1134 lines
57 KiB
Ada
1134 lines
57 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- A S P E C T S --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2010-2020, 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. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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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 defines the aspects that are recognized by GNAT in aspect
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-- specifications. It also contains the subprograms for storing/retrieving
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-- aspect specifications from the tree. The semantic processing for aspect
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-- specifications is found in Sem_Ch13.Analyze_Aspect_Specifications.
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------------------------
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-- Adding New Aspects --
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------------------------
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-- In general, each aspect should have a corresponding pragma or attribute, so
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-- that the newly developed functionality is available for old Ada versions.
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-- When both are defined, it is convenient to first transform the aspect into
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-- an equivalent pragma or attribute in Sem_Ch13.Analyze_Aspect_Specifications
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-- and then analyze that.
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-- To add a new aspect, you need to do the following
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-- 1. Create a name in snames.ads-tmpl
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-- 2. Create a value in type Aspect_Id in this unit
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-- 3. Add a value for the aspect in the global arrays defined in this unit
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-- 4. Add code for the aspect in Sem_Ch13.Analyze_Aspect_Specifications.
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-- This may involve adding some nodes to the tree to perform additional
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-- treatments later.
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-- 5. If the semantic analysis of expressions/names in the aspect should not
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-- occur at the point the aspect is defined, add code in the appropriate
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-- semantic analysis procedure for the aspect. For example, this is the
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-- case for aspects Pre and Post on subprograms, which are preanalyzed
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-- at the end of the declaration list to which the subprogram belongs,
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-- and fully analyzed (possibly with expansion) during the semantic
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-- analysis of subprogram bodies.
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with Namet; use Namet;
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with Snames; use Snames;
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with Types; use Types;
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package Aspects is
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-- Type defining recognized aspects
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type Aspect_Id is
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(No_Aspect, -- Dummy entry for no aspect
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Aspect_Abstract_State, -- GNAT
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Aspect_Address,
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Aspect_Aggregate,
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Aspect_Alignment,
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Aspect_Annotate, -- GNAT
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Aspect_Async_Readers, -- GNAT
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Aspect_Async_Writers, -- GNAT
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Aspect_Attach_Handler,
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Aspect_Bit_Order,
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Aspect_Component_Size,
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Aspect_Constant_After_Elaboration, -- GNAT
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Aspect_Constant_Indexing,
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Aspect_Contract_Cases, -- GNAT
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Aspect_Convention,
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Aspect_CPU,
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Aspect_Default_Component_Value,
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Aspect_Default_Initial_Condition, -- GNAT
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Aspect_Default_Iterator,
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Aspect_Default_Storage_Pool,
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Aspect_Default_Value,
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Aspect_Depends, -- GNAT
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Aspect_Dimension, -- GNAT
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Aspect_Dimension_System, -- GNAT
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Aspect_Dispatching_Domain,
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Aspect_Dynamic_Predicate,
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Aspect_Effective_Reads, -- GNAT
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Aspect_Effective_Writes, -- GNAT
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Aspect_Extensions_Visible, -- GNAT
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Aspect_External_Name,
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Aspect_External_Tag,
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Aspect_Ghost, -- GNAT
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Aspect_Global, -- GNAT
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Aspect_Implicit_Dereference,
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Aspect_Initial_Condition, -- GNAT
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Aspect_Initializes, -- GNAT
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Aspect_Input,
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Aspect_Integer_Literal,
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Aspect_Interrupt_Priority,
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Aspect_Invariant, -- GNAT
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Aspect_Iterator_Element,
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Aspect_Iterable, -- GNAT
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Aspect_Link_Name,
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Aspect_Linker_Section, -- GNAT
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Aspect_Machine_Radix,
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Aspect_Max_Entry_Queue_Depth, -- GNAT
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Aspect_Max_Entry_Queue_Length,
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Aspect_Max_Queue_Length, -- GNAT
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Aspect_No_Caching, -- GNAT
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Aspect_Object_Size, -- GNAT
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Aspect_Obsolescent, -- GNAT
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Aspect_Output,
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Aspect_Part_Of, -- GNAT
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Aspect_Post,
