pyo3/tests/ui/invalid_pyfunctions.stderr

error: Python functions cannot have generic type parameters
 --> tests/ui/invalid_pyfunctions.rs:4:21
  |
4 | fn generic_function<T>(value: T) {}
  |                     ^

error: Python functions cannot have `impl Trait` arguments
 --> tests/ui/invalid_pyfunctions.rs:7:36
  |
7 | fn impl_trait_function(impl_trait: impl AsRef<PyAny>) {}
  |                                    ^^^^

error: `async fn` is not yet supported for Python functions.

       Additional crates such as `pyo3-asyncio` can be used to integrate async Rust and Python. For more information, see https://github.com/PyO3/pyo3/issues/1632
  --> tests/ui/invalid_pyfunctions.rs:10:1
   |
10 | async fn async_function() {}
   | ^^^^^

error: wildcard argument names are not supported
  --> tests/ui/invalid_pyfunctions.rs:13:22
   |
13 | fn wildcard_argument(_: i32) {}
   |                      ^

error: destructuring in arguments is not supported
  --> tests/ui/invalid_pyfunctions.rs:16:26
   |
16 | fn destructured_argument((a, b): (i32, i32)) {}
   |                          ^^^^^^

error: required arguments after an `Option<_>` argument are ambiguous
       = help: add a `#[pyo3(signature)]` annotation on this function to unambiguously specify the default values for all optional parameters
  --> tests/ui/invalid_pyfunctions.rs:19:63
   |
19 | fn function_with_required_after_option(_opt: Option<i32>, _x: i32) {}
   |                                                               ^^^