It's 2025, can we have a “lazy let”?

[Karl]

@ksluder

Either way, it was originally not permissible to call a mutating method via non-exclusive access. (Methods on classes are never mutating.) That changed with the introduction of atomics.

Atomic operations are not formally mutating, either. They behave like methods on classes.

add(_:ordering:) | Apple Developer Documentation

Or do you mean something else?