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What do you mean with "is the language open source"? The Ada specification is public [0] but not open source -- but the C and C++ specifications are not open source either, in the normal sense of the term. And like with C and C++, there are both open source and proprietary compilers for Ada, see e.g. [1]

What's mostly not open source (FAFAIK) is SPARK, the formal verification framework for Ada.

[0] https://www.adaic.org/ada-resources/standards/ada22/

[1] https://github.com/ohenley/awesome-ada#compilers





SPARK tools are also open source. The main tool `gnatprove` is based on GCC as well. https://github.com/AdaCore/spark2014

It's not a community project, AFAICT. Few people know how to build it from source.

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That links gives me a 404. Does it require membership of some organization before you're allowed to view it?

edit: did you mean https://github.com/AdaCore/spark2014 ?

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Sorry, yes 2014. Fixed it.

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The C++ (draft) standards are open source:

https://github.com/cplusplus/draft

Last time I looked I could not find an equivalent repository for the C standards.

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There isn't one. They publish completed drafts on the working group website:

https://www.open-std.org/jtc1/sc22/wg14/www/wg14_document_lo...

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.pdf unfortunately. The C++ sources that I linked to are machine readable .tex.

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