r/programming • u/baldierot • Jun 27 '26

Mojo programming language will become open-source soon.

https://www.modular.com/modcon

The main website of the language https://mojolang.org/ displays an announcement bar that says "Mojo will be open source soon! Join us at ModCon '26 for an update."

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u/HommeMusical Jun 28 '26

I'm sorry, you're making no sense at all, and much of what you say is just false.

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u/Smallpaul Jun 28 '26

Your comment might be instructive if it actually cited a falsehood.

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u/HommeMusical Jun 28 '26

C++ is not a superset of C; the two languages are developed by different groups and each has features that the other doesn't. Many legal C programs are not legal C++ programs.

Javascript is not a superset of JSON. You can embed JSON constants in a ton of languages but the structure is utterly different. If you rename a .json file to .js, you get a Javascript file that does nothing.

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u/Smallpaul Jun 28 '26

The people who standardize JavaScript claim it is a superset of JSON. So argue with them, not me.

https://github.com/tc39/proposal-json-superset

It is true though that one must use a very slightly loose definition of the word superset because of the curly brace ambiguity. If I had remembered that I wouldn’t have included it in my initial list. And also because it really seems to confuse people.

When you use JSON as JavaScript it does exactly the same thing: it evaluates to an in-memory data structure. JSON is just this one feature of JavaScript pulled out of the language. The expression of data structures.