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Aspect_Postcondition,
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Aspect_Pre,
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Aspect_Precondition,
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Aspect_Predicate, -- GNAT
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Aspect_Predicate_Failure,
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Aspect_Priority,
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Aspect_Put_Image,
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Aspect_Read,
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Aspect_Real_Literal,
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Aspect_Refined_Depends, -- GNAT
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Aspect_Refined_Global, -- GNAT
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Aspect_Refined_Post, -- GNAT
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Aspect_Refined_State, -- GNAT
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Aspect_Relative_Deadline,
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Aspect_Relaxed_Initialization, -- GNAT
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Aspect_Scalar_Storage_Order, -- GNAT
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Aspect_Secondary_Stack_Size, -- GNAT
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Aspect_Simple_Storage_Pool, -- GNAT
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Aspect_Size,
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Aspect_Small,
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Aspect_SPARK_Mode, -- GNAT
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Aspect_Static_Predicate,
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Aspect_Storage_Pool,
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Aspect_Storage_Size,
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Aspect_Stream_Size,
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Aspect_String_Literal,
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Aspect_Suppress,
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Aspect_Synchronization,
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Aspect_Test_Case, -- GNAT
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Aspect_Type_Invariant,
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Aspect_Unimplemented, -- GNAT
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Aspect_Unsuppress,
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Aspect_Value_Size, -- GNAT
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Aspect_Variable_Indexing,
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Aspect_Volatile_Function, -- GNAT
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Aspect_Warnings, -- GNAT
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Aspect_Write,
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-- The following aspects correspond to library unit pragmas
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Aspect_All_Calls_Remote,
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Aspect_Elaborate_Body,
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Aspect_No_Elaboration_Code_All, -- GNAT
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Aspect_Preelaborate,
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Aspect_Pure,
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Aspect_Remote_Call_Interface,
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Aspect_Remote_Types,
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Aspect_Shared_Passive,
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Aspect_Universal_Data, -- GNAT
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-- Remaining aspects have a static boolean value that turns the aspect
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-- on or off. They all correspond to pragmas, but are only converted to
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-- the pragmas where the value is True. A value of False normally means
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-- that the aspect is ignored, except in the case of derived types where
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-- the aspect value is inherited from the parent, in which case, we do
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-- not allow False if we inherit a True value from the parent.
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Aspect_Asynchronous,
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Aspect_Atomic,
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Aspect_Atomic_Components,
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Aspect_Disable_Controlled, -- GNAT
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Aspect_Discard_Names,
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Aspect_CUDA_Global, -- GNAT
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Aspect_Export,
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Aspect_Favor_Top_Level, -- GNAT
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Aspect_Independent,
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Aspect_Independent_Components,
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Aspect_Import,
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Aspect_Inline,
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Aspect_Inline_Always, -- GNAT
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Aspect_Interrupt_Handler,
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Aspect_Lock_Free, -- GNAT
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Aspect_No_Inline, -- GNAT
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Aspect_No_Return,
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Aspect_No_Tagged_Streams, -- GNAT
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Aspect_Pack,
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Aspect_Persistent_BSS, -- GNAT
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Aspect_Preelaborable_Initialization,
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Aspect_Pure_Function, -- GNAT
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Aspect_Remote_Access_Type, -- GNAT
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Aspect_Shared, -- GNAT (equivalent to Atomic)
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Aspect_Simple_Storage_Pool_Type, -- GNAT
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Aspect_Static,
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Aspect_Suppress_Debug_Info, -- GNAT
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Aspect_Suppress_Initialization, -- GNAT
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Aspect_Thread_Local_Storage, -- GNAT
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Aspect_Unchecked_Union,
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Aspect_Universal_Aliasing, -- GNAT
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Aspect_Unmodified, -- GNAT
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Aspect_Unreferenced, -- GNAT
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Aspect_Unreferenced_Objects, -- GNAT
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Aspect_Volatile,
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Aspect_Volatile_Components,
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Aspect_Volatile_Full_Access, -- GNAT
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Aspect_Yield);
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subtype Aspect_Id_Exclude_No_Aspect is
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Aspect_Id range Aspect_Id'Succ (No_Aspect) .. Aspect_Id'Last;
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-- Aspect_Id's excluding No_Aspect
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-- The following array indicates aspects that accept 'Class
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Class_Aspect_OK : constant array (Aspect_Id) of Boolean :=
