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This is an FAQ
“ Ladybird started as a component of the SerenityOS hobby project, which only allows C++. The choice of language was not so much a technical decision, but more one of personal convenience. Andreas was most comfortable with C++ when creating SerenityOS, and now we have almost half a million lines of modern C++ to maintain.
However, now that Ladybird has forked and become its own independent project, all constraints previously imposed by SerenityOS are no longer in effect.
We have evaluated a number of alternatives, and will begin incremental adoption of Swift as a successor language, once Swift version 6 is released.”
https://ladybird.org/#faq
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InfluxDB
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Mostly because the author switched focus to yet another language, and eventually decided to focus on something else instead of programming languages.
https://github.com/sophiajt/june
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This particular memory vulnerability, as I understand it, was a result of a `ReadonlySpan<>` targeting a resizable vector. A simple technique used by the scpptool-enforced safe subset of C++ to address this situation is to temporarily move the contents of the resizable vector into a non-resizable vector [1] and target the span at the non-resizable vector instead.
Upon destruction, the non-resizable vector will automatically return the contents back to the original resizable vector. (It's somewhat analogous to borrowing a slice in Rust.)
While it wouldn't necessarily prevent you from doing the flawed/buggy thing you were trying to do, it would prevent it from resulting in a memory vulnerability.
[1] https://github.com/duneroadrunner/scpptool#xslta_vector-xslt...
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I'm honestly not at all familiar with browsers but I really do wonder if a custom language wouldn't be a reasonable tradeoff. It's not all that insane as that is a path that has been walked before. For instance FoundationDB has their own syntax to manage their actor system which just transpiles to C++: https://github.com/apple/foundationdb/blob/main/flow/README....
V8 also has torque which I think to some degree also fits into that type of mindset.
