603 lines
30 KiB
Ada
603 lines
30 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- R E S T R I C T --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1992-2020, 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 deals with the implementation of the Restrictions pragma
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with Aspects; use Aspects;
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with Namet; use Namet;
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with Rident; use Rident;
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with Snames; use Snames;
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with Table;
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with Types; use Types;
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with Uintp; use Uintp;
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package Restrict is
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Restrictions : Restrictions_Info := No_Restrictions;
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-- This variable records restrictions found in any units in the main
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-- extended unit, and in the case of restrictions checked for partition
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-- consistency, restrictions found in any with'ed units, parent specs
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-- etc., since we may as well check as much as we can at compile time.
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-- These variables should not be referenced directly by clients. Instead
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-- use Check_Restriction to record a violation of a restriction, and
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-- Restriction_Active to test if a given restriction is active.
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Restrictions_Loc : array (All_Restrictions) of Source_Ptr :=
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(others => No_Location);
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-- Locations of Restrictions pragmas for error message purposes.
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-- Valid only if corresponding entry in Restrictions is set. A value
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-- of No_Location is used for implicit restrictions set by another
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-- pragma, and a value of System_Location is used for restrictions
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-- set from package Standard by the processing in Targparm.
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Restriction_Profile_Name : array (All_Restrictions) of Profile_Name;
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-- Entries in this array are valid only if the corresponding restriction in
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-- Restrictions is set. The value is the corresponding profile name if the
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-- restriction was set by a Profile or Profile_Warnings pragma. The value
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-- is No_Profile in all other cases.
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Main_Restrictions : Restrictions_Info := No_Restrictions;
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-- This variable records only restrictions found in any units of the
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-- main extended unit. These are the variables used for ali file output,
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-- since we want the binder to be able to accurately diagnose inter-unit
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-- restriction violations.
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Restriction_Warnings : Rident.Restriction_Flags := (others => False);
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-- If one of these flags is set, then it means that violation of the
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-- corresponding restriction results only in a warning message, not
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-- in an error message, and the restriction is not otherwise enforced.
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-- Note that the flags in Restrictions are set to indicate that the
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-- restriction is set in this case, but Main_Restrictions is never
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-- set if Restriction_Warnings is set, so this does not look like a
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-- restriction to the binder.
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-- The following declarations establish a mapping between restriction
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-- identifiers, and the names of corresponding restricted library units.
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type Unit_Entry is record
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Res_Id : Restriction_Id;
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Filenm : String (1 .. 8);
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end record;
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Unit_Array : constant array (Positive range <>) of Unit_Entry := (
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(No_Asynchronous_Control, "a-astaco"),
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(No_Calendar, "a-calend"),
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(No_Calendar, "calendar"),
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(No_Delay, "a-calend"),
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(No_Delay, "calendar"),
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(No_Dynamic_Priorities, "a-dynpri"),
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(No_Finalization, "a-finali"),
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(No_IO, "a-direct"),
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(No_IO, "a-direio"),
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(No_IO, "directio"),
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(No_IO, "a-sequio"),
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(No_IO, "sequenio"),
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(No_IO, "a-ststio"),
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(No_IO, "a-textio"),
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(No_IO, "text_io "),
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(No_IO, "a-witeio"),
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(No_Task_Attributes_Package, "a-tasatt"),
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(No_Unchecked_Conversion, "a-unccon"),
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(No_Unchecked_Conversion, "unchconv"),
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(No_Unchecked_Deallocation, "a-uncdea"),
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(No_Unchecked_Deallocation, "unchdeal"));
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-- The following map has True for all GNAT-defined Restrictions. It is used
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-- to implement pragma Restrictions (No_Implementation_Restrictions) (which
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-- is why this restriction itself is excluded from the list).
