MoonScript v0.2.2

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Today marksMoonScript version 0.2.2, the CoffeeScript inspiredlanguage that compiles to Lua. It’s been approximately 11 months since the lastrelease, and I'd like to apologize for the long gap. Hopefully we'll see morefrequent updates in the future.

We've got a handful of new features and fixes:

You canfollow me on twitter for updates or complaints. Also if you'reusing MoonScript I'd love to hear about it:leafot@gmail.com.

Changes

• Compiledfiles will now implicitlyreturn theirlast statement. Be careful, this might change whatrequire returns.

New Things

The Language

• Addedcontinue keyword forskipping the current iteration in a loop.
• Addedstring interpolation.
• Addeddo expression and block.
• Addedunless as a block and line decorator. Is the inverse ofif.
• Assignment can be used in anif statement’sexpression.
• Addedor= andand= operators.
• @@ can be prefixed in front of a name to access that name withinself.__class
• @ and@@ can beused asvalues to referenceselfandself.__class.
• In class declarations it’s possible toassign to the classobject instead of theinstance metatable by prefixing the key with@.
• Class methods can accesslocals defined within thebody of theclass declaration.
• Super classes arenotified when they areextended from with an__inherited callback.
• Classes can nowimplicitly return and beexpressions.
• local keyword returns, can be used for forward declaration or shadowing avariable.
• String literals can be used as keys intableliterals.
• Call methods on string literals without wrapping in parentheses:"hello"\upper!
• Table comprehensions can return a single value that is unpacked into the keyand value.
• The expression in awith statement can now be anassignment, to give a nameto the expression that is being operated on.

The API

• Theload functions can take anoptional last argument of options.

The Tools

• Theonline compiler now runs through a webservice instead of emscripten, should work reliably on any computer now.
• Windows binaries have been updated.

Bug Fixes

• Significantly improved theline numberrewriter. It should nowaccurately report all line numbers.
• Genericfor loops correctly parse for multiple values as defined in Lua.
• Update expressions don’t fail with certain combinations of precedence.
• All statements/expressions are allowed in a class body, not just some.
• x = "hello" if something will extract the declaration ofx if it’s not inscope yet. Preventing an impossible to access variable from being created.
• varargs,..., correctly bubble up through automatically generated anonymousfunctions.
• Compiler doesn’t crash if you try to assign something that isn’t assignable.
• Numerous other small fixes. Seecommit log.

Other Stuff

Since the past release I've written quite a bit of MoonScript. I wrote fourgames, feel free to check out the source code:

• ExoSlime
• Wulcan
• Volcanox
• Tetris

I've written atutorial for installingMoonScript on thethree main platforms, Windows, OSX, and Linux.

I've written a script and guide forrunning Lua onHeroku. Which lets us also runMoonScript. This opens up quite a few opportunities, more on that later.

Bitbucket nowhighlights MoonScriptfiles.If you'd like to see MoonScript on GitHub say something here:https://github.com/github/linguist/pull/246.

Thanks

That’s all for this release. Thanks to everyone who submitted bugs and patchesand provided feedback on GitHub. See you next release.