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(Aspect_Input => True,
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Aspect_Invariant => True,
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Aspect_Output => True,
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Aspect_Pre => True,
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Aspect_Predicate => True,
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Aspect_Post => True,
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Aspect_Read => True,
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Aspect_Write => True,
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Aspect_Type_Invariant => True,
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others => False);
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-- The following array identifies all implementation defined aspects
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Implementation_Defined_Aspect : constant array (Aspect_Id) of Boolean :=
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(Aspect_Abstract_State => True,
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Aspect_Annotate => True,
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Aspect_Async_Readers => True,
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Aspect_Async_Writers => True,
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Aspect_Constant_After_Elaboration => True,
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Aspect_Contract_Cases => True,
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Aspect_Depends => True,
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Aspect_Dimension => True,
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Aspect_Dimension_System => True,
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Aspect_Effective_Reads => True,
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Aspect_Effective_Writes => True,
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Aspect_Extensions_Visible => True,
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Aspect_Favor_Top_Level => True,
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Aspect_Ghost => True,
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Aspect_Global => True,
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Aspect_Inline_Always => True,
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Aspect_Invariant => True,
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Aspect_Lock_Free => True,
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Aspect_Max_Entry_Queue_Depth => True,
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Aspect_Max_Entry_Queue_Length => True,
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Aspect_Max_Queue_Length => True,
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Aspect_Object_Size => True,
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Aspect_Persistent_BSS => True,
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Aspect_Predicate => True,
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Aspect_Pure_Function => True,
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Aspect_Relaxed_Initialization => True,
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Aspect_Remote_Access_Type => True,
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Aspect_Scalar_Storage_Order => True,
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Aspect_Secondary_Stack_Size => True,
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Aspect_Shared => True,
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Aspect_Simple_Storage_Pool => True,
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Aspect_Simple_Storage_Pool_Type => True,
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Aspect_Suppress_Debug_Info => True,
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Aspect_Suppress_Initialization => True,
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Aspect_Thread_Local_Storage => True,
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Aspect_Test_Case => True,
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Aspect_Universal_Aliasing => True,
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Aspect_Universal_Data => True,
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Aspect_Unmodified => True,
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Aspect_Unreferenced => True,
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Aspect_Unreferenced_Objects => True,
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Aspect_Value_Size => True,
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Aspect_Volatile_Function => True,
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Aspect_Warnings => True,
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others => False);
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-- The following array indicates aspects that specify operational
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-- characteristics, and thus are view-specific. Representation
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-- aspects break privacy, as they are needed during expansion and
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-- code generation.
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-- List is currently incomplete ???
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Operational_Aspect : constant array (Aspect_Id) of Boolean :=
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(Aspect_Constant_Indexing => True,
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Aspect_Default_Iterator => True,
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Aspect_Iterator_Element => True,
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Aspect_Iterable => True,
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Aspect_Variable_Indexing => True,
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Aspect_Aggregate => True,
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others => False);
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-- The following array indicates aspects for which multiple occurrences of
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-- the same aspect attached to the same declaration are allowed.
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No_Duplicates_Allowed : constant array (Aspect_Id) of Boolean :=
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(Aspect_Annotate => False,
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Aspect_Test_Case => False,
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others => True);
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-- The following subtype defines aspects corresponding to library unit
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-- pragmas, these can only validly appear as aspects for library units,
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-- and result in a corresponding pragma being inserted immediately after
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-- the occurrence of the aspect.
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subtype Library_Unit_Aspects is
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Aspect_Id range Aspect_All_Calls_Remote .. Aspect_Universal_Data;
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-- The following subtype defines aspects accepting an optional static
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-- boolean parameter indicating if the aspect should be active or
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-- cancelling. If the parameter is missing the effective value is True,
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-- enabling the aspect. If the parameter is present it must be a static
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-- expression of type Standard.Boolean. If the value is True, then the
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-- aspect is enabled. If it is False, the aspect is disabled.
