Neptune Lang

Neptune is a dynamically typed scripting language

Documentation crates.io Book

Goals

1. Embeddability: It can be embedded in any rust application. Synchronous or asynchronous rust functions can be used by a neptune script.
2. Performance: It performs better than most interpreted(JITless) scripting languages. See Benchmarks for a comparison with lua, luajit, nodejs and ruby.
3. Security: It is impossible to do any kind of undefined behaviour(including integer overflow)
4. Concurrency
   • It is trivial to write asynchronous code
   • An error in a task does not always terminate the whole application and can be handled gracefully.
   • There are no function colors.
5. Small implementation

Features

• Iterators
• String Interpolation
• Modules
• Optional semicolons
• UTF-8 strings
• and much more...

Getting Started

The CLI be installed by the command given below. You must have the rust compiler and a C++ compiler. The C++ compiler can be set using the CXX environment variable. Clang is recommended for best performance.

cargo install neptune-cli

At the moment the CLI has a few basic functions and a REPL. The REPL supports multiline entries and the following shortcuts. | Command | Description | | ----------- | -----------------| | Ctrl-L | Clear the screen | | Ctrl-C | Interrupt/Cancel editing | | Ctrl-D | Quit REPL | | Up arrow | Previous history entry | | Down arrow | Next history entry |

To embed it in rust you can use the library from crates.io.

Todo

• CLI - Standard library, external modules
• Preemptiveness?
• Buffer type