swiftlang/swift
Ver no GitHub[SR-3550] Compound name syntax for functions with no params
Open
#46.138 aberto em 5 de jan. de 2017
compilerdeclaration namesgood first issueswift evolution proposal needed
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Description
| Previous ID | SR-3550 |
| Radar | None |
| Original Reporter | @jtbandes |
| Type | Improvement |
| Votes | 0 |
| Component/s | Compiler |
| Labels | Improvement, StarterProposal |
| Assignee | None |
| Priority | Medium |
md5: 9e54c0bcc3910a9a4c3dc549a118933b
relates to:
- SR-1408 NSArray indexesOfObjectsPassingTest cannot be called in Swift 3
Issue Description:
The "compound name" of a function can be used to resolve ambiguities with argument labels, e.g. foo(x:) or foo(_:). However, there's no such shortcut to specify an overload that has no arguments. A workaround is to use its type with as:
import Foundation
class C: NSObject {
func foo() {}
func foo(x: Int) {}
}
#selector(C.foo) // error: ambiguous use of 'foo'
#selector(C.foo(x:)) // resolve ambiguity with compound name
#selector(C.foo as (C) -> () -> ()) // resolve ambiguity by specifying type
But it'd be nice to have some way of doing this without specifying the type. Perhaps foo(_) (for symmetry with foo(_:))?