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subtype Boolean_Aspects is
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Aspect_Id range Aspect_Asynchronous .. Aspect_Id'Last;
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subtype Pre_Post_Aspects is
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Aspect_Id range Aspect_Post .. Aspect_Precondition;
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-- The following type is used for indicating allowed expression forms
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type Aspect_Expression is
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(Expression, -- Required expression
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Name, -- Required name
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Optional_Expression, -- Optional boolean expression
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Optional_Name); -- Optional name
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-- The following array indicates what argument type is required
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Aspect_Argument : constant array (Aspect_Id) of Aspect_Expression :=
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(No_Aspect => Optional_Expression,
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Aspect_Abstract_State => Expression,
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Aspect_Address => Expression,
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Aspect_Aggregate => Expression,
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Aspect_Alignment => Expression,
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Aspect_Annotate => Expression,
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Aspect_Async_Readers => Optional_Expression,
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Aspect_Async_Writers => Optional_Expression,
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Aspect_Attach_Handler => Expression,
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Aspect_Bit_Order => Expression,
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Aspect_Component_Size => Expression,
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Aspect_Constant_After_Elaboration => Optional_Expression,
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Aspect_Constant_Indexing => Name,
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Aspect_Contract_Cases => Expression,
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Aspect_Convention => Name,
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Aspect_CPU => Expression,
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Aspect_Default_Component_Value => Expression,
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Aspect_Default_Initial_Condition => Optional_Expression,
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Aspect_Default_Iterator => Name,
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Aspect_Default_Storage_Pool => Expression,
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Aspect_Default_Value => Expression,
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Aspect_Depends => Expression,
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Aspect_Dimension => Expression,
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Aspect_Dimension_System => Expression,
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Aspect_Dispatching_Domain => Expression,
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Aspect_Dynamic_Predicate => Expression,
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Aspect_Effective_Reads => Optional_Expression,
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Aspect_Effective_Writes => Optional_Expression,
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Aspect_Extensions_Visible => Optional_Expression,
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Aspect_External_Name => Expression,
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Aspect_External_Tag => Expression,
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Aspect_Ghost => Optional_Expression,
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Aspect_Global => Expression,
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Aspect_Implicit_Dereference => Name,
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Aspect_Initial_Condition => Expression,
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Aspect_Initializes => Expression,
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Aspect_Input => Name,
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Aspect_Integer_Literal => Name,
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Aspect_Interrupt_Priority => Expression,
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Aspect_Invariant => Expression,
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Aspect_Iterable => Expression,
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Aspect_Iterator_Element => Name,
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Aspect_Link_Name => Expression,
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Aspect_Linker_Section => Expression,
