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by jackcviers3
1037 days ago
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In the lexical closure doc example, why choose to show variable name shadowing? What is the purpose of `let x = 3` in the below? let x = 3
func foo(x: Int) {
fn inc() { x + 1 } // OK, will return x + 1
fn fail() { y + 1 } // fail: The value identifier y is unbound.
} `foo` also captures the global `x`, but shadows it with the parameter `x`. Can `Generics` be generic - are there higher kinds? Are they all invariant, or do they have variance and if so what is the notation? Maybe I missed it - can methods be destructured from structs? Can enums have methods? Is there partial application for methods and functions? |
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