Rework value parameter parsing

- `Fn__(...)` parameters with idents/patterns no longer parse
- Trait function parameters with arbitrary patterns parse
- Trait function parameters without idents/patterns no longer parse
- `fn(...)` parameters no longer parse with patterns other than a single ident

1 files changed, 2 insertions, 2 deletions

diff --git a/crates/ra_parser/src/grammar/paths.rs b/crates/ra_parser/src/grammar/paths.rs
index ca8e075a1..186064320 100644
--- a/crates/ra_parser/src/grammar/paths.rs
+++ b/crates/ra_parser/src/grammar/paths.rs
@@ -97,9 +97,9 @@ fn opt_path_type_args(p: &mut Parser, mode: Mode) {
         Mode::Use => return,
         Mode::Type => {
             // test path_fn_trait_args
-            // type F = Box<Fn(x: i32) -> ()>;
+            // type F = Box<Fn(i32) -> ()>;
             if p.at(T!['(']) {
-                params::param_list_opt_patterns(p);
+                params::param_list_impl_fn(p);
                 opt_fn_ret_type(p);
             } else {
                 type_args::opt_type_arg_list(p, false)