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Implementation_Restriction : constant array (All_Restrictions) of Boolean :=
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(Simple_Barriers => True,
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No_Calendar => True,
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No_Default_Initialization => True,
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No_Direct_Boolean_Operators => True,
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No_Dispatching_Calls => True,
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No_Dynamic_Attachment => True,
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No_Elaboration_Code => True,
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No_Enumeration_Maps => True,
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No_Entry_Calls_In_Elaboration_Code => True,
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No_Entry_Queue => True,
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No_Exception_Handlers => True,
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No_Exception_Propagation => True,
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No_Exception_Registration => True,
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No_Finalization => True,
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No_Fixed_IO => True,
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No_Implementation_Attributes => True,
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No_Implementation_Pragmas => True,
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No_Implicit_Conditionals => True,
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No_Implicit_Aliasing => True,
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No_Implicit_Dynamic_Code => True,
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No_Implicit_Loops => True,
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No_Initialize_Scalars => True,
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No_Local_Protected_Objects => True,
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No_Long_Long_Integers => True,
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No_Multiple_Elaboration => True,
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No_Protected_Type_Allocators => True,
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No_Relative_Delay => True,
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No_Requeue_Statements => True,
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No_Secondary_Stack => True,
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No_Select_Statements => True,
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No_Standard_Storage_Pools => True,
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No_Stream_Optimizations => True,
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No_Streams => True,
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No_Task_Attributes_Package => True,
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No_Task_Termination => True,
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No_Tasking => True,
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No_Wide_Characters => True,
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Static_Priorities => True,
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Static_Storage_Size => True,
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Pure_Barriers => True,
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SPARK_05 => True,
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others => False);
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--------------------------
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-- No_Dependences Table --
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--------------------------
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-- The following table records entries made by Restrictions pragmas
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-- that specify a parameter for No_Dependence. Each such pragma makes
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-- an entry in this table.
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-- Note: we have chosen to implement this restriction in the "syntactic"
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-- form, where we do not check that the named package is a language defined
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-- package, but instead we allow arbitrary package names. The discussion of
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-- this issue is not complete in the ARG, but the sense seems to be leaning
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-- in this direction, which makes more sense to us, since it is much more
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-- useful, and much easier to implement.
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type ND_Entry is record
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Unit : Node_Id;
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-- The unit parameter from the No_Dependence pragma
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Warn : Boolean;
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-- True if from Restriction_Warnings, False if from Restrictions
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Profile : Profile_Name;
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-- Set to name of profile from which No_Dependence entry came, or to
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-- No_Profile if a pragma Restriction set the No_Dependence entry.
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end record;
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package No_Dependences is new Table.Table (
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Table_Component_Type => ND_Entry,
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Table_Index_Type => Int,
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Table_Low_Bound => 0,
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Table_Initial => 200,
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Table_Increment => 200,
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Table_Name => "Name_No_Dependences");
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----------------------------
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-- No_Use_Of_Entity Table --
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----------------------------
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-- The following table records entries made by Restrictions pragmas
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-- that specify a parameter for No_Use_Of_Entity. Each such pragma makes
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-- an entry in this table.
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-- Note: we have chosen to implement this restriction in the "syntactic"
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-- form, where we allow arbitrary fully qualified names to be specified.
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type NE_Entry is record
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Entity : Node_Id;
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-- The entity parameter from the No_Use_Of_Entity pragma. This is in
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-- the form of a selected component, since that is the way the parser
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-- processes it, and we don't further analyze it.
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Warn : Boolean;
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-- True if from Restriction_Warnings, False if from Restrictions
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Profile : Profile_Name;
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-- Set to name of profile from which No_Use_Of_Entity entry came, or to
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-- No_Profile if a pragma Restriction set the No_Use_Of_Entity entry.
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end record;
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package No_Use_Of_Entity is new Table.Table (
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Table_Component_Type => NE_Entry,
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Table_Index_Type => Int,
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Table_Low_Bound => 0,
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Table_Initial => 200,
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Table_Increment => 200,
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Table_Name => "Name_No_Use_Of_Entity");
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-- Note that in addition to making an entry in this table, we also set the
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-- Boolean2 flag of the Name_Table entry for the simple name of the entity.
