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-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- I M P U N I T --
-- --
-- S p e c --
-- --
-- Copyright (C) 2000-2011, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This package contains data and functions used to determine if a given unit
-- is an internal unit intended only for use by the implementation and which
-- should not be directly WITH'ed by user code. It also checks for Ada 2005
-- units that should only be WITH'ed in Ada 2005 mode, and Ada 2012 units
-- that should only be WITH'ed in Ada 2012 mode.
with Types; use Types;
package Impunit is
type Kind_Of_Unit is
(Implementation_Unit,
-- Unit from predefined library intended to be used only by the compiler
-- generated code, or from the implementation of the run time. Use of
-- such a unit generates a warning unless the client is compiled with
-- the -gnatg switch. If we are being super strict, this should be an
-- error for the case of Ada units, but that seems over strenuous.
Not_Predefined_Unit,
-- This is not a predefined unit, so no checks are needed
Ada_95_Unit,
-- This unit is defined in the Ada 95 RM, and can be freely with'ed in
-- both Ada 95 mode and Ada 05 mode. Note that in Ada 83 mode, no child
-- units are allowed, so you can't even name such a unit.
Ada_2005_Unit,
-- This unit is defined in the Ada 2005 RM. Withing this unit from an
-- Ada 95 mode program will generate a warning (again, strictly speaking
-- this should be an error, but that seems over-strenuous).
Ada_2012_Unit);
-- This unit is defined in the Ada 2012 RM. Withing this unit from an
-- Ada 95 or 2005 mode program will generate a warning (again, strictly
-- speaking this should be an error, but that seems over-strenuous).
function Get_Kind_Of_Unit (U : Unit_Number_Type) return Kind_Of_Unit;
-- Given the unit number of a unit, this function determines the type
-- of the unit, as defined above. If the result is Implementation_Unit,
-- then the name of a possible atlernative equivalent unit is placed in
-- Error_Msg_String/Slen on return. If there is no alternative name, or if
-- the result is not Implementation_Unit, then Error_Msg_Slen is zero on
-- return, indicating that no alternative name was found.
function Is_Known_Unit (Nam : Node_Id) return Boolean;
-- Nam is the possible name of a child unit, represented as a selected
-- component node. This function determines whether the name matches one of
-- the known library units, and if so, returns True. If the name does not
-- match any known library unit, False is returned.
function Not_Impl_Defined_Unit (U : Unit_Number_Type) return Boolean;
-- This function returns True if U represents a unit that is permitted by
-- the restriction No_Implementation_Units (i.e. a unit in the Ada, System,
-- and Interfaces hierarchies that is defined in the RM, or a user defined
-- unit. It returns False if U represents a unit that is not permitted by
-- this restriction, which includes units in these three hierarchies that
-- are GNAT implementation defined. It also returns False for any units in
-- the GNAT hierarchy, which is not strictly conforming, but so obviously
-- useful that it is a reasonable deviation from the standard.
end Impunit;
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