implement a proper REPL

<a href="https://github.com/thestinger"><img src="https://avatars.githubusercontent.com/u/1505226?v=3" align="left" width="96" height="96" hspace="10"></img></a> **Issue by [thestinger](https://github.com/thestinger)** _Thursday Oct 17, 2013 at 02:38 GMT_ _For earlier discussion, see https://github.com/rust-lang/rust/issues/9898_ _This issue was labelled with: A-an-interesting-project, E-hard in the Rust repository_ --- It shouldn't re-compile and re-run the entire input so far with each new addition, and should be able to recover from a compilation error or failure. This should likely be implemented in a separate repository until it's solid and has a working test suite. A good basis for the design would be the [cling](http://root.cern.ch/drupal/content/cling) REPL for C++ built on top of libclang using LLVM's JIT compiler.

Posted by steveklabnik on Jan 21, 2015, 7:29 PM

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