delegatemethod 0.2.1

# delegatemethod-rs
Delegate method calls to a field.

## What's new in 0.2.0
A total rearrange of code.

Now we support generic parameters of methods. 

This comes at the price that now we generate the whole impl instead of impl items.

You have to put the whole impl inside the macro now.

## Examples
Suppose you have a struct called `Inner`, with methods `fn1` and `fn2`.

You have another struct called `Outer` with fields using `Inner` as type.

You can use `delegate_method` to forward some method implementations to the fields.

```rust
    #[derive(Copy, Clone)]
    struct Outer {
        inner1: Inner,
        inner2: Inner,
    }

    delegate_method! {
        impl Outer {
            // the <as FieldType> is optional below
            // it is only used for methods without self or &self or &mut self argument
            inner as Inner:
            pub fn fn1();
            
            // here comes another group, using another field.
            inner2 as Inner:
            pub fn fn2() -> usize;
        }
    }
```

## Acknowledgements
* The idea comes from [Tommy McGuire's blog](http://maniagnosis.crsr.net/2016/01/another-rust-spot-delegation.html),
but adjusted to match the Rust syntax better.