fix: allow equality expressions in parsing of format_args

Author: dfireBird

src/tools/rust-analyzer/crates/ide-assists/src/handlers/extract_function.rs

@@ -6268,6 +6268,28 @@ fn main() {
 
 fn $0fun_name(s: &Foo) {
     *print!("{}{}", s, s);
+}"#,
+        );
+    }
+
+    #[test]
+    fn parameter_is_added_used_in_eq_expression_in_macro() {
+        check_assist(
+            extract_function,
+            r#"
+//- minicore: fmt
+fn foo() {
+   let v = 123;
+   $0print!("{v:?}{}", v == 123);$0
+}"#,
+            r#"
+fn foo() {
+   let v = 123;
+   fun_name(v);
+}
+
+fn $0fun_name(v: i32) {
+    print!("{v:?}{}", v == 123);
 }"#,
         );
     }

src/tools/rust-analyzer/crates/parser/src/grammar/expressions/atom.rs

@@ -283,7 +283,7 @@ fn builtin_expr(p: &mut Parser<'_>) -> Option<CompletedMarker> {
         if p.eat(T![,]) {
             while !p.at(EOF) && !p.at(T![')']) {
                 let m = p.start();
-                if p.at(IDENT) && p.nth_at(1, T![=]) {
+                if p.at(IDENT) && p.nth_at(1, T![=]) && !p.nth_at(2, T![=]) {
                     name(p);
                     p.bump(T![=]);
                 }