[swift-evolution] [Proposal draft] Use obtain let instead if let construction

[Carlos García]

Hi all,

Here’s a draft proposal to change if let construction for obtain let. Proposal is at:
https://github.com/carlosypunto/swift-evolution/blob/obtain-let-instead-if-let/proposals/XXXX-Use-obtain-let-instead-if-let-constructions.md <https://github.com/carlosypunto/swift-evolution/blob/obtain-let-instead-if-let/proposals/XXXX-Use-obtain-let-instead-if-let-constructions.md>

I would like to see what you think and get help with "Effect on ABI stability" and "Effect on API resilience" points

Carlos

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