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Aspect_Machine_Radix => Expression,
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Aspect_Max_Entry_Queue_Depth => Expression,
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Aspect_Max_Entry_Queue_Length => Expression,
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Aspect_Max_Queue_Length => Expression,
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Aspect_No_Caching => Optional_Expression,
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Aspect_Object_Size => Expression,
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Aspect_Obsolescent => Optional_Expression,
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Aspect_Output => Name,
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Aspect_Part_Of => Expression,
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Aspect_Post => Expression,
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Aspect_Postcondition => Expression,
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Aspect_Pre => Expression,
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Aspect_Precondition => Expression,
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Aspect_Predicate => Expression,
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Aspect_Predicate_Failure => Expression,
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Aspect_Priority => Expression,
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Aspect_Put_Image => Name,
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Aspect_Read => Name,
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Aspect_Real_Literal => Name,
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Aspect_Refined_Depends => Expression,
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Aspect_Refined_Global => Expression,
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Aspect_Refined_Post => Expression,
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Aspect_Refined_State => Expression,
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Aspect_Relative_Deadline => Expression,
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Aspect_Relaxed_Initialization => Optional_Expression,
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Aspect_Scalar_Storage_Order => Expression,
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Aspect_Secondary_Stack_Size => Expression,
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Aspect_Simple_Storage_Pool => Name,
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Aspect_Size => Expression,
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Aspect_Small => Expression,
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Aspect_SPARK_Mode => Optional_Name,
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Aspect_Static_Predicate => Expression,
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Aspect_Storage_Pool => Name,
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Aspect_Storage_Size => Expression,
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Aspect_Stream_Size => Expression,
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Aspect_String_Literal => Name,
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Aspect_Suppress => Name,
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Aspect_Synchronization => Name,
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Aspect_Test_Case => Expression,
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Aspect_Type_Invariant => Expression,
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Aspect_Unimplemented => Optional_Expression,
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Aspect_Unsuppress => Name,
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Aspect_Value_Size => Expression,
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Aspect_Variable_Indexing => Name,
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Aspect_Volatile_Function => Optional_Expression,
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Aspect_Warnings => Name,
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Aspect_Write => Name,
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Boolean_Aspects => Optional_Expression,
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Library_Unit_Aspects => Optional_Expression);
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-- The following array indicates what aspects are representation aspects
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Is_Representation_Aspect : constant array (Aspect_Id) of Boolean :=
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(No_Aspect => False,
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Aspect_Abstract_State => False,
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Aspect_Address => True,
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Aspect_Aggregate => False,
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Aspect_Alignment => True,
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Aspect_Annotate => False,
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Aspect_Async_Readers => False,
