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From: "David C. Hoos, Sr" <david.c.hoos.sr@ada95.com>
Subject: Re: access_to_constant as subprogram paramater
Date: 1998/09/19
Message-ID: <xm4csCA59GA.143@samson.airnet.net>#1/1
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References: <6u0pmf$rvk$1@nnrp1.dejanews.com>
Newsgroups: comp.lang.ada
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Date: 1998-09-19T00:00:00+00:00
List-Id: <comp.lang.ada>


nelson@blaze-net.com wrote in message <6u0pmf$rvk$1@nnrp1.dejanews.com>...

<snip>
Here's the way to do what you want:

procedure Access_Parameter is

   Pathname : aliased constant String := "/a/b/c.adb";
   -- Declared as constant in order to produce compilation error

   type Constant_String_Access_Type is access constant String;

   procedure Parse (Input : Constant_String_Access_Type) is
      --
      -- Would like to declare this:
      -- procedure Parse (Input : access constant String) is
      -- as Parse never modifies the input string
      --
   begin
      null; -- Parse a pathname string into components
   end Parse;

begin
   Parse (Pathname'Access);
end Access_Parameter;

David C. Hoos, Sr.