common_primitives/
macros.rs

1// This file is part of Substrate.
2
3// Copyright (C) 2022 Parity Technologies (UK) Ltd.
4// SPDX-License-Identifier: Apache-2.0
5
6// Licensed under the Apache License, Version 2.0 (the "License");
7// you may not use this file except in compliance with the License.
8// You may obtain a copy of the License at
9//
10// 	http://www.apache.org/licenses/LICENSE-2.0
11//
12// Unless required by applicable law or agreed to in writing, software
13// distributed under the License is distributed on an "AS IS" BASIS,
14// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15// See the License for the specific language governing permissions and
16// limitations under the License.
17
18// macro_rules! impl_incrementable {
19// 	($($type:ty),+) => {
20// 		$(
21// 			impl Incrementable for $type {
22// 				fn increment(&self) -> Self {
23// 					let mut val = self.clone();
24// 					val.saturating_inc();
25// 					val
26// 				}
27//
28// 				fn initial_value() -> Self {
29// 					0
30// 				}
31// 			}
32// 		)+
33// 	};
34// }
35// pub(crate) use impl_incrementable;
36#[macro_export]
37#[doc(hidden)]
38macro_rules! impl_codec_bitflags {
39	($wrapper:ty, $size:ty, $bitflag_enum:ty) => {
40		impl MaxEncodedLen for $wrapper {
41			fn max_encoded_len() -> usize {
42				<$size>::max_encoded_len()
43			}
44		}
45		impl Encode for $wrapper {
46			fn using_encoded<R, F: FnOnce(&[u8]) -> R>(&self, f: F) -> R {
47				self.0.bits().using_encoded(f)
48			}
49		}
50		impl EncodeLike for $wrapper {}
51		impl Decode for $wrapper {
52			fn decode<I: parity_scale_codec::Input>(
53				input: &mut I,
54			) -> core::result::Result<Self, parity_scale_codec::Error> {
55				let field = <$size>::decode(input)?;
56				Ok(Self(BitFlags::from_bits(field as $size).map_err(|_| "invalid value")?))
57			}
58		}
59
60		impl TypeInfo for $wrapper {
61			type Identity = Self;
62
63			fn type_info() -> Type {
64				Type::builder()
65					.path(Path::new("BitFlags", module_path!()))
66					.type_params(vec![TypeParameter::new("T", Some(meta_type::<$bitflag_enum>()))])
67					.composite(
68						Fields::unnamed()
69							.field(|f| f.ty::<$size>().type_name(stringify!($bitflag_enum))),
70					)
71			}
72		}
73	};
74}
75// pub(crate) use impl_codec_bitflags;
common_primitives/macros.rs

common_primitives/
macros.rs
