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

Todo

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

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A fast, concurrent and embeddable scripting language

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