RsEPL

RsEPL is a REPL not tied to a compiler version - instead of using the compiler internals to compile and run your code, we just write it to a file and run the compiler on that. This makes it much slower but future-proof.

Prerequisites, installation and usage

RsEPL requires:

• cargo to be installed and available in PATH
• user data directory to be writable (AppData\Roaming in Windows, $HOME/.local/share or $XDG_DATA_Home on Linux etc)

Install with cargo:

cargo install rsepl

Run as rspl

Commands

RsEPL has a few commands, all beginning with ::

• :exit - Exits the program. You can also exit with CTRL-D or CTRL-C
• :h or :help - List commands
• :buffer - Print all code you've entered so far (which will all be compiled)
• :clear - Clear the buffer
• :pop - Remove the last successful line from the buffer (lines that error are not added anyway)

Caveats

This runs quite slowly. Everything you write is appended to a list, which is all written to a rust source file, which is then compiled and run with cargo. This means that every time you run a line all previous lines are also recompiled. Currently there's also no removal of no longer useful lines (one-offs like 2+2 etc).

Future

Features I wish to add:

• remove no longer useful lines
• add handling of multiline code - blocks etc
• extern crates - pull from crates.io and use in REPL

Name

Can be interpreted as anything from: Read - (slowly) Evaluate - Print - Loop to Rust, Evaluate, Print, Loop

License

Licensed under either of

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

at your option.

Contribution

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