facet_trait/impls/
scalar_impls.rs

1use crate::value_vtable;
2use crate::*;
3use std::alloc::Layout;
4use std::borrow::Cow;
5
6unsafe impl Facet for () {
7    const DUMMY: Self = ();
8    const SHAPE: &'static Shape = &const {
9        Shape {
10            layout: Layout::new::<Self>(),
11            def: Def::Scalar(ScalarDef::of::<Self>()),
12            vtable: value_vtable!((), |f, _opts| write!(f, "()")),
13        }
14    };
15}
16
17unsafe impl Facet for String {
18    const DUMMY: Self = String::new();
19    const SHAPE: &'static Shape = &Shape {
20        layout: Layout::new::<Self>(),
21        def: Def::Scalar(ScalarDef::of::<Self>()),
22        vtable: value_vtable!(String, |f, _opts| write!(f, "String")),
23    };
24}
25
26unsafe impl Facet for &str {
27    const DUMMY: Self = "";
28    const SHAPE: &'static Shape = &Shape {
29        layout: Layout::new::<Self>(),
30        def: Def::Scalar(ScalarDef::of::<Self>()),
31        vtable: value_vtable!(&str, |f, _opts| write!(f, "&str")),
32    };
33}
34
35unsafe impl Facet for Cow<'_, str> {
36    const DUMMY: Self = Cow::Borrowed("");
37    const SHAPE: &'static Shape = &Shape {
38        layout: Layout::new::<Self>(),
39        def: Def::Scalar(ScalarDef::of::<Self>()),
40        vtable: value_vtable!(Cow<'_, str>, |f, _opts| write!(f, "Cow<'_, str>")),
41    };
42}
43
44unsafe impl Facet for bool {
45    const DUMMY: Self = false;
46    const SHAPE: &'static Shape = &Shape {
47        layout: Layout::new::<Self>(),
48        def: Def::Scalar(ScalarDef::of::<Self>()),
49        vtable: value_vtable!(bool, |f, _opts| write!(f, "bool")),
50    };
51}
52
53macro_rules! impl_facet_for_integer {
54    ($type:ty) => {
55        unsafe impl Facet for $type {
56            const DUMMY: Self = 0;
57            const SHAPE: &'static Shape = &Shape {
58                layout: Layout::new::<Self>(),
59                def: Def::Scalar(ScalarDef::of::<Self>()),
60                vtable: value_vtable!($type, |f, _opts| write!(f, stringify!($type))),
61            };
62        }
63    };
64}
65
66impl_facet_for_integer!(u8);
67impl_facet_for_integer!(i8);
68impl_facet_for_integer!(u16);
69impl_facet_for_integer!(i16);
70impl_facet_for_integer!(u32);
71impl_facet_for_integer!(i32);
72impl_facet_for_integer!(u64);
73impl_facet_for_integer!(i64);
74impl_facet_for_integer!(u128);
75impl_facet_for_integer!(i128);
76
77macro_rules! impl_facet_for_float {
78    ($type:ty) => {
79        unsafe impl Facet for $type {
80            const DUMMY: Self = 0.0;
81            const SHAPE: &'static Shape = &Shape {
82                layout: Layout::new::<Self>(),
83                def: Def::Scalar(ScalarDef::of::<Self>()),
84                vtable: value_vtable!($type, |f, _opts| write!(f, stringify!($type))),
85            };
86        }
87    };
88}
89
90impl_facet_for_float!(f32);
91impl_facet_for_float!(f64);
facet_trait/impls/scalar_impls.rs

facet_trait/impls/
scalar_impls.rs
