-- -- Copyright (C) 1996 Ada Resource Association (ARA), Columbus, Ohio. -- Author: David A. Wheeler -- with Text_IO, Ada.Strings.Unbounded, Ustrings, Rooms; use Text_IO, Ada.Strings.Unbounded, Ustrings, Rooms; package body Occupants is procedure Put_View(T : access Occupant; Agent : access Thing'Class) is begin Put("You are inside "); Put_Line(Short_Description(T)); Put_Line("."); Put_Contents(T, Agent, "You see:"); end Put_View; procedure Look(T : access Occupant) is -- T is running a "look" command; tell T what he views. begin if Container(T) = null then Put("You are inside nothing at all."); else Put_View(Container(T), T); end if; end Look; procedure Get(Agent : access Occupant; Direct_Object : access Occupant'Class) is begin if May_I_Get(Direct_Object, Agent) then Place(T => Direct_Object, Into => Thing_Access(Agent)); end if; end Get; function May_I_Get(Direct_Object : access Occupant; Agent : access Occupant'Class) return Boolean is begin Sorry("get", Name(Direct_Object)); -- Tell the getter sorry, can't get it return False; end May_I_Get; procedure Drop(Agent : access Occupant; Direct_Object : access Occupant'Class) is begin if May_I_Drop(Direct_Object, Agent) then Place(T => Direct_Object, Into => Container(Agent)); end if; end Drop; function May_I_Drop(Direct_Object : access Occupant; Agent : access Occupant'Class) return Boolean is begin return True; end May_I_Drop; procedure Inventory(Agent : access Occupant) is begin Put_Contents(Agent, Agent, "You're carrying:", "You aren't carrying anything."); end Inventory; procedure Go(Agent : access Occupant; Dir : in Direction) is begin if Container(Agent) = null then Put_Line("Sorry, you're not in a room!"); else declare Destination : Thing_Access := What_Is(Container(Agent), Dir); begin if Destination = null then Put_Line("Sorry, you can't go that way."); else Place(Agent, Destination); end if; end; end if; end Go; end Occupants; -- -- Permission to use, copy, modify, and distribute this software and its -- documentation for any purpose and without fee is hereby granted, -- provided that the above copyright and authorship notice appear in all -- copies and that both that copyright notice and this permission notice -- appear in supporting documentation. -- -- The ARA makes no representations about the suitability of this software -- for any purpose. It is provided "as is" without express -- or implied warranty. --
You may also see the corresponding specification.
You may also see the list of program units.
The following compilation units are referred to ("with"'ed) by Package body Occupants:
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