mysql_common/
bitflags_ext.rs

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1// Copyright (c) 2021 Anatoly Ikorsky
2//
3// Licensed under the Apache License, Version 2.0
4// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT
5// license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
6// option. All files in the project carrying such notice may not be copied,
7// modified, or distributed except according to those terms.
8
9/// It's a wrapper for `bitflags::bitflags!` macro that also implements the `Bitflags` trait.
10macro_rules! my_bitflags {
11    ($name:ident, $(#[$em:meta])+ $err:ident, $ty:path, $($def:tt)*) => {
12        #[derive(Debug, Clone, Copy, Eq, PartialEq, Hash, thiserror::Error)]
13        $(#[$em])+
14        pub struct $err(pub $ty);
15
16        impl TryFrom<$ty> for $name {
17            type Error = $err;
18
19            fn try_from(val: $ty) -> std::result::Result<$name, $err> {
20                $name::from_bits(val).ok_or_else(|| $err(val))
21            }
22        }
23
24        impl From<$name> for $ty {
25            fn from(val: $name) -> $ty {
26                val.bits()
27            }
28        }
29
30        impl Default for $name {
31            fn default() -> $name {
32                $name::empty()
33            }
34        }
35
36        bitflags::bitflags! { $($def)* }
37    };
38}
mysql_common/bitflags_ext.rs

mysql_common/
bitflags_ext.rs
