toasty_core/stmt/
order_by.rs

1use super::OrderByExpr;
2
3/// An `ORDER BY` clause containing one or more ordering expressions.
4///
5/// # Examples
6///
7/// ```ignore
8/// use toasty_core::stmt::{OrderBy, OrderByExpr, Direction, Expr};
9///
10/// let order = OrderBy {
11///     exprs: vec![OrderByExpr {
12///         expr: Expr::null(),
13///         order: Some(Direction::Asc),
14///     }],
15/// };
16/// ```
17#[derive(Debug, Clone, PartialEq)]
18pub struct OrderBy {
19    /// The list of ordering expressions, applied in order.
20    pub exprs: Vec<OrderByExpr>,
21}
22
23impl OrderBy {
24    /// Flips the direction of each [`OrderByExpr`] that makes up this [`OrderBy`].
25    pub fn reverse(&mut self) {
26        for expr in &mut self.exprs {
27            expr.reverse();
28        }
29    }
30}
31
32impl From<OrderByExpr> for OrderBy {
33    fn from(value: OrderByExpr) -> Self {
34        Self { exprs: vec![value] }
35    }
36}
37
38macro_rules! impl_for_tuple {
39    ( $(($T:ident, $idx:tt)),+ ) => {
40        impl<$($T),+> From<($($T,)+)> for OrderBy
41        where
42            $($T: Into<OrderByExpr>,)+
43        {
44            fn from(src: ($($T,)+)) -> Self {
45                Self {
46                    exprs: vec![$(src.$idx.into()),+],
47                }
48            }
49        }
50    };
51}
52
53impl_for_tuple!((T0, 0), (T1, 1));
54impl_for_tuple!((T0, 0), (T1, 1), (T2, 2));
55impl_for_tuple!((T0, 0), (T1, 1), (T2, 2), (T3, 3));
56impl_for_tuple!((T0, 0), (T1, 1), (T2, 2), (T3, 3), (T4, 4));
57impl_for_tuple!((T0, 0), (T1, 1), (T2, 2), (T3, 3), (T4, 4), (T5, 5));
58impl_for_tuple!(
59    (T0, 0),
60    (T1, 1),
61    (T2, 2),
62    (T3, 3),
63    (T4, 4),
64    (T5, 5),
65    (T6, 6)
66);
67impl_for_tuple!(
68    (T0, 0),
69    (T1, 1),
70    (T2, 2),
71    (T3, 3),
72    (T4, 4),
73    (T5, 5),
74    (T6, 6),
75    (T7, 7)
76);
77impl_for_tuple!(
78    (T0, 0),
79    (T1, 1),
80    (T2, 2),
81    (T3, 3),
82    (T4, 4),
83    (T5, 5),
84    (T6, 6),
85    (T7, 7),
86    (T8, 8)
87);
88impl_for_tuple!(
89    (T0, 0),
90    (T1, 1),
91    (T2, 2),
92    (T3, 3),
93    (T4, 4),
94    (T5, 5),
95    (T6, 6),
96    (T7, 7),
97    (T8, 8),
98    (T9, 9)
99);
100impl_for_tuple!(
101    (T0, 0),
102    (T1, 1),
103    (T2, 2),
104    (T3, 3),
105    (T4, 4),
106    (T5, 5),
107    (T6, 6),
108    (T7, 7),
109    (T8, 8),
110    (T9, 9),
111    (T10, 10)
112);
113impl_for_tuple!(
114    (T0, 0),
115    (T1, 1),
116    (T2, 2),
117    (T3, 3),
118    (T4, 4),
119    (T5, 5),
120    (T6, 6),
121    (T7, 7),
122    (T8, 8),
123    (T9, 9),
124    (T10, 10),
125    (T11, 11)
126);
toasty_core/stmt/order_by.rs

toasty_core/stmt/
order_by.rs
