![Jasper Programming Language logo](img/JasperLogo.png)
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:
- Sum types
- Record types
- Type deduction
- First class functions with closure
- Consistent and context-free syntax
- Syntactic sugar
- Many others
Here is an example piece of "functional-style" code:
fn greeting(name) =>
"Hello, "
+ (if (name == "")
then "friend"
else name)
+ "!";
It can also be written like this, in a more imperative style, and using some intermediate variables:
fn greeting(name) {
if (name == "")
name = "friend";
prefix := "Hello, ";
suffix := "!";
return prefix + name + suffix;
};
or like this, mixing functional, and imperative style:
fn greeting(name) =>
seq {
if (name == "")
return "friend";
return name;
}
|> (fn(name) => "Hello, " + name + "!")();
you can find more examples in the tests
directory.
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
We also have small test suite, which can be compiled with
make tests
and then run with
./bin/run_tests