mesh_protobuf/table/
tuple.rs

1// Copyright (c) Microsoft Corporation.
2// Licensed under the MIT License.
3
4//! Table definitions for tuples.
5
6use super::StructMetadata;
7use super::TableEncoder;
8use super::decode::ErasedDecoderEntry;
9use super::decode::StructDecodeMetadata;
10use super::encode::ErasedEncoderEntry;
11use super::encode::StructEncodeMetadata;
12use crate::DefaultEncoding;
13use crate::FieldDecode;
14use crate::FieldEncode;
15use crate::protofile::DescribeField;
16use crate::protofile::DescribeMessage;
17use crate::protofile::FieldType;
18use crate::protofile::MessageDescription;
19
20impl DescribeMessage<()> for TableEncoder {
21    const DESCRIPTION: MessageDescription<'static> = MessageDescription::External {
22        name: "google.protobuf.Empty",
23        import_path: "google/protobuf/empty.proto",
24    };
25}
26
27macro_rules! tuplegen {
28    { $(
29        ($count:expr, $( ($t:ident, $e:ident, $u:ident, $n:tt) ),*  $(,)?)
30        ),* $(,)?
31    } => {
32        $(
33        // SAFETY: macro caller ensures all fields are described.
34        unsafe impl<'a, $($t,)*> StructMetadata for ($($t,)*) {
35            const NUMBERS: &'static [u32] = &[$($n + 1,)*];
36            const OFFSETS: &'static [usize] = &[$(core::mem::offset_of!(Self, $n),)*];
37        }
38
39        // SAFETY: macro caller ensures all fields are described.
40        unsafe impl<R, $($t,)*> StructEncodeMetadata<R> for ($($t,)*)
41        where
42            $($t: DefaultEncoding,)*
43            $($t::Encoding: FieldEncode<$t, R>,)*
44        {
45            const ENCODERS: &'static [ErasedEncoderEntry] = &[$(<$t::Encoding>::ENTRY.erase(),)*];
46        }
47
48        // SAFETY: macro caller ensures all fields are described.
49        unsafe impl<'de, R, $($t,)*> StructDecodeMetadata<'de, R> for ($($t,)*)
50        where
51            $($t: DefaultEncoding,)*
52            $($t::Encoding: FieldDecode<'de, $t, R>,)*
53        {
54            const DECODERS: &'static [ErasedDecoderEntry] = &[$(<$t::Encoding>::ENTRY.erase(),)*];
55        }
56
57        impl<$($t: DefaultEncoding,)*> DefaultEncoding for ($($t,)*) {
58            type Encoding = TableEncoder;
59        }
60
61        impl<$($t,)*> DescribeField<($($t,)*)> for TableEncoder
62        where
63            $($t: DefaultEncoding,)*
64            $($t::Encoding: DescribeField<$t>,)*
65        {
66            const FIELD_TYPE: FieldType<'static> = FieldType::tuple(&[$(<$t::Encoding as DescribeField<$t>>::FIELD_TYPE,)*]);
67        }
68        )*
69    };
70}
71
72tuplegen! {
73    (0, ),
74    (1, (E0, T0, U0, 0)),
75    (2, (E0, T0, U0, 0), (E1, T1, U1, 1)),
76    (3, (E0, T0, U0, 0), (E1, T1, U1, 1), (E2, T2, U2, 2)),
77    (4, (E0, T0, U0, 0), (E1, T1, U1, 1), (E2, T2, U2, 2), (E3, T3, U3, 3)),
78    (5, (E0, T0, U0, 0), (E1, T1, U1, 1), (E2, T2, U2, 2), (E3, T3, U3, 3), (E4, T4, U4, 4)),
79    (6, (E0, T0, U0, 0), (E1, T1, U1, 1), (E2, T2, U2, 2), (E3, T3, U3, 3), (E4, T4, U4, 4), (E5, T5, U5, 5)),
80    (7, (E0, T0, U0, 0), (E1, T1, U1, 1), (E2, T2, U2, 2), (E3, T3, U3, 3), (E4, T4, U4, 4), (E5, T5, U5, 5), (E6, T6, U6, 6)),
81}
mesh_protobuf/table/tuple.rs

mesh_protobuf/table/
tuple.rs