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Aspect_Async_Writers => False,
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Aspect_Attach_Handler => False,
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Aspect_Bit_Order => True,
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Aspect_Component_Size => True,
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Aspect_Constant_After_Elaboration => False,
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Aspect_Constant_Indexing => False,
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Aspect_Contract_Cases => False,
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Aspect_Convention => True,
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Aspect_CPU => False,
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Aspect_CUDA_Global => False,
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Aspect_Default_Component_Value => True,
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Aspect_Default_Initial_Condition => False,
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Aspect_Default_Iterator => False,
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Aspect_Default_Storage_Pool => True,
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Aspect_Default_Value => True,
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Aspect_Depends => False,
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Aspect_Dimension => False,
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Aspect_Dimension_System => False,
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Aspect_Dispatching_Domain => False,
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Aspect_Dynamic_Predicate => False,
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Aspect_Effective_Reads => False,
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Aspect_Effective_Writes => False,
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Aspect_Extensions_Visible => False,
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Aspect_External_Name => False,
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Aspect_External_Tag => False,
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Aspect_Ghost => False,
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Aspect_Global => False,
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Aspect_Implicit_Dereference => False,
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Aspect_Initial_Condition => False,
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Aspect_Initializes => False,
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Aspect_Input => False,
|
|
Aspect_Integer_Literal => False,
|
|
Aspect_Interrupt_Priority => False,
|
|
Aspect_Invariant => False,
|
|
Aspect_Iterable => False,
|
|
Aspect_Iterator_Element => False,
|
|
Aspect_Link_Name => True,
|
|
Aspect_Linker_Section => True,
|
|
Aspect_Machine_Radix => True,
|
|
Aspect_Max_Entry_Queue_Depth => False,
|
|
Aspect_Max_Entry_Queue_Length => False,
|
|
Aspect_Max_Queue_Length => False,
|
|
Aspect_No_Caching => False,
|
|
Aspect_Object_Size => True,
|
|
Aspect_Obsolescent => False,
|
|
Aspect_Output => False,
|
|
Aspect_Part_Of => False,
|
|
Aspect_Post => False,
|
|
Aspect_Postcondition => False,
|
|
Aspect_Pre => False,
|
|
Aspect_Precondition => False,
|
|
Aspect_Predicate => False,
|
|
Aspect_Predicate_Failure => False,
|
|
Aspect_Priority => False,
|
|
Aspect_Put_Image => False,
|
|
Aspect_Read => False,
|
|
Aspect_Real_Literal => False,
|
|
Aspect_Refined_Depends => False,
|
|
Aspect_Refined_Global => False,
|
|
Aspect_Refined_Post => False,
|
|
Aspect_Refined_State => False,
|
|
Aspect_Relative_Deadline => False,
|
|
Aspect_Relaxed_Initialization => False,
|
|
Aspect_Scalar_Storage_Order => True,
|
|
Aspect_Secondary_Stack_Size => True,
|
|
Aspect_Simple_Storage_Pool => True,
|
|
Aspect_Size => True,
|
|
Aspect_Small => True,
|
|
Aspect_SPARK_Mode => False,
|
|
Aspect_Static_Predicate => False,
|
|
Aspect_Storage_Pool => True,
|
|
Aspect_Storage_Size => True,
|
|
Aspect_Stream_Size => True,
|
|
Aspect_String_Literal => False,
|
|
Aspect_Suppress => False,
|
|
Aspect_Synchronization => False,
|
|
Aspect_Test_Case => False,
|
|
Aspect_Type_Invariant => False,
|
|
Aspect_Unimplemented => False,
|
|
Aspect_Unsuppress => False,
|
|
Aspect_Value_Size => True,
|
|
Aspect_Variable_Indexing => False,
|
|
Aspect_Volatile_Function => False,
|
|
Aspect_Warnings => False,
|
|
Aspect_Write => False,
|
|
|
|
Library_Unit_Aspects => False,
|
|
|
|
Aspect_Asynchronous => True,
|
|
Aspect_Atomic => True,
|
|
Aspect_Atomic_Components => True,
|
|
Aspect_Disable_Controlled => False,
|
|
Aspect_Discard_Names => True,
|
|
Aspect_Export => True,
|
|
Aspect_Favor_Top_Level => False,
|
|
Aspect_Independent => True,
|
|
Aspect_Independent_Components => True,
|
|
Aspect_Import => True,
|
|
Aspect_Inline => False,
|
|
Aspect_Inline_Always => False,
|
|
Aspect_Interrupt_Handler => False,
|
|
Aspect_Lock_Free => False,
|
|
Aspect_No_Inline => False,
|
|
Aspect_No_Return => False,
|
|
Aspect_No_Tagged_Streams => False,
