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The Hashable now want to use protocol instead of hashValue but I can't figure it out

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2

1

I use to have the following code that worked in Swift 4.2 but is now deprecated in Swift 5:

struct xxx: Hashable {
 var hashValue: Int return uniqueIdentifier

When I try to use the new hash(into hasher: inout Hasher) I'm not sure what to do. My uniqueIdentifier starts at 0 and keeps incrementing so it's always unique, no need for anything fancy. But it seams to me that I'm now required to have the following code:

func hash(into hasher: inout Hasher) 
 hasher.combine(uniqueIdentifier)
 

Is this true? I don't see why I need to combined my uniqueIdentifier with some seed. Is there a way I can overcome this or I'm I stuck using hasher.combine(uniqueIdentifier)?

swift4.2 hashable swift5

share|improve this question

asked Mar 28 at 2:16

mretondomretondo

10877 bronze badges

add a comment | 

2

1

I use to have the following code that worked in Swift 4.2 but is now deprecated in Swift 5:

struct xxx: Hashable {
 var hashValue: Int return uniqueIdentifier

When I try to use the new hash(into hasher: inout Hasher) I'm not sure what to do. My uniqueIdentifier starts at 0 and keeps incrementing so it's always unique, no need for anything fancy. But it seams to me that I'm now required to have the following code:

func hash(into hasher: inout Hasher) 
 hasher.combine(uniqueIdentifier)
 

Is this true? I don't see why I need to combined my uniqueIdentifier with some seed. Is there a way I can overcome this or I'm I stuck using hasher.combine(uniqueIdentifier)?

swift4.2 hashable swift5

share|improve this question

asked Mar 28 at 2:16

mretondomretondo

10877 bronze badges

add a comment | 

I use to have the following code that worked in Swift 4.2 but is now deprecated in Swift 5:

struct xxx: Hashable {
 var hashValue: Int return uniqueIdentifier

When I try to use the new hash(into hasher: inout Hasher) I'm not sure what to do. My uniqueIdentifier starts at 0 and keeps incrementing so it's always unique, no need for anything fancy. But it seams to me that I'm now required to have the following code:

func hash(into hasher: inout Hasher) 
 hasher.combine(uniqueIdentifier)
 

Is this true? I don't see why I need to combined my uniqueIdentifier with some seed. Is there a way I can overcome this or I'm I stuck using hasher.combine(uniqueIdentifier)?

swift4.2 hashable swift5

share|improve this question

asked Mar 28 at 2:16

mretondomretondo

10877 bronze badges

struct xxx: Hashable {
 var hashValue: Int return uniqueIdentifier

func hash(into hasher: inout Hasher) 
 hasher.combine(uniqueIdentifier)
 

share|improve this question

asked Mar 28 at 2:16

mretondomretondo

10877 bronze badges

share|improve this question

asked Mar 28 at 2:16

mretondomretondo

10877 bronze badges

asked Mar 28 at 2:16

mretondomretondo

10877 bronze badges

asked Mar 28 at 2:16

mretondomretondo

10877 bronze badges