previous_object

C实现的MUD,对大家基本入门网络游戏很有帮助!

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     NNNNAAAAMMMMEEEE
          previous_object() - returns the object(s) that called the
          current function

     SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
          mixed previous_object( int | void );

     DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
          Returns an object pointer to the object, if any, that called
          current function.  Note that local function calls do not set
          previous_object() to the current object, but leave it
          unchanged.  If passed a positive integer, it goes back the
          given number of previous objects in the calling chain.
          previous_object(0) is the same as previous_object(),
          previous_object(1) is the previous object's
          previous_object(), etc.  previous_object(-1) returns an
          array containing all of the previous objects.

     SSSSEEEEEEEE AAAALLLLSSSSOOOO
          call_other(3), call_out(3), origin(3)

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