|
|
Aspect_Pack => True,
|
|
Aspect_Persistent_BSS => True,
|
|
Aspect_Preelaborable_Initialization => False,
|
|
Aspect_Pure_Function => False,
|
|
Aspect_Remote_Access_Type => False,
|
|
Aspect_Shared => True,
|
|
Aspect_Simple_Storage_Pool_Type => True,
|
|
Aspect_Static => False,
|
|
Aspect_Suppress_Debug_Info => False,
|
|
Aspect_Suppress_Initialization => False,
|
|
Aspect_Thread_Local_Storage => True,
|
|
Aspect_Unchecked_Union => True,
|
|
Aspect_Universal_Aliasing => False,
|
|
Aspect_Unmodified => False,
|
|
Aspect_Unreferenced => False,
|
|
Aspect_Unreferenced_Objects => False,
|
|
Aspect_Volatile => True,
|
|
Aspect_Volatile_Components => True,
|
|
Aspect_Volatile_Full_Access => True,
|
|
Aspect_Yield => False);
|
|
|
|
-----------------------------------------
|
|
-- Table Linking Names and Aspect_Id's --
|
|
-----------------------------------------
|
|
|
|
-- Table linking aspect names and id's
|
|
|
|
Aspect_Names : constant array (Aspect_Id) of Name_Id :=
|
|
(No_Aspect => No_Name,
|
|
Aspect_Abstract_State => Name_Abstract_State,
|
|
Aspect_Address => Name_Address,
|
|
Aspect_Aggregate => Name_Aggregate,
|
|
Aspect_Alignment => Name_Alignment,
|
|
Aspect_All_Calls_Remote => Name_All_Calls_Remote,
|
|
Aspect_Annotate => Name_Annotate,
|
|
Aspect_Async_Readers => Name_Async_Readers,
|
|
Aspect_Async_Writers => Name_Async_Writers,
|
|
Aspect_Asynchronous => Name_Asynchronous,
|
|
Aspect_Atomic => Name_Atomic,
|
|
Aspect_Atomic_Components => Name_Atomic_Components,
|
|
Aspect_Attach_Handler => Name_Attach_Handler,
|
|
Aspect_Bit_Order => Name_Bit_Order,
|
|
Aspect_Component_Size => Name_Component_Size,
|
|
Aspect_Constant_After_Elaboration => Name_Constant_After_Elaboration,
|
|
Aspect_Constant_Indexing => Name_Constant_Indexing,
|
|
Aspect_Contract_Cases => Name_Contract_Cases,
|
|
Aspect_Convention => Name_Convention,
|
|
Aspect_CPU => Name_CPU,
|
|
Aspect_CUDA_Global => Name_CUDA_Global,
|
|
Aspect_Default_Component_Value => Name_Default_Component_Value,
|
|
Aspect_Default_Initial_Condition => Name_Default_Initial_Condition,
|
|
Aspect_Default_Iterator => Name_Default_Iterator,
|
|
Aspect_Default_Storage_Pool => Name_Default_Storage_Pool,
|
|
Aspect_Default_Value => Name_Default_Value,
|
|
Aspect_Depends => Name_Depends,
|
|
Aspect_Dimension => Name_Dimension,
|
|
Aspect_Dimension_System => Name_Dimension_System,
|
|
Aspect_Disable_Controlled => Name_Disable_Controlled,
|
|
Aspect_Discard_Names => Name_Discard_Names,
|
|
Aspect_Dispatching_Domain => Name_Dispatching_Domain,
|
|
Aspect_Dynamic_Predicate => Name_Dynamic_Predicate,
|
|
Aspect_Effective_Reads => Name_Effective_Reads,
|
|
Aspect_Effective_Writes => Name_Effective_Writes,
|
|
Aspect_Elaborate_Body => Name_Elaborate_Body,
|
|
Aspect_Export => Name_Export,
|
|
Aspect_Extensions_Visible => Name_Extensions_Visible,
|
|
Aspect_External_Name => Name_External_Name,
|
|
Aspect_External_Tag => Name_External_Tag,
|
|
Aspect_Favor_Top_Level => Name_Favor_Top_Level,
|
|
Aspect_Ghost => Name_Ghost,
|
|
Aspect_Global => Name_Global,
|
|
Aspect_Implicit_Dereference => Name_Implicit_Dereference,
|
|
Aspect_Import => Name_Import,
|
|
Aspect_Independent => Name_Independent,
|
|
Aspect_Independent_Components => Name_Independent_Components,
|
|
Aspect_Inline => Name_Inline,
|
|
Aspect_Inline_Always => Name_Inline_Always,
|
|
Aspect_Initial_Condition => Name_Initial_Condition,
|
|
Aspect_Initializes => Name_Initializes,
|
|
Aspect_Input => Name_Input,
|
|
Aspect_Integer_Literal => Name_Integer_Literal,
|
|
Aspect_Interrupt_Handler => Name_Interrupt_Handler,
|
|
Aspect_Interrupt_Priority => Name_Interrupt_Priority,
|
|
Aspect_Invariant => Name_Invariant,
|
|
Aspect_Iterator_Element => Name_Iterator_Element,
|
|
Aspect_Iterable => Name_Iterable,
|
|
Aspect_Link_Name => Name_Link_Name,
|
|
Aspect_Linker_Section => Name_Linker_Section,
|
|
Aspect_Lock_Free => Name_Lock_Free,
|
|
Aspect_Machine_Radix => Name_Machine_Radix,
|
|
Aspect_Max_Entry_Queue_Depth => Name_Max_Entry_Queue_Depth,
|
|
Aspect_Max_Entry_Queue_Length => Name_Max_Entry_Queue_Length,
|
|
Aspect_Max_Queue_Length => Name_Max_Queue_Length,
|
|
Aspect_No_Caching => Name_No_Caching,
|
|
Aspect_No_Elaboration_Code_All => Name_No_Elaboration_Code_All,
|
|
Aspect_No_Inline => Name_No_Inline,
|
|
Aspect_No_Return => Name_No_Return,
|
|
Aspect_No_Tagged_Streams => Name_No_Tagged_Streams,
|
|
Aspect_Object_Size => Name_Object_Size,
|
|
Aspect_Obsolescent => Name_Obsolescent,
|
|
Aspect_Output => Name_Output,
|
|
Aspect_Pack => Name_Pack,
|
|
Aspect_Part_Of => Name_Part_Of,
|
|
Aspect_Persistent_BSS => Name_Persistent_BSS,
|
|
Aspect_Post => Name_Post,
|
|
Aspect_Postcondition => Name_Postcondition,
|
|
Aspect_Pre => Name_Pre,
|
|
Aspect_Precondition => Name_Precondition,
|
|
Aspect_Predicate => Name_Predicate,
|
|
Aspect_Predicate_Failure => Name_Predicate_Failure,
|
|
Aspect_Preelaborable_Initialization => Name_Preelaborable_Initialization,
|
|
Aspect_Preelaborate => Name_Preelaborate,
|
|
Aspect_Priority => Name_Priority,
|
|
Aspect_Pure => Name_Pure,
|
|
Aspect_Pure_Function => Name_Pure_Function,
|
