FB12863947

enumerateattributes.swift

// Documentation says:
//
// > Executes the specified block for each range of a particular attribute in the attributed string.
// 
// documentation is not correct (or implementation, hard to tell). The block is executed at least once, not matter if particular attribute is or is not present in the attributed string.

import Foundation
import AppKit

/// Attributed string without any attribute, in particular no font attribute set
let attr = NSAttributedString(string: "foo")

/// Executes the specified closure for each range of a particular attribute in the attributed string.
attr.enumerateAttribute(.font, in: NSRange(location: 0, length: attr.length)) { value, range, stop in
	// how many times executed?
	print(range)
}