fix (rust): add a negative lookahead for destructuring in function arguments to better capture complex function signatures

Author: bionicles

.mcp_server.pid

@@ -0,0 +1 @@
+4104940

tests/more_languages/group4/rust_test.rs

@@ -229,4 +229,12 @@ fn encode_pipeline(cmds: &[Cmd], atomic: bool) -> Vec<u8> {
     let mut rv = vec![];
     write_pipeline(&mut rv, cmds, atomic);
     rv
+}
+
+pub async fn handle_post_yeet(
+    State(auth_backend): State<AuthBackend>,
+    Session { maybe_claims }: Session,
+    Form(yeet_form): Form<YeetForm>,
+) -> Result<Response, AuthError> {
+    println!("yeet yeet!")
 }

tests/test_more_language_units.py

@@ -1314,6 +1314,11 @@ def test_more_languages_group3(file: str, expected: List[str]):
     }): Path<RouteParams>,
 ) -> ServerResult<Response>""",
                 "fn encode_pipeline(cmds: &[Cmd], atomic: bool) -> Vec<u8>",
+                """pub async fn handle_post_yeet(
+    State(auth_backend): State<AuthBackend>,
+    Session { maybe_claims }: Session,
+    Form(yeet_form): Form<YeetForm>,
+) -> Result<Response, AuthError>""",
             ],
         ),
         (

tree_plus_src/parse_file.py

@@ -1212,7 +1212,7 @@ def parse_rs(
 
     combined_pattern = regex.compile(
         # functions
-        r"^(?P<function>\s*(?P<maybe_pub>pub\s+?)?(?P<maybe_async_or_const>(?:async|const)\s+)?(?P<fn>fn)\s+(?P<fn_name>\w+)(?P<generics><[^>]*?>)?(?P<argument_start>\()(?P<arguments>[&\w,':[\]()<>${}\/\s]+?)?(?P<argument_end>\))[\s\S]*?)(?P<end>(?:;\s)|(?:{))|"
+        r"^(?P<function>\s*(?P<maybe_pub>pub\s+?)?(?P<maybe_async_or_const>(?:async|const)\s+)?(?P<fn>fn)\s+(?P<fn_name>\w+)(?P<generics><[^>]*?>)?(?P<argument_start>\()(?P<arguments>[&\w,':[\]()<>${}\/\s]+?)?(?P<argument_end>\)(?!:))[\s\S]*?)(?P<end>(?:;\s)|(?:{))|"
         # structs and impls with generics
         r"\n(?P<struct_impl>(?: *((?:pub\s+)?struct)|impl)[^{;]*?) ?[{;]|"
         # enum with variants