Mech is for building data-driven, reactive systems like robots, games, embedded devices and more.

It simplifies data distribution, transformation, and analysis so you can focus on your project.

• Try Mech online in your browser.
• Read the docs to learn the language.
• Follow our blog to stay updated on new developments.

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The following code implements FizzBuzz in Mech:

See the docs for an extended version that runs live in your browser.

Some notable features of Mech are demonstrated in this short program:

• Concise Syntax: Expressive and flexible, with no need for keywords or semicolons; Mech programs are generally shorter than in other languages.
• Broadcast Operations: Vector operations apply elementwise automatically, removing explicit loops and enabling efficient vectorization.
• Logical Indexing: Vector elements are conditionally selected using broadcast logic operations, enabling declarative iteration and parallel execution.
• Type Inference: Variable and expression types are inferred, so explicit type declarations are often unnecessary.
• Immutable: Variables are immutable unless specified, promoting safer code and easier reasoning.
• Rich Text: Mech programs support rich formatting and literate programming through Mechdown, a Markdown dialect.

Mech also supports a number of other features, such as pattern matching,state machines, comprehensions, and relational joins.

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Here are a few more examples of Mech code to give you a sense of the language. First, the classic factorial program expressed in Mech:

Live Example

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Pattern matching is a prominent feature throughout Mech. Here is an example of pattern matching on arrays:

Live Example

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State machines are Mech's way of expressing protocols, processes, and asynchronous computations. Here is an example of a simple state machine that counts down from a given number:

Live Example

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Mech also supports comprehensions and relational joins. Here is an example of a comprehension that finds the friends of friends in a social graph by joining two generators over a common variable:

Live Example

Run Mech

There are several ways to get Mech running on your machine, which you can find in the documentation. But the easiest way to get started is to use the online REPL at try.mech-lang.org.

Documentation

New to Mech? Start with Learn Mech in Fifteen Minutes.

Comprehensive documentation is available at docs.mech-lang.org and open-sourced on GitHub.

Community

The Mech community gathers at a few places around the Internet:

• Discord - for live chat
• GitHub - for code and issues
• YouTube - for video tutorials
• Reddit - for help and general discussion
• Mailing List - for dev discussion

Feel free to stop by and introduce yourself -- we're happy to meet new users and answer questions!

Project Roadmap

Mech v0.3 is currently beta status, meaning while many intended features are implemented and working well, other features are incomplete, not tested, or undocumented.

A Brief Roadmap:

• ☑️ v0.1 - proof of concept system - minimum viable language implementation
• ☑️ v0.2 - data specification - formulas, defining and manipulating data
• 📍 v0.3 - program specification - functions, modules, state machines, Mika
• ☐ v0.4 - system specification - tools, distributed programs, capabilities

For more details, read the ROADMAP.

Notice

Mech should be considered unstable and therefore unfit for use in critical systems until v1.0 is released.

License

Licensed under Apache 2.0.