Type Dispatch

Macros for dispatching based on generic types.

Usage

```rust struct GenericStruct(A, B);

// Creates 4 trait implementations.

[impl_dispatch({u64; u16}, {u32, usize; u8, u64})]

impl Into for GenericStruct { fn into(self) -> C { self.0 as C + self.1 as C + dispatchtype!( match A, B { u64, u32 => 0..self.1, u64, u8 => vec![self.0 + self.1 as u64], u16, u32 => "ABC".tostring(), u16, u8 => "ABCD", }
).len() as C } }

let x: usize = GenericStruct(1u64, 3u32).into(); asserteq!(x, 7); let x: u64 = GenericStruct(1u64, 3u8).into(); asserteq!(x, 5); let x: usize = GenericStruct(1u16, 3u32).into(); asserteq!(x, 7); let x: u64 = GenericStruct(1u16, 3u8).into(); asserteq!(x, 8); ```