sgx_serialize_derive/src/bound.rs

// 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()
    }
}