Swift: Dictionaries with nested Dictionaries / Arrays should be equatable

Originator:raise.rescue
Number:rdar://18707590 Date Originated:20-Oct-2014 04:18 PM
Status:Duplicate of 17144340 Resolved:
Product: Product Version:
Classification: Reproducible:
 
Summary:
Simple dictionaries can be compared without writing boilerplate-code, which is nice. But as soon as dictionaries have dictionaries / arrays as values, they are no longer comparable, which is bad.

Steps to Reproduce:
This code-snippet outlines the problem:

var r: Bool
var dict = [1 : 2]
// this works, as expected
r = dict == dict

var dictionaryInDictionary = [1 : [2 : 3]]
// this should work, but the compiler says error: '[Int : Dictionary<Int, Int>]' is not convertible to 'MirrorDisposition'
r = dictionaryInDictionary == dictionaryInDictionary

var arrayInDictionary = [1: [2]]
// this should work, but the compiler says error: '[Int : Array<Int>]' is not convertible to 'MirrorDisposition'
r = arrayInDictionary == arrayInDictionary

Comments


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