polars_utils/
nulls.rs

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1pub trait IsNull {
2    const HAS_NULLS: bool;
3    type Inner;
4
5    fn is_null(&self) -> bool;
6
7    fn unwrap_inner(self) -> Self::Inner;
8}
9
10impl<T> IsNull for Option<T> {
11    const HAS_NULLS: bool = true;
12    type Inner = T;
13
14    #[inline(always)]
15    fn is_null(&self) -> bool {
16        self.is_none()
17    }
18
19    #[inline(always)]
20    fn unwrap_inner(self) -> Self::Inner {
21        Option::unwrap(self)
22    }
23}
24
25macro_rules! impl_is_null (
26    ($($ty:tt)*) => {
27        impl IsNull for $($ty)* {
28            const HAS_NULLS: bool = false;
29            type Inner = $($ty)*;
30
31
32            #[inline(always)]
33            fn is_null(&self) -> bool {
34                false
35            }
36
37            #[inline(always)]
38            fn unwrap_inner(self) -> $($ty)* {
39                self
40            }
41        }
42    };
43);
44
45impl_is_null!(bool);
46impl_is_null!(f32);
47impl_is_null!(f64);
48impl_is_null!(i8);
49impl_is_null!(i16);
50impl_is_null!(i32);
51impl_is_null!(i64);
52impl_is_null!(i128);
53impl_is_null!(u8);
54impl_is_null!(u16);
55impl_is_null!(u32);
56impl_is_null!(u64);
57impl_is_null!(u128);
58
59impl<'a> IsNull for &'a [u8] {
60    const HAS_NULLS: bool = false;
61    type Inner = &'a [u8];
62
63    #[inline(always)]
64    fn is_null(&self) -> bool {
65        false
66    }
67
68    #[inline(always)]
69    fn unwrap_inner(self) -> Self::Inner {
70        self
71    }
72}
73
74impl<'a, T: IsNull + ?Sized> IsNull for &'a T {
75    const HAS_NULLS: bool = false;
76    type Inner = &'a T;
77
78    fn is_null(&self) -> bool {
79        (*self).is_null()
80    }
81
82    fn unwrap_inner(self) -> Self::Inner {
83        self
84    }
85}
polars_utils/nulls.rs

polars_utils/
nulls.rs
