GetOrSet doesn't return cache miss message

[yintamaa]

i wanna using GetOrSet to set a empty []byte("") for protoMessage when cache miss
but i have no idea how to determine cache miss, []byte("") will also make [value == nil] true

[coocood]

You can set a single byte value like []byte{0} instead of empty []byte{}.

[yintamaa]

You can set a single byte value like []byte{0} instead of empty []byte{}.

i haved also think about it，but proto.Unmarshal([]byte{0}) will get some error：invalid field number

[coocood]

You can set a single byte value like []byte{0} instead of empty []byte{}.

i haved also think about it，but proto.Unmarshal([]byte{0}) will get some error：invalid field number

Then check the length before calling Unmarshal.