core/
internal_macros.rs

1// implements the unary operator "op &T"
2// based on "op T" where T is expected to be `Copy`able
3macro_rules! forward_ref_unop {
4    (impl $imp:ident, $method:ident for $t:ty, $(#[$attr:meta])+) => {
5        $(#[$attr])+
6        impl const $imp for &$t {
7            type Output = <$t as $imp>::Output;
8
9            #[inline]
10            fn $method(self) -> <$t as $imp>::Output {
11                $imp::$method(*self)
12            }
13        }
14    }
15}
16
17// implements binary operators "&T op U", "T op &U", "&T op &U"
18// based on "T op U" where T and U are expected to be `Copy`able
19macro_rules! forward_ref_binop {
20    (impl $imp:ident, $method:ident for $t:ty, $u:ty, $(#[$attr:meta])+) => {
21        $(#[$attr])+
22        impl const $imp<$u> for &$t {
23            type Output = <$t as $imp<$u>>::Output;
24
25            #[inline]
26            #[track_caller]
27            fn $method(self, other: $u) -> <$t as $imp<$u>>::Output {
28                $imp::$method(*self, other)
29            }
30        }
31
32        $(#[$attr])+
33        impl const $imp<&$u> for $t {
34            type Output = <$t as $imp<$u>>::Output;
35
36            #[inline]
37            #[track_caller]
38            fn $method(self, other: &$u) -> <$t as $imp<$u>>::Output {
39                $imp::$method(self, *other)
40            }
41        }
42
43        $(#[$attr])+
44        impl const $imp<&$u> for &$t {
45            type Output = <$t as $imp<$u>>::Output;
46
47            #[inline]
48            #[track_caller]
49            fn $method(self, other: &$u) -> <$t as $imp<$u>>::Output {
50                $imp::$method(*self, *other)
51            }
52        }
53    }
54}
55
56// implements "T op= &U", based on "T op= U"
57// where U is expected to be `Copy`able
58macro_rules! forward_ref_op_assign {
59    (impl $imp:ident, $method:ident for $t:ty, $u:ty, $(#[$attr:meta])+) => {
60        $(#[$attr])+
61        impl const $imp<&$u> for $t {
62            #[inline]
63            #[track_caller]
64            fn $method(&mut self, other: &$u) {
65                $imp::$method(self, *other);
66            }
67        }
68    }
69}
70
71/// Creates a zero-size type similar to a closure type, but named.
72macro_rules! impl_fn_for_zst {
73    ($(
74        $( #[$attr: meta] )*
75        struct $Name: ident impl$( <$( $lifetime : lifetime ),+> )? Fn =
76            |$( $arg: ident: $ArgTy: ty ),*| -> $ReturnTy: ty
77            $body: block;
78    )+) => {
79        $(
80            $( #[$attr] )*
81            struct $Name;
82
83            impl $( <$( $lifetime ),+> )? Fn<($( $ArgTy, )*)> for $Name {
84                #[inline]
85                extern "rust-call" fn call(&self, ($( $arg, )*): ($( $ArgTy, )*)) -> $ReturnTy {
86                    $body
87                }
88            }
89
90            impl $( <$( $lifetime ),+> )? FnMut<($( $ArgTy, )*)> for $Name {
91                #[inline]
92                extern "rust-call" fn call_mut(
93                    &mut self,
94                    ($( $arg, )*): ($( $ArgTy, )*)
95                ) -> $ReturnTy {
96                    Fn::call(&*self, ($( $arg, )*))
97                }
98            }
99
100            impl $( <$( $lifetime ),+> )? FnOnce<($( $ArgTy, )*)> for $Name {
101                type Output = $ReturnTy;
102
103                #[inline]
104                extern "rust-call" fn call_once(self, ($( $arg, )*): ($( $ArgTy, )*)) -> $ReturnTy {
105                    Fn::call(&self, ($( $arg, )*))
106                }
107            }
108        )+
109    }
110}
core/internal_macros.rs

core/
internal_macros.rs
