84 lines
4.8 KiB
Ada
84 lines
4.8 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- I M P U N I T --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2000-2020, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package contains data and functions used to determine if a given unit
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-- is an internal unit intended only for use by the implementation and which
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-- should not be directly WITH'ed by user code. It also checks for Ada 2005
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-- units that should only be WITH'ed in Ada 2005 mode, and Ada 2012 units
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-- that should only be WITH'ed in Ada 2012 mode.
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with Types; use Types;
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package Impunit is
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type Kind_Of_Unit is
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(Implementation_Unit,
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-- Unit from predefined library intended to be used only by the compiler
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-- generated code, or from the implementation of the run time. Use of
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-- such a unit generates a warning unless the client is compiled with
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-- the -gnatg switch. If we are being super strict, this should be an
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-- error for the case of Ada units, but that seems over strenuous.
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Not_Predefined_Unit,
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-- This is not a predefined unit, so no checks are needed
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Ada_95_Unit,
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Ada_2005_Unit,
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Ada_2012_Unit,
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Ada_202X_Unit);
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-- This unit is defined in the Ada RM of the given year. This is used to
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-- give a warning when withing a unit from a wrong mode (e.g. withing an
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-- Ada_2012_Unit when compiling with -gnat95). Note that in Ada 83 mode,
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-- no child units are allowed, so you can't even name such a unit.
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function Get_Kind_Of_Unit (U : Unit_Number_Type) return Kind_Of_Unit;
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-- Given the unit number of a unit, this function determines the type
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-- of the unit, as defined above. If the result is Implementation_Unit,
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-- then the name of a possible alternative equivalent unit is placed in
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-- Error_Msg_String/Slen on return. If there is no alternative name, or if
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-- the result is not Implementation_Unit, then Error_Msg_Slen is zero on
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-- return, indicating that no alternative name was found.
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function Get_Kind_Of_File (File : String) return Kind_Of_Unit;
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-- Same as Get_Kind_Of_Unit, for a given filename
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function Is_Known_Unit (Nam : Node_Id) return Boolean;
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-- Nam is the possible name of a child unit, represented as a selected
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-- component node. This function determines whether the name matches one of
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-- the known library units, and if so, returns True. If the name does not
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-- match any known library unit, False is returned.
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function Not_Impl_Defined_Unit (U : Unit_Number_Type) return Boolean;
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-- This function returns True if U represents a unit that is permitted by
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-- the restriction No_Implementation_Units (i.e. a unit in the Ada, System,
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-- and Interfaces hierarchies that is defined in the RM, or a user defined
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-- unit. It returns False if U represents a unit that is not permitted by
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-- this restriction, which includes units in these three hierarchies that
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-- are GNAT implementation defined. It also returns False for any units in
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-- the GNAT hierarchy, which is not strictly conforming, but so obviously
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-- useful that it is a reasonable deviation from the standard.
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end Impunit;
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