qua

This is my little toy programming language. It's impure and fully immutable, so ends up looking decently functional. It can be interperted as well as compiled to wasm. It is also very much a work in progress!

It looks a little like this:

let letter_grade(percent) = {
  if      percent >= 97 { "A+" }
  else if percent >= 93 { "A" }
  else if percent >= 90 { "A- " }
  else                  { "some other grade" }
};
let percent(points, total) = points / total * 100;

let grade = percent(42 * 0.97, 42); // 97%
let grade = letter_grade(grade);
print(grade); // A+

For more examples, check out the ./turnt/ directory.

Building

Install the latest version of rust, and run cargo build.

Running

To run a qua file, pass it as an argument. cargo run -- /path/to/file.qua.

To generate a wasm file, run cargo run -- --wasm /path/to/file.qua. The file will be written to ../wasm-runner/file.qua.wasm. (so make sure the directory exists. It also expects some stdlib functions to be available. I'll publish the code I use for this soon.)

Tests

The (integration) tests are very very simple, just qua files along with an associated .out file with the expected stdout output.

The most convenient way to run them is with Turnt: turnt ./turnt/* --parallel.