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-- This is used to avoid most useless searches of this table.
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-----------------
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-- Subprograms --
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-----------------
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-- Note: several of these subprograms can generate error messages (e.g.
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-- Check_Restriction). These routines should be called in the analyzer
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-- rather than the expander, so that the associated error messages are
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-- correctly generated in semantics only (-gnatc) mode.
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function Abort_Allowed return Boolean;
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pragma Inline (Abort_Allowed);
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-- Tests to see if abort is allowed by the current restrictions settings.
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-- For abort to be allowed, either No_Abort_Statements must be False,
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-- or Max_Asynchronous_Select_Nesting must be non-zero.
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procedure Check_Compiler_Unit (Feature : String; N : Node_Id);
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-- If unit N is in a unit that has a pragma Compiler_Unit_Warning, then
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-- a message is posted on node N noting use of the given feature is not
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-- permitted in the compiler (bootstrap considerations).
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procedure Check_Compiler_Unit (Feature : String; Loc : Source_Ptr);
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-- If unit N is in a unit that has a pragma Compiler_Unit_Warning, then a
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-- message is posted at location Loc noting use of the given feature is not
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-- permitted in the compiler (bootstrap considerations).
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procedure Check_Restricted_Unit (U : Unit_Name_Type; N : Node_Id);
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-- Checks if loading of unit U is prohibited by the setting of some
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-- restriction (e.g. No_IO restricts the loading of unit Ada.Text_IO).
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-- If a restriction exists post error message at the given node.
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procedure Check_Restriction
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(Msg_Issued : out Boolean;
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R : Restriction_Id;
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N : Node_Id;
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V : Uint := Uint_Minus_1);
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-- Checks that the given restriction is not set, and if it is set, an
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-- appropriate message is posted on the given node, in which case
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-- Msg_Issued is set to True (and False otherwise). Also records the
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-- violation in the appropriate internal arrays. Note that it is mandatory
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-- to always use this routine to check if a restriction is violated. Such
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-- checks must never be done directly by the caller, since otherwise
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-- violations in the absence of restrictions are not properly recorded. The
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-- value of V is relevant only for parameter restrictions, and in this case
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-- indicates the exact count for the violation. If the exact count is not
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-- known, V is left at its default of -1 which indicates an unknown count.
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procedure Check_Restriction
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(R : Restriction_Id;
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N : Node_Id;
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V : Uint := Uint_Minus_1);
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-- Wrapper on Check_Restriction with Msg_Issued, with the out-parameter
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-- being ignored here.
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procedure Check_Restriction_No_Dependence (U : Node_Id; Err : Node_Id);
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-- Called when a dependence on a unit is created (either implicitly, or by
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-- an explicit WITH clause). U is a node for the unit involved, and Err is
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-- the node to which an error will be attached if necessary.
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procedure Check_Restriction_No_Specification_Of_Aspect (N : Node_Id);
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-- N is the node id for an N_Aspect_Specification, an N_Pragma, or an
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-- N_Attribute_Definition_Clause. An error message (warning) will be issued
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-- if a restriction (warning) was previously set for this aspect using
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-- Set_No_Specification_Of_Aspect.
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procedure Check_Restriction_No_Use_Of_Attribute (N : Node_Id);
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-- N denotes an attribute definition clause or an attribute reference. An
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-- error message (warning) will be issued if a restriction (warning) was
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-- previously set for this attribute using Set_No_Use_Of_Attribute.
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procedure Check_Restriction_No_Use_Of_Entity (N : Node_Id);
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-- N is the node id for an entity reference. An error message (warning)
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-- will be issued if a restriction (warning) was previously set for this
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-- entity name using Set_No_Use_Of_Entity.
