light_clone 0.4.1

Compile-time enforcement for O(1) clone operations
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75

use crate::LightClone;
use std::any::TypeId;
use std::marker::PhantomPinned;
use std::net::{Ipv4Addr, Ipv6Addr, SocketAddrV4, SocketAddrV6};
use std::num::{
    NonZeroI128, NonZeroI16, NonZeroI32, NonZeroI64, NonZeroI8, NonZeroIsize, NonZeroU128,
    NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize,
};
use std::thread::ThreadId;
use std::time::{Duration, Instant, SystemTime};

/// Macro to implement LightClone for types.
/// With the marker trait pattern, all impls are empty - the default impl calls `clone()`.
macro_rules! impl_light_clone {
    ($($t:ty),* $(,)?) => {
        $(
            impl LightClone for $t {}
        )*
    };
}

impl_light_clone!(
    // Primitives
    i8,
    i16,
    i32,
    i64,
    i128,
    isize,
    u8,
    u16,
    u32,
    u64,
    u128,
    usize,
    f32,
    f64,
    bool,
    char,
    // NonZero types
    NonZeroI8,
    NonZeroI16,
    NonZeroI32,
    NonZeroI64,
    NonZeroI128,
    NonZeroIsize,
    NonZeroU8,
    NonZeroU16,
    NonZeroU32,
    NonZeroU64,
    NonZeroU128,
    NonZeroUsize,
    // Time types
    Duration,
    Instant,
    SystemTime,
    // Type identity
    TypeId,
    // Marker types
    PhantomPinned,
    // Network types
    Ipv4Addr,
    Ipv6Addr,
    SocketAddrV4,
    SocketAddrV6,
    // Thread types
    ThreadId,
);

// Shared references are Copy types
impl<T: ?Sized> LightClone for &T {}

// Raw pointers are Copy types
impl<T: ?Sized> LightClone for *const T {}
impl<T: ?Sized> LightClone for *mut T {}