additional map keys

[Arpit Baldeva]

Hi,

Are there any plans to support

1. Enums as keys in a map

2. Case-insensitive keys in a map 

Thanks

Arpit

[Feng Xiao]

On Mon, Nov 21, 2016 at 9:41 AM, Arpit Baldeva <abal...@gmail.com> wrote:

Hi,

Are there any plans to support

1. Enums as keys in a map

This is disallowed because it doesn't play well with proto3 open enum semantics. For example, in Java, if you have a Map<Enum, Value>, the key can only be one of the defined values. If you happen to receive an enum key value from a remote client/server that's not in the defined value set, it can't be put in the Map<Enum, Value>. This limitation forces us to either drop map entires with unknown enum keys (which is against proto3 open enum semantics), or disallow enum as map keys all together.

 

2. Case-insensitive keys in a map 

This can only happen if the map structure in every protobuf-supported language supports case-insensitive keys. I doubt that's the case though.

 

Thanks

Arpit

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