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PadraigK/generics.swift

Created May 12, 2022 00:21
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Function signatures with generics
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generics.swift
func makeOrReuse<T : IdentifierCellView>(_ cellType: T.Type, tableView: NSTableView) -> T
func makeOrReuse<T : IdentifierCellView>(tableView: NSTableView) -> T
// IMHO: The first signature is vastly superior even though the first argument is unncessary.
// Think about the call sites
let cell = makeOrReuse(ImageExportOptionCells.Toggle.self, tableView: tableView)
// vs
let cell : ImageExportOptionCells.Toggle = makeOrReuse(tableView: tableView)
// With the second option, the type definition of the receiving variable is effectively an additional argument to the
// method, but it doesn't _read_ like that at all.
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