Disturbing that it's the 21st century and people are still designing languages without formal models...https://twitter.com/whitequark/status/873338473381601281 …
But a language that lacks a fairly rigorous specification that's at least theoretically formalizable is a huge mess.
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"Design by implementation and worry about a spec later" can work out, eventually, but usually it doesn't...
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...and leads either to dead-end languages that can never have more than one implementation (Perl) or compat hell (JS, oldschool C, ...).
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conversely, what you describe here is just Rust's RFC process, and it's overall not particularly remarkable.
End of conversation
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