Integrate Beman.Optional26 into Compiler Explorer

[neatudarius]

Integrate Beman.Optional26 into Compiler Explorer

• [x] Initial integration with Compiler Explorer (trunk version, automated nigthly clone)
• [ ] Decide how versioning and releases for Beman.Optional26 (#28)
• [ ] Release first version
• [ ] Create Compiler Explorer integration docs

[neatudarius]

Updates:

• I've reached @mattgodbolt to get help to make the integration.
• I was able to test with a local deployment of godbolt and with my Beman.Optional fork (full implementation for P3168 still in review). Checked attached demo:

https://github.com/beman-project/Optional26/assets/8947836/63598934-2ef9-4aee-80b3-78dc6e2003df

[neatudarius]

Open issues into Compiler Explorer project:

• https://github.com/compiler-explorer/compiler-explorer/issues/6651
• https://github.com/compiler-explorer/infra/issues/1348

[neatudarius]

Issues from the compiler-explorer project were closed. Now we have Beman.Optional26 trunk (mirror of latest main) deployed every night around 3AM UTC!!!

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In https://godbolt.org/z/7e8r65WvE I was able to successfully build and run all 5 examples from repo (a.k.a. examples/*.cpp) with -std=C++23 and GCC/Clang trunk:

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Compiler Explorer integration flow for Beman.Optional26:

0. Initial integration - done

1. Specific versions / releases can be added afterwards. Need to always make 2 PRs :

   • infra PR (install a specific version of Beman.Optional26 into the godbolt backend): example in https://github.com/compiler-explorer/infra/pull/1347
   • compiler-explorer (deploy UI integration with the new library version): example in https://github.com/compiler-explorer/compiler-explorer/pull/6652

2. Changes can be tested on local setup: https://github.com/compiler-explorer/compiler-explorer/blob/main/docs/AddingALibrary.md

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