Rollup merge of #34495 - jseyfried:only_ident_macro_invocations, r=eddyb

Forbid type parameters and global paths in macro invocations

Fixes #28558.
This is a [breaking-change]. For example, the following would break:
```rust
macro_rules! m { () => { () } }
fn main() {
    m::<T>!(); // Type parameters are no longer allowed in macro invocations
    ::m!(); // Global paths are no longer allowed in macro invocations
}
```
Any breakage can be fixed by removing the type parameters or the leading `::` (respectively).

r? @eddyb

1 files changed, 3 insertions, 3 deletions

diff --git a/src/test/compile-fail/macro-with-seps-err-msg.rs b/src/test/compile-fail/macro-with-seps-err-msg.rs
index 95250e36b86..408bb15ba28 100644
--- a/src/test/compile-fail/macro-with-seps-err-msg.rs
+++ b/src/test/compile-fail/macro-with-seps-err-msg.rs
@@ -8,8 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// error-pattern:expected macro name without module separators
-
 fn main() {
-    globnar::brotz!();
+    globnar::brotz!(); //~ ERROR expected macro name without module separators
+    ::foo!(); //~ ERROR expected macro name without module separators
+    foo::<T>!(); //~ ERROR expected macro name without module separators
 }