cargo-expand 0.1.3

# cargo-expand

[![Build Status](https://travis-ci.org/dtolnay/cargo-expand.svg?branch=master)](https://travis-ci.org/dtolnay/cargo-expand)
[![Latest Version](https://img.shields.io/crates/v/cargo-expand.svg)](https://crates.io/crates/cargo-expand)

This is a wrapper around `cargo rustc -- --pretty=expanded`. Once installed, the
command `cargo expand` prints out the result of macro expansion and `#[derive]`
expansion applied to the current crate.

## Installation

Install with `cargo install cargo-expand`.

This command optionally uses
[`rustfmt`](https://github.com/rust-lang-nursery/rustfmt)
to format the expanded output. If `rustfmt` is not available, the expanded code
is not formatted. Install `rustfmt` with `cargo install rustfmt`.

## Example

`$ cat src/main.rs`

> ```rust
fn main() {
    println!("Hello, world!");
}
```

`$ cargo expand`

> ```rust
#![feature(prelude_import)]
#![no_std]
#[prelude_import]
use std::prelude::v1::*;
#[macro_use]
extern crate std as std;
fn main() {
    ::std::io::_print(::std::fmt::Arguments::new_v1({
                                                        static __STATIC_FMTSTR:
                                                               &'static [&'static str]
                                                               =
                                                            &["Hello, world!\n"];
                                                        __STATIC_FMTSTR
                                                    },
                                                    &match () {
                                                        () => [],
                                                    }));
}
```

Or to expand a particular test target:

`$ cargo expand --test test_something`

## License

Licensed under either of

 * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
 * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)

at your option.

### Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in cargo-expand by you, as defined in the Apache-2.0 license,
shall be dual licensed as above, without any additional terms or conditions.