| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License.. |
| |
| use syn::{self}; |
| |
| macro_rules! path { |
| ($($path:tt)+) => { |
| syn::parse_path(stringify!($($path)+)).unwrap() |
| }; |
| } |
| |
| // Remove the default from every type parameter because in the generated impls |
| // they look like associated types: "error: associated type bindings are not |
| // allowed here". |
| pub fn without_defaults(generics: &syn::Generics) -> syn::Generics { |
| syn::Generics { |
| ty_params: generics |
| .ty_params |
| .iter() |
| .map( |
| |ty_param| { |
| syn::TyParam { |
| default: None, |
| ..ty_param.clone() |
| } |
| }, |
| ) |
| .collect(), |
| ..generics.clone() |
| } |
| } |