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procedure Check_Restriction_No_Use_Of_Pragma (N : Node_Id);
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-- N is the node of a pragma. An error message (warning) will be issued
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-- if a restriction (warning) was previously set for this pragma using
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-- Set_No_Use_Of_Pragma.
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procedure Check_Elaboration_Code_Allowed (N : Node_Id);
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-- Tests to see if elaboration code is allowed by the current restrictions
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-- settings. This function is called by Gigi when it needs to define an
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-- elaboration routine. If elaboration code is not allowed, an error
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-- message is posted on the node given as argument.
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-- WARNING: There is a matching C declaration of this subprogram in fe.h
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procedure Check_No_Implicit_Aliasing (Obj : Node_Id);
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-- Obj is a node for which Is_Aliased_View is True, which is being used in
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-- a context (e.g. 'Access) where no implicit aliasing is allowed if the
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-- restriction No_Implicit_Aliasing is set. This procedure checks for the
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-- case where the restriction is active and Obj does not meet the required
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-- rules for avoiding implicit aliases, and issues a restriction message.
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procedure Check_Implicit_Dynamic_Code_Allowed (N : Node_Id);
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-- Tests to see if dynamic code generation (dynamically generated
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-- trampolines, in particular) is allowed by the current restrictions
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-- settings. This function is called by Gigi when it needs to generate code
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-- that generates a trampoline. If not allowed, an error message is posted
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-- on the node given as argument.
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-- WARNING: There is a matching C declaration of this subprogram in fe.h
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procedure Check_No_Implicit_Heap_Alloc (N : Node_Id);
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-- Equivalent to Check_Restriction (No_Implicit_Heap_Allocations, N).
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-- Provided for easy use by back end, which has to check this restriction.
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-- WARNING: There is a matching C declaration of this subprogram in fe.h
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procedure Check_No_Implicit_Protected_Alloc (N : Node_Id);
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-- Equivalent to:
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-- Check_Restriction (No_Implicit_Protected_Object_Allocations, N)
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-- Provided for easy use by back end, which has to check this restriction.
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-- WARNING: There is a matching C declaration of this subprogram in fe.h
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procedure Check_No_Implicit_Task_Alloc (N : Node_Id);
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-- Equivalent to Check_Restriction (No_Implicit_Task_Allocations, N).
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-- Provided for easy use by back end, which has to check this restriction.
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-- WARNING: There is a matching C declaration of this subprogram in fe.h
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procedure Check_Obsolescent_2005_Entity (E : Entity_Id; N : Node_Id);
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-- This routine checks if the entity E is one of the obsolescent entries
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-- in Ada.Characters.Handling in Ada 2005 and No_Obsolescent_Features
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-- restriction is active. If so an appropriate message is given. N is
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-- the node on which the message is to be placed. It's a bit kludgy to
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-- have this highly specialized routine rather than some wonderful general
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-- mechanism (e.g. a special pragma) to handle this case, but there are
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-- only six cases, and it is not worth the effort to do something general.
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procedure Check_Wide_Character_Restriction (E : Entity_Id; N : Node_Id);
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-- This procedure checks if the No_Wide_Character restriction is active,
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-- and if so, if N Comes_From_Source, and the root type of E is one of
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-- [Wide_]Wide_Character or [Wide_]Wide_String, then the restriction
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-- violation is recorded, and an appropriate message given.
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function Get_Restriction_Id
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(N : Name_Id) return Restriction_Id;
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-- Given an identifier name, determines if it is a valid restriction
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-- identifier, and if so returns the corresponding Restriction_Id value,
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-- otherwise returns Not_A_Restriction_Id.
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function OK_No_Dependence_Unit_Name (N : Node_Id) return Boolean;
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-- Used in checking No_Dependence argument of pragma Restrictions or
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-- pragma Restrictions_Warning, or attribute Restriction_Set. Returns
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-- True if N has the proper form for a unit name, False otherwise.
