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From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: How pass a "null" as a parameter of anonymous access type
References: <3ABA5AC3.4C6C7536@t-online.de>
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Date: Thu, 22 Mar 2001 21:02:12 GMT
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> Both a or b may be a null pointer, but Ada say "null not allowed for
> anonymous access type".
> Any idea what to do ?
  Make them non-anonymous access types.
> I want call a C-binding procedure which is defined as "procedure p (a :
> access X; b : access Y);"
    Instead use
  type a1 is access X;
  type b1 is access Y;
    procedure p(a : a1; b : b1);
A variable of type a1 or b1 can be null.