c++ - Enums, overlapping values, C# -

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apologies in advance i'm sure must have asked before can't find it.

just had surprise, colleague , both added same value in enum, , compiled, e.g.

  enum myenum   {     mine = 1,     = 1   }

looks c/c++ supports (?). reason behaviour, cases it's useful? saw 1 case difference human languages (one = 1, eins = 1, etc) i'm not convinced

thanks

let's take simple example 

enum privilegelevel {     none,     reporter,     reviewer,     admin,     defaultfornewuser = none,     defaultforprojectowner = reviewer, };

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