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function OK_No_Use_Of_Entity_Name (N : Node_Id) return Boolean;
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-- Used in checking No_Use_Of_Entity argument of pragma Restrictions or
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-- pragma Restrictions_Warning, or attribute Restriction_Set. Returns
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-- True if N has the proper form for an entity name, False otherwise.
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function No_Exception_Handlers_Set return Boolean;
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-- Test to see if current restrictions settings specify that no exception
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-- handlers are present. This function is called by Gigi when it needs to
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-- expand an AT END clean up identifier with no exception handler. True
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-- will be returned if the configurable run-time is activated, and either
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-- of the restrictions No_Exception_Handlers or No_Exception_Propagation is
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-- set. In the latter case, the source may contain handlers but they either
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-- get converted using the local goto transformation or deleted.
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-- WARNING: There is a matching C declaration of this subprogram in fe.h
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function No_Exception_Propagation_Active return Boolean;
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-- Test to see if current restrictions settings specify that no
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-- exception propagation is activated.
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function Process_Restriction_Synonyms (N : Node_Id) return Name_Id;
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-- Id is a node whose Chars field contains the name of a restriction.
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-- If it is one of synonyms that we allow for historical purposes (for
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-- list see System.Rident), then the proper official name is returned.
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function Restriction_Active (R : All_Restrictions) return Boolean;
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pragma Inline (Restriction_Active);
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-- Determines if a given restriction is active. This call should only be
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-- used where the compiled code depends on whether the restriction is
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-- active. Always use Check_Restriction to record a violation. Note that
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-- this returns False if we only have a Restriction_Warnings set, since
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-- restriction warnings should never affect generated code. If you want
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-- to know if a call to Check_Restriction is needed then use the function
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-- Restriction_Check_Required instead.
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function Restriction_Check_Required (R : All_Restrictions) return Boolean;
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pragma Inline (Restriction_Check_Required);
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-- Determines if either a Restriction_Warnings or Restrictions pragma has
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-- been given for the specified restriction. If true, then a subsequent
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-- call to Check_Restriction is required if the restriction is violated.
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-- This must not be used to guard code generation that depends on whether
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-- a restriction is active (see Restriction_Active above). Typically it
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-- is used to avoid complex code to determine if a restriction is violated,
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-- executing this code only if needed.
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function Restricted_Profile return Boolean;
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-- Tests if set of restrictions corresponding to Restricted_Tasking profile
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-- is currently in effect (set by pragma Profile, or by an appropriate set
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-- of individual Restrictions pragmas). Returns True only if all the
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-- required restrictions are set.
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procedure Set_Global_No_Tasking;
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-- Used in call from Sem_Prag when restriction No_Tasking is set in the
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-- run-time package System or in a configuration pragmas file.
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procedure Set_Profile_Restrictions
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(P : Profile_Name;
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N : Node_Id;
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Warn : Boolean);
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-- Sets the set of restrictions associated with the given profile name. N
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-- is the node of the construct to which error messages are to be attached
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-- as required. Warn is set True for the case of Profile_Warnings where the
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-- restrictions are set as warnings rather than legality requirements, and
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-- is also True for Profile if the Treat_Restrictions_As_Warnings flag is
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-- set. It is false for Profile if this flag is not set.
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procedure Set_Restriction
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(R : All_Boolean_Restrictions;
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N : Node_Id);
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-- N is a node (typically a pragma node) that has the effect of setting
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-- Boolean restriction R. The restriction is set in Restrictions, and
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-- also in Main_Restrictions if this is the main unit.
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procedure Set_Restriction
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(R : All_Parameter_Restrictions;
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N : Node_Id;
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V : Integer);
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-- Similar to the above, except that this is used for the case of a
|
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-- parameter restriction, and the corresponding value V is given.
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procedure Set_Restriction
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(R : All_Restrictions;
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N : Node_Id;
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Warn : Boolean;
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V : Integer := Integer'First);
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|
-- Same as above two, except also takes care of setting the
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-- Restriction_Warnings flag. V is ignored for Boolean
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|
-- restrictions.
