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Add nullable spec for nested functions

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Andy Gocke 2020-06-22 15:07:55 -07:00 committed by GitHub
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proposals/csharp-8.0/nullable-reference-types-specification.md
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@ -162,6 +162,13 @@ Type parameters additionally take their constraints into account:
For a type parameter `T`, `T?` is only allowed if `T` is known to be a value type or known to be a reference type.
### Nested functions
Nested functions (lambdas and local functions) are treated like methods, except in regards to their captured variables.
The default state of a captured variable inside a lambda or local function is the intersection of the nullable state
of the variable at all the "uses" of that nested function. A use of a function is either a call to that function, or
where it is converted to a delegate.
### Oblivious vs nonnullable
A `type` is deemed to occur in a given annotation context when the last token of the type is within that context.