c - Different typedef for same information -


i working on piece of code , encountered :

typedef jobject jthread; typedef jobject jthreadgroup;

what significance of different typedef similar entry ?

it allows have 2 different names same type. there (at least) 2 different reasons you'd want this:

  1. in code, want reader see type of data we're dealing with. after all, "thread" diffferent "group of threads", if underlying type representing them different.
  2. ability change type 1 of types without affecting other. if @ later stage, decide "jthreadgroup" better new type, can change without affecting "jthread".

imagine have small game, count score in integer type. have count of players:

typedef int scorecount; typedef int playercount;

later on, decide need small number, short count players:

typedef short playercount;

same idea using "jobject", different base-type, possibly make easy understand.


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