clay_core/shape/
select.rs

1/// The macro for making a union of shapes.
2///
3/// You can read more about the technique [here](https://clay-rs.github.io/knowledge/#objects).
4#[macro_export]
5macro_rules! shape_select {
6    ( $Select:ident { $( $Enum:ident ( $Param:ident = $Shape:ty ) ),+ $(,)? } ) => {
7        $crate::instance_select!(
8            $Select: $crate::shape::Shape: $crate::shape::ShapeClass {
9                $( $Enum($Param = $Shape) ),+
10            }
11        );
12        impl $crate::shape::Shape for $Select {}
13        
14        impl<
15            B_: $crate::shape::Bound,
16            $(
17                $Param: 
18                    $crate::shape::Shape +
19                    $crate::shape::Bounded<B_>
20            ),+
21        > $crate::shape::Bounded<B_> for $Select<
22            $( $Param ),+
23        > {
24            fn bound(&self) -> Option<B_> {
25                match self {
26                    $( $Select::$Enum(x) => x.bound(), )+
27                }
28            }
29        }
30    };
31}
32
33#[cfg(test)]
34mod check {
35    use crate::{
36        shape::test::TestShape,
37        shape_select,
38    };
39
40    shape_select!(
41        TestShapeSelect {
42            Shape1(T1 = TestShape<i32>),
43            Shape2(T2 = TestShape<f32>),
44        }
45    );
46}
clay_core/shape/select.rs

clay_core/shape/
select.rs