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|
--
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-- If this is the first time we've seen this restriction, the warning flag
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|
-- is set to Warn. If this is a second or subsequent time, Warn = False
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|
-- wins; that is, errors always trump warnings. In that case, the warning
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-- flag can be set to False, but never to True.
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procedure Set_Restriction_No_Dependence
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(Unit : Node_Id;
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Warn : Boolean;
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Profile : Profile_Name := No_Profile);
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-- Sets given No_Dependence restriction in table if not there already. Warn
|
|
-- is True if from Restriction_Warnings, or for Restrictions if the flag
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|
-- Treat_Restrictions_As_Warnings is set. False if from Restrictions and
|
|
-- this flag is not set. Profile is set to a non-default value if the
|
|
-- No_Dependence restriction comes from a Profile pragma.
|
|
|
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procedure Set_Restriction_No_Specification_Of_Aspect
|
|
(N : Node_Id;
|
|
Warn : Boolean);
|
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-- N is the node id for an identifier from a pragma Restrictions for the
|
|
-- No_Specification_Of_Aspect pragma. An error message will be issued if
|
|
-- the identifier is not a valid aspect name. Warning is set True for the
|
|
-- case of a Restriction_Warnings pragma specifying this restriction and
|
|
-- False for a Restrictions pragma specifying this restriction.
|
|
|
|
procedure Set_Restriction_No_Specification_Of_Aspect (A_Id : Aspect_Id);
|
|
-- Version used by Get_Target_Parameters (via Tbuild)
|
|
|
|
procedure Set_Restriction_No_Use_Of_Attribute
|
|
(N : Node_Id;
|
|
Warn : Boolean);
|
|
-- N is the node id for the identifier in a pragma Restrictions for
|
|
-- No_Use_Of_Attribute. Caller has verified that this is a valid attribute
|
|
-- designator.
|
|
|
|
procedure Set_Restriction_No_Use_Of_Attribute (A_Id : Attribute_Id);
|
|
-- Version used by Get_Target_Parameters (via Tbuild)
|
|
|
|
procedure Set_Restriction_No_Use_Of_Entity
|
|
(Entity : Node_Id;
|
|
Warn : Boolean;
|
|
Profile : Profile_Name := No_Profile);
|
|
-- Sets given No_Use_Of_Entity restriction in table if not there already.
|
|
-- Warn is True if from Restriction_Warnings, or for Restrictions if the
|
|
-- flag Treat_Restrictions_As_Warnings is set. False if from Restrictions
|
|
-- and this flag is not set. Profile is set to a non-default value if the
|
|
-- No_Dependence restriction comes from a Profile pragma. This procedure
|
|
-- also takes care of setting the Boolean2 flag of the simple name for
|
|
-- the entity (to optimize table searches).
|
|
|
|
procedure Set_Restriction_No_Use_Of_Pragma
|
|
(N : Node_Id;
|
|
Warn : Boolean);
|
|
-- N is the node id for the identifier in a pragma Restrictions for
|
|
-- No_Use_Of_Pragma. Caller has verified that this is a valid pragma id.
|
|
|
|
procedure Set_Restriction_No_Use_Of_Pragma (A_Id : Pragma_Id);
|
|
-- Version used in call from Get_Target_Parameters (via Tbuild).
|
|
|
|
function Tasking_Allowed return Boolean;
|
|
pragma Inline (Tasking_Allowed);
|
|
-- Tests if tasking operations are allowed by the current restrictions
|
|
-- settings. For tasking to be allowed Max_Tasks must be non-zero.
|
|
|
|
function Global_No_Tasking return Boolean;
|
|
-- Returns True if the restriction No_Tasking is set in the run-time
|
|
-- package System or in a configuration pragmas file.
