underscore-ident-matcher

Author: Kivooeo

tests/ui/macros/macro-fragment-ident-underscore-error.rs

@@ -1,7 +1,10 @@
+//! Verifies that the reserved underscore `_` cannot be used as an `ident` fragment specifier
+//! within a macro pattern, as it leads to a compilation error.
+
 macro_rules! identity {
-    ($i: ident) => (
+    ($i: ident) => {
         $i
-    )
+    };
 }
 
 fn main() {

tests/ui/macros/macro-fragment-ident-underscore-error.stderr

@@ -1,5 +1,5 @@
 error: no rules expected reserved identifier `_`
-  --> $DIR/underscore-ident-matcher.rs:8:19
+  --> $DIR/macro-fragment-ident-underscore-error.rs:11:19
    |
 LL | macro_rules! identity {
    | --------------------- when calling this macro
@@ -8,9 +8,9 @@ LL |     let identity!(_) = 10;
    |                   ^ no rules expected this token in macro call
    |
 note: while trying to match meta-variable `$i:ident`
-  --> $DIR/underscore-ident-matcher.rs:2:6
+  --> $DIR/macro-fragment-ident-underscore-error.rs:5:6
    |
-LL |     ($i: ident) => (
+LL |     ($i: ident) => {
    |      ^^^^^^^^^
 
 error: aborting due to 1 previous error