common_primitives/
macros.rs

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// This file is part of Substrate.

// Copyright (C) 2022 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed 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.

// macro_rules! impl_incrementable {
// 	($($type:ty),+) => {
// 		$(
// 			impl Incrementable for $type {
// 				fn increment(&self) -> Self {
// 					let mut val = self.clone();
// 					val.saturating_inc();
// 					val
// 				}
//
// 				fn initial_value() -> Self {
// 					0
// 				}
// 			}
// 		)+
// 	};
// }
// pub(crate) use impl_incrementable;
#[macro_export]
#[doc(hidden)]
macro_rules! impl_codec_bitflags {
	($wrapper:ty, $size:ty, $bitflag_enum:ty) => {
		impl MaxEncodedLen for $wrapper {
			fn max_encoded_len() -> usize {
				<$size>::max_encoded_len()
			}
		}
		impl Encode for $wrapper {
			fn using_encoded<R, F: FnOnce(&[u8]) -> R>(&self, f: F) -> R {
				self.0.bits().using_encoded(f)
			}
		}
		impl EncodeLike for $wrapper {}
		impl Decode for $wrapper {
			fn decode<I: parity_scale_codec::Input>(
				input: &mut I,
			) -> core::result::Result<Self, parity_scale_codec::Error> {
				let field = <$size>::decode(input)?;
				Ok(Self(BitFlags::from_bits(field as $size).map_err(|_| "invalid value")?))
			}
		}

		impl TypeInfo for $wrapper {
			type Identity = Self;

			fn type_info() -> Type {
				Type::builder()
					.path(Path::new("BitFlags", module_path!()))
					.type_params(vec![TypeParameter::new("T", Some(meta_type::<$bitflag_enum>()))])
					.composite(
						Fields::unnamed()
							.field(|f| f.ty::<$size>().type_name(stringify!($bitflag_enum))),
					)
			}
		}
	};
}
// pub(crate) use impl_codec_bitflags;