bssl_macros/
lib.rs

1// Copyright 2026 The BoringSSL Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     https://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#![no_std]
16
17#[doc(hidden)]
18#[macro_export]
19macro_rules! bssl_enum {
20    (
21        $(#[$attr:meta])*
22        $vis:vis enum $name:ident : $repr:ty {
23            $(
24                $(#[$vattr:meta])*
25                $item:ident = $e:expr
26            ),* $(,)?
27        }
28    ) => {
29        $(#[$attr])*
30        #[repr($repr)]
31        $vis enum $name {
32            $(
33                $(#[$vattr])*
34                $item = $e,
35            )*
36        }
37
38        impl ::core::convert::TryFrom<$repr> for $name {
39            type Error = $repr;
40
41            fn try_from(value: $repr) -> Result<Self, Self::Error> {
42                $(
43                    #[allow(non_upper_case_globals)]
44                    const $item: $repr = $e;
45                )*
46
47                #[allow(non_upper_case_globals)]
48                match value {
49                    $(
50                        $item => ::core::result::Result::Ok(Self::$item),
51                    )*
52                    _ => ::core::result::Result::Err(value),
53                }
54            }
55        }
56    };
57}
bssl_macros/lib.rs

bssl_macros/
lib.rs
