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Include full cargo rustc command in readme

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David Tolnay 2018-07-01 22:06:22 -07:00
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[![Build Status](https://travis-ci.org/dtolnay/cargo-expand.svg?branch=master)](https://travis-ci.org/dtolnay/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) [![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 Once installed, the following command prints out the result of macro expansion
command `cargo expand` prints out the result of macro expansion and `#[derive]` and `#[derive]` expansion applied to the current crate.
expansion applied to the current crate.
```console
$ cargo expand
```
This is a wrapper around the more verbose compiler command:
```console
$ cargo rustc --profile=check -- -Zunstable-options --pretty=expanded
```
## Installation ## Installation