|
|
|
|
----------------------------------------------
|
|
-- Handling of Boolean Compilation Switches --
|
|
----------------------------------------------
|
|
|
|
-- The following declarations are used for proper saving and restoring of
|
|
-- restrictions for separate compilation units. There are two cases:
|
|
|
|
-- For partition-wide restrictions, we just let the restrictions pragmas
|
|
-- pile up, and we never reset them. We might as well detect what we can
|
|
-- at compile time. If e.g. a with'ed unit has a restriction for one of
|
|
-- the partition-wide restrictions, then the binder will enforce it on
|
|
-- all units in the partition, including the unit with the WITH. Although
|
|
-- it would not be wrong to leave this till bind time, we might as well
|
|
-- flag it earlier at compile time.
|
|
|
|
-- For non-partition-wide restrictions, we have quite a different state
|
|
-- of affairs. Here it would be quite wrong to carry a restriction from
|
|
-- a with'ed unit to another with'ed unit, or from a package spec to the
|
|
-- package body. This means that we have to reset these non-partition
|
|
-- wide restrictions at the start of each separate compilation unit. For
|
|
-- units in the extended main program, we need to reset them all to the
|
|
-- values set by the configuration pragma file(s). For units not in the
|
|
-- extended main program, e.g. with'ed units, we might as well reset all
|
|
-- of these restrictions to off (False). The actual initial values will
|
|
-- be taken from the config files active when those units are compiled
|
|
-- as main units.
|
|
|
|
type Save_Cunit_Boolean_Restrictions is private;
|
|
-- Type used for saving and restoring compilation unit restrictions.
|
|
|
|
function Cunit_Boolean_Restrictions_Save
|
|
return Save_Cunit_Boolean_Restrictions;
|
|
-- This function saves the compilation unit restriction settings, leaving
|
|
-- them unchanged. This is used e.g. at the start of processing a context
|
|
-- clause, so that the main unit restrictions can be restored after all
|
|
-- the with'ed units have been processed.
|
|
|
|
procedure Cunit_Boolean_Restrictions_Restore
|
|
(R : Save_Cunit_Boolean_Restrictions);
|
|
-- This is the corresponding restore procedure to restore restrictions
|
|
-- previously saved by Cunit_Boolean_Restrictions_Save. However it does
|
|
-- not reset No_Elaboration_Code, this stays set if it was set before
|
|
-- the call, and also if it is set before the call, then the Config
|
|
-- setting is also updated to include this restriction. This is what
|
|
-- implements the special handling of No_Elaboration_Code.
|
|
|
|
procedure Save_Config_Cunit_Boolean_Restrictions;
|
|
-- This saves the current compilation unit restrictions in an internal
|
|
-- variable, and leaves them unchanged. This is called immediately after
|
|
-- processing the configuration file pragmas, to record the restrictions
|
|
-- set by these configuration file pragmas.
|
|
|
|
procedure Restore_Config_Cunit_Boolean_Restrictions;
|
|
-- This restores the value saved by the previous call to save config values
|
|
-- saved by Save_Config_Cunit_Boolean_Restrictions. It is called at the
|
|
-- start of processing a new unit that is part of the main sources (e.g.
|
|
-- a package spec when the main unit is a package body).
|
|
|
|
procedure Reset_Cunit_Boolean_Restrictions;
|
|
-- Turns off all non-partition-wide boolean restrictions
|
|
|
|
procedure Add_To_Config_Boolean_Restrictions (R : Restriction_Id);
|
|
-- Add specified restriction to stored configuration boolean restrictions.
|
|
-- This is used for handling the special case of No_Elaboration_Code.
|
|
|
|
private
|
|
type Save_Cunit_Boolean_Restrictions is
|
|
array (Cunit_Boolean_Restrictions) of Boolean;
|
|
-- Type used for saving and restoring compilation unit restrictions.
|
|
-- See Compilation_Unit_Restrictions_[Save|Restore] subprograms.
|
|
|
|
end Restrict;
|