convert-chainA tiny crate for chain type converter. There is only one macro convert-chian in it. You can use it to directly convert an expression or create a closure for the convert.
```rust struct A; struct B; struct C;
impl From for A { ... }
impl From
rust
let c = C;
let a = convert_chain!(c; B, A);
rust
let c = C;
let f = convert_chain!(B, A);
let a = f(c);