Two new draft pattern matching JEPs

[Brian Goetz]

Complete agreement.  This amounts to a hidden laziness requirement that, 
while it might be possible to support it for built-in patterns, would 
present hideous translation challenges for nontrivial declared patterns.

On 3/5/2021 5:41 PM, Guy Steele wrote:
> A compiler would likely optimize common special cases to effectively implement all-at-once population of bindings when it would be impossible to detect any difference in behavior.  But I don’t think all-at-once population is the right theoretical model.

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