1 unstable release
0.0.0 | Aug 5, 2023 |
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#54 in #dispatch
Used in type_dispatch
20KB
327 lines
Type Dispatch
Macros for dispatching based on generic types.
Usage
struct GenericStruct<A, B>(A, B);
// Creates 4 trait implementations.
#[impl_dispatch({u64; u16}, {u32, usize; u8, u64})]
impl<A, B, C> Into<C> for GenericStruct<A, B> {
fn into(self) -> C {
self.0 as C + self.1 as C + dispatch_type!(
match A, B {
u64, u32 => 0..self.1,
u64, u8 => vec![self.0 + self.1 as u64],
u16, u32 => "ABC".to_string(),
u16, u8 => "ABCD",
}
).len() as C
}
}
let x: usize = GenericStruct(1u64, 3u32).into();
assert_eq!(x, 7);
let x: u64 = GenericStruct(1u64, 3u8).into();
assert_eq!(x, 5);
let x: usize = GenericStruct(1u16, 3u32).into();
assert_eq!(x, 7);
let x: u64 = GenericStruct(1u16, 3u8).into();
assert_eq!(x, 8);
lib.rs
:
Macros for dispatching based on generic types.
Dependencies
~3.5MB
~74K SLoC