mbe: In error messages, don't assume attributes are always proc macros

joshtriplett · joshtriplett · commit 71de942b8b88 · 2025-08-08T10:35:47.000-07:00
Now that `macro_rules` macros can define attribute rules, make sure
error messages account for that.
diff --git a/tests/fail/alloc/alloc_error_handler_custom.stderr b/tests/fail/alloc/alloc_error_handler_custom.stderr
@@ -11,7 +11,7 @@ note: inside `_::__rg_oom`
   --> tests/fail/alloc/alloc_error_handler_custom.rs:LL:CC
    |
 LL | #[alloc_error_handler]
-   | ---------------------- in this procedural macro expansion
+   | ---------------------- in this attribute macro expansion
 LL | fn alloc_error_handler(layout: Layout) -> ! {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = note: inside `alloc::alloc::handle_alloc_error::rt_error` at RUSTLIB/alloc/src/alloc.rs:LL:CC

Original file line number	Diff line number	Diff line change
@@ -11,7 +11,7 @@ note: inside `_::__rg_oom`
`11`	`11`	`--> tests/fail/alloc/alloc_error_handler_custom.rs:LL:CC`
`12`	`12`	`\|`
`13`	`13`	`LL \| #[alloc_error_handler]`
`14`		`- \| ---------------------- in this procedural macro expansion`
	`14`	`+ \| ---------------------- in this attribute macro expansion`
`15`	`15`	`LL \| fn alloc_error_handler(layout: Layout) -> ! {`
`16`	`16`	`\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
`17`	`17`	= note: inside `alloc::alloc::handle_alloc_error::rt_error` at RUSTLIB/alloc/src/alloc.rs:LL:CC