mys 0.153.0

The Mys (/maɪs/) programming language.

WARNING

Mys is still in the very early stages of development. API:s will change, so now is the time to make suggestions! Join the Mys Discord server to get in touch with the developers!

🐁 Mys

The Mys (/maɪs/) programming language - an attempt to create a statically typed Python-like language that produces fast binaries.

Mys is heavily inspired by Python’s syntax and Rust’s packaging.

Source code:

from random.pseudo import random

def main():
    print(random())

Package configuration:

[package]
name = "robot"
version = "0.1.0"
authors = ["Mys Lang <[e-mail]>"]

[dependencies]
random = "*"

Mys is mainly targeting resource constrained single and multi core embedded systems, but is just as useful in desktop environments.

Notable differences to Python:

• Traits instead of classic inheritence.

• Statically typed.

• Bytes and strings are mutable.

• Integers are bound (i32, u32, i64, …).

• Iterators/generators do not (yet?) exist.

• Rust-like generic functions and classes.

• Only packages. No stand alone modules.

• Compiled to machine code. No interpreter.

• Data races and memory corruption possible, but unlikely.

• No async.

• Only from ... import ... is allowed. import ... is not.

• Only functions, enums, traits, classes and variables can be imported, not modules.

Build process

mys build, mys run and mys test does the following:

1. Use Python’s parser to transform the source code to an Abstract Syntax Tree (AST).

2. Generate C++ code from the AST.

3. Compile the C++ code with g++.

4. Link the application with g++.

Calling mys from GNU Make recipe

mys uses make internally. Always prepend the command with + to share jobserver.

Mocking

from random.pseudo import random

def add(value: f64) -> f64:
    return value + random()

def test_add():
    random_mock_once(5.3)
    assert add(1.0) == 6.3