repr_offset/
for_examples_inner.rs

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1#![allow(missing_docs)]
2
3use crate::{Aligned, Unaligned};
4
5macro_rules! declare_example_struct {
6    (
7        $(#[$meta:meta])*
8        struct $name:ident;
9        alignment =  $alignment:ty,
10        $(impl_GetFieldOffset = $impl_gdo:ident,)?
11    ) => {
12        $(#[$meta])*
13        #[derive(Default)]
14        pub struct $name<A = (),B = (),C = (),D = ()>{
15            pub a:A,
16            pub b:B,
17            pub c:C,
18            pub d:D,
19        }
20
21        impl<A,B,C,D> Copy for $name<A,B,C,D>
22        where
23            A: Copy,
24            B: Copy,
25            C: Copy,
26            D: Copy,
27        {}
28
29        impl<A,B,C,D> Clone for $name<A,B,C,D>
30        where
31            A: Copy,
32            B: Copy,
33            C: Copy,
34            D: Copy,
35        {
36            fn clone(&self)->Self{
37                *self
38            }
39        }
40
41        unsafe_struct_field_offsets!{
42            alignment =  $alignment,
43            $(impl_GetFieldOffset = $impl_gdo,)?
44            impl[A,B,C,D] $name<A,B,C,D>{
45                /// The offset of the `a` field
46                pub const OFFSET_A, a: A;
47                /// The offset of the `b` field
48                pub const OFFSET_B, b: B;
49                /// The offset of the `c` field
50                pub const OFFSET_C, c: C;
51                /// The offset of the `d` field
52                pub const OFFSET_D, d: D;
53            }
54        }
55    };
56}
57
58declare_example_struct! {
59    /// An example `#[repr(C)]` type
60    #[repr(C)]
61    struct ReprC;
62    alignment = Aligned,
63}
64
65declare_example_struct! {
66    /// An example `#[repr(C)]` type which doesn't implement [`GetFieldOffset`]
67    ///
68    /// [`GetFieldOffset`]: ../get_field_offset/trait.GetFieldOffset.html
69    #[repr(C)]
70    struct ReprCNoGFO;
71    alignment = Aligned,
72    impl_GetFieldOffset = false,
73}
74
75declare_example_struct! {
76    /// An example `#[repr(C, align(4))]` type
77    #[repr(C, align(4))]
78    struct ReprAlign4;
79    alignment = Aligned,
80}
81
82declare_example_struct! {
83    /// An example `#[repr(C, packed)]` type
84    #[repr(C, packed)]
85    struct ReprPacked;
86    alignment = Unaligned,
87}
88
89declare_example_struct! {
90    /// An example `#[repr(C, packed(2))]` type.
91    #[repr(C, packed(2))]
92    struct ReprPacked2;
93    alignment = Unaligned,
94}
repr_offset/for_examples_inner.rs

repr_offset/
for_examples_inner.rs
