Add doc page for capture checking. #14438
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Add doc page that explains what capture checking is, emphasizing that it is still a research project in a separate branch.
smarter
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Feb 8, 2022
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| val x: A = this | ||
| def f = println(c) // error |
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I'm not completely clear on this example, if f was defined before x, would that change the inferred type for this and lead to an error when typing x?
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Yes. You get:
16 | val x: A = this
| ^^^^
| Found: (A.this : {c} A)
| Required: A
smarter
reviewed
Feb 8, 2022
| private var forced = false | ||
| private var cache: {this} LzyList[A] = uninitialized | ||
| private def force = | ||
| if !forced then { cache = tl(); forced = true } |
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Does this mean that {*} LzyList[A] <: {this} LzyList[A] ? How does this follow exactly?
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No, it's more subtle. See #14387
I still need to work that in the discussion here somehow.
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Add doc page that explains what capture checking is, emphasizing that
it is still a research project in a separate branch.