This is a fully embeddable javascript interpreter written in c++. It is not ECMAScript compliant, is not efficient, probably shouldn't be used in a real situation. The benefit, however, is that this project has absolutely no dependencies. You do not even have to include stdio.h! The only requirement is that you implement malloc and support of the new / free keywords.
I want to utilize javascript in a baremetal project of mine. As such, I don't have access to any of the standard libraries which is an odd restriction. I couldn't find any project that was completely standalone, so I decided to try my hand at rolling my own. The scope of fuzzyjs is not overly ambitious and I do not expect to ever support full ECMAScript compliance. But who knows?
Look at fjs.cpp for a small demonstration, but essentially just include "fjs.h" and then you have access to the JSParser object. Instantiate it and call the parse method which takes a char* of code and away you go! There are also methods to register c++ functions for use in javascript (per the demo).
I use the cxxTest Unit Testing framework. Since I'm developing on linux, this was my choice as it's pretty easy to get setup. I highly recommend it. Also, I modified my makefile to have an option that automatically runs the test suite (provided it's installed) which is pretty awesome! More info here: http://cxxtest.com/
The following language features are currently supported (this list will be updated as I add more stuff).
- variable assignment
- function declaration
- c++ interop "delegates"
- delegate invocation
- evaluate simple expressions
- string concatenation
- javascript functions
- the return keyword!
- object creation via: prototypes
- object instantiation
- anonymous functions as parameters
- basic math: plus, minus, multiply (division is a different beast that I will implement later)
- boolean logic operators
- (System Command) parseInt
- increment operators
- for loops
- while loops
- universal "object" prototype
More to come!