Jasper

Jasper is a scripting language inspired by Haskell, Javascript, and modern C++. Jasper can be embedded in C++ applications.

The aim of Jasper is to be:

• Nice to use
• Easy to refactor
• Consistent

For this purpose, Jasper has:

• Type deduction
• First class functions
• Consistent and context-free syntax
• Syntactic sugar
• Many others

Here is an example piece of code:

or_default := fn(str, default) =>
	(if str == ""
		then default
		else str);

make_greeting := fn(prefix, suffix) =>
	fn(name) =>
		prefix + name + suffix;

say_hello := fn(name) {
	greeting := make_greeting("Hello, ", "!");
	return name
		|> or_default("Friend")
		|> greeting();
};

__invoke := fn() {
	return say_hello("World");
};

Using the interpreter

First, you have to compile it using the following command:

make interpreter

Once it is compiled, you can find the executable under bin/jasperi, and execute it following the user guide, which can be found in multiple languages in the docs directory.

NOTES: Our Makefile uses non-standard features of gnu make

Jasper is written in C++14, so you will need a C++14 compatible compiler, such as GCC 6.1 or later

Running the tests

We also have small test suite, which can be compiled with

make tests

and then run with

./bin/run_tests