mbe: Modify error message to mention "function-like invocation"

Author: joshtriplett

compiler/rustc_expand/src/mbe/diagnostics.rs

@@ -59,9 +59,11 @@ pub(super) fn failed_to_match_macro(
     let Some(BestFailure { token, msg: label, remaining_matcher, .. }) = tracker.best_failure
     else {
         if attr_args.is_none() && !rules.iter().any(|rule| matches!(rule, MacroRule::Func { .. })) {
-            let mut err = psess.dcx().struct_span_err(sp, "invoked macro has no invocation rules");
+            let msg = format!("macro has no rules for function-like invocation `{name}!`");
+            let mut err = psess.dcx().struct_span_err(sp, msg);
             if !def_head_span.is_dummy() {
-                err.span_label(def_head_span, "this macro has no rules to invoke");
+                let msg = "this macro has no rules for function-like invocation";
+                err.span_label(def_head_span, msg);
             }
             return (sp, err.emit());
         }

tests/ui/macros/macro-rules-attr-error.rs

@@ -11,5 +11,5 @@ fn main() {
     #[local_attr]
     struct S;
 
-    local_attr!(arg); //~ ERROR: invoked macro has no invocation rules
+    local_attr!(arg); //~ ERROR: macro has no rules for function-like invocation
 }

tests/ui/macros/macro-rules-attr-error.stderr

@@ -9,11 +9,11 @@ LL |     #[local_attr]
    |
    = note: this error originates in the attribute macro `local_attr` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: invoked macro has no invocation rules
+error: macro has no rules for function-like invocation `local_attr!`
   --> $DIR/macro-rules-attr-error.rs:14:5
    |
 LL | macro_rules! local_attr {
-   | ----------------------- this macro has no rules to invoke
+   | ----------------------- this macro has no rules for function-like invocation
 ...
 LL |     local_attr!(arg);
    |     ^^^^^^^^^^^^^^^^