Blah

Blah is a toy programming language.

It is written from scratch completely by hand, without using any generated code.

Samples

Here is a sample of Blah code implementing FizzBuzz:

# the mod operator does not exist in this language
to check_a_divides_b with a, b do
    return a = 0 or (b / a) * a = b
done

num: 1
while num < 100 then
    if check_a_divides_b(15, num) then
        writeLine('FizzBuzz')

    else if check_a_divides_b(3, num) then
        writeLine('Fizz')

    else if check_a_divides_b(5, num) then
        writeLine('Buzz')

    otherwise
        writeLine(num)
    fi

    num: num + 1
repeat

And here is a sample of recursion:

to calcFactorial with n do
    if n = 0 then
        return 1
    otherwise
        return n * calcFactorial(n - 1)
    fi
done

writeLine(calcFactorial(10))

You check out more examples in the tests directory.

Compile and Use

To compile Blah, run ghc --make main.hs -o blah in the root directory of the project.

To run Blah in script mode, run ./blah your_blah_file.hs.

To run Blah in REPL mode, run ./blah.

Blah is very slow and there are probably many bugs, so feel free to improve on it or just tell me how to improve it.