linkage-attr/raw-dylib/windows/link-ordinal-invalid-format.stderr

@@ -1,18 +1,21 @@
-error: illegal ordinal format in `link_ordinal`
+error[E0539]: malformed `link_ordinal` attribute input
   --> $DIR/link-ordinal-invalid-format.rs:3:5
    |
 LL |     #[link_ordinal("JustMonika")]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: an unsuffixed integer value, e.g., `1`, is expected
+   |     ^^^^^^^^^^^^^^^------------^^
+   |     |              |
+   |     |              expected an integer literal here
+   |     help: must be of the form: `#[link_ordinal(ordinal)]`
 
-error: illegal ordinal format in `link_ordinal`
+error[E0539]: malformed `link_ordinal` attribute input
   --> $DIR/link-ordinal-invalid-format.rs:6:5
    |
 LL |     #[link_ordinal("JustMonika")]
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: an unsuffixed integer value, e.g., `1`, is expected
+   |     ^^^^^^^^^^^^^^^------------^^
+   |     |              |
+   |     |              expected an integer literal here
+   |     help: must be of the form: `#[link_ordinal(ordinal)]`
 
 error: aborting due to 2 previous errors
 
+For more information about this error, try `rustc --explain E0539`.

tests/ui/linkage-attr/raw-dylib/windows/link-ordinal-missing-argument.stderr

@@ -2,18 +2,18 @@ error[E0805]: malformed `link_ordinal` attribute input
   --> $DIR/link-ordinal-missing-argument.rs:3:5
    |
 LL |     #[link_ordinal()]
-   |     ^^^^^^^^^^^^^^^^^
-   |     |
-   |     expected a single argument here
+   |     ^^^^^^^^^^^^^^--^
+   |     |             |
+   |     |             expected a single argument here
    |     help: must be of the form: `#[link_ordinal(ordinal)]`
 
 error[E0805]: malformed `link_ordinal` attribute input
   --> $DIR/link-ordinal-missing-argument.rs:7:5
    |
 LL |     #[link_ordinal()]
-   |     ^^^^^^^^^^^^^^^^^
-   |     |
-   |     expected a single argument here
+   |     ^^^^^^^^^^^^^^--^
+   |     |             |
+   |     |             expected a single argument here
    |     help: must be of the form: `#[link_ordinal(ordinal)]`
 
 error: aborting due to 2 previous errors

tests/ui/linkage-attr/raw-dylib/windows/link-ordinal-too-many-arguments.stderr

@@ -2,18 +2,18 @@ error[E0805]: malformed `link_ordinal` attribute input
   --> $DIR/link-ordinal-too-many-arguments.rs:3:5
    |
 LL |     #[link_ordinal(3, 4)]
-   |     ^^^^^^^^^^^^^^^^^^^^^
-   |     |
-   |     expected a single argument here
+   |     ^^^^^^^^^^^^^^------^
+   |     |             |
+   |     |             expected a single argument here
    |     help: must be of the form: `#[link_ordinal(ordinal)]`
 
 error[E0805]: malformed `link_ordinal` attribute input
   --> $DIR/link-ordinal-too-many-arguments.rs:7:5
    |
 LL |     #[link_ordinal(3, 4)]
-   |     ^^^^^^^^^^^^^^^^^^^^^
-   |     |
-   |     expected a single argument here
+   |     ^^^^^^^^^^^^^^------^
+   |     |             |
+   |     |             expected a single argument here
    |     help: must be of the form: `#[link_ordinal(ordinal)]`
 
 error: aborting due to 2 previous errors