diesel/macros/
internal.rs

1/// This will implement `SelectableExpression` and `AppearsOnTable` for "simple"
2/// composite nodes where the where clause is roughly `AllTyParams:
3/// SelectableExpression<QS>, Self: Expression`.
4///
5/// This macro is exported because we want to be able to call it from other
6/// macros that are exported, but it is not part of our public API.
7#[macro_export]
8#[doc(hidden)]
9macro_rules! impl_selectable_expression {
10    ($struct_name:ident) => {
11        $crate::impl_selectable_expression!(ty_params = (), struct_ty = $struct_name,);
12    };
13
14    ($struct_name:ident<$($ty_params:ident),+>) => {
15        $crate::impl_selectable_expression!(
16            ty_params = ($($ty_params),+),
17            struct_ty = $struct_name<$($ty_params),+>,
18        );
19    };
20
21    (ty_params = ($($ty_params:ident),*), struct_ty = $struct_ty:ty,) => {
22        impl<$($ty_params,)* QS> $crate::expression::SelectableExpression<QS>
23            for $struct_ty where
24                $struct_ty: $crate::expression::AppearsOnTable<QS>,
25                $($ty_params: $crate::expression::SelectableExpression<QS>,)*
26        {
27        }
28
29        impl<$($ty_params,)* QS> $crate::expression::AppearsOnTable<QS>
30            for $struct_ty where
31                $struct_ty: $crate::expression::Expression,
32                $($ty_params: $crate::expression::AppearsOnTable<QS>,)*
33        {
34        }
35    };
36}
37
38#[macro_export]
39#[doc(hidden)]
40#[cfg(feature = "custom-count-column-tables")]
41macro_rules! for_each_tuple {
42    ($callback:ident) => {
43        diesel_derives::__diesel_for_each_tuple!($callback, env!("DIESEL_MAX_COLUMN_COUNT"));
44    };
45    ($callback:ident, $size: expr) => {
46        diesel_derives::__diesel_for_each_tuple!($callback, $size);
47    };
48}
49
50#[macro_export]
51#[doc(hidden)]
52#[cfg(all(
53    not(feature = "custom-count-column-tables"),
54    feature = "128-column-tables"
55))]
56macro_rules! for_each_tuple {
57    ($callback:ident) => {
58        diesel_derives::__diesel_for_each_tuple!($callback, 128);
59    };
60    ($callback:ident, $size: expr) => {
61        diesel_derives::__diesel_for_each_tuple!($callback, $size);
62    };
63}
64
65#[macro_export]
66#[doc(hidden)]
67#[cfg(all(
68    not(feature = "custom-count-column-tables"),
69    not(feature = "128-column-tables"),
70    feature = "64-column-tables"
71))]
72macro_rules! for_each_tuple {
73    ($callback:ident) => {
74        diesel_derives::__diesel_for_each_tuple!($callback, 64);
75    };
76    ($callback:ident, $size: expr) => {
77        diesel_derives::__diesel_for_each_tuple!($callback, $size);
78    };
79}
80
81#[macro_export]
82#[doc(hidden)]
83#[cfg(all(
84    not(feature = "custom-count-column-tables"),
85    not(feature = "128-column-tables"),
86    not(feature = "64-column-tables"),
87    feature = "32-column-tables"
88))]
89macro_rules! for_each_tuple {
90    ($callback:ident) => {
91        diesel_derives::__diesel_for_each_tuple!($callback, 32);
92    };
93    ($callback:ident, $size: expr) => {
94        diesel_derives::__diesel_for_each_tuple!($callback, $size);
95    };
96}
97
98#[macro_export]
99#[doc(hidden)]
100#[cfg(all(
101    not(feature = "custom-count-column-tables"),
102    not(feature = "128-column-tables"),
103    not(feature = "64-column-tables"),
104    not(feature = "32-column-tables")
105))]
106macro_rules! for_each_tuple {
107    ($callback:ident) => {
108        diesel_derives::__diesel_for_each_tuple!($callback, 16);
109    };
110    ($callback:ident, $size: expr) => {
111        diesel_derives::__diesel_for_each_tuple!($callback, $size);
112    };
113}
diesel/macros/internal.rs

diesel/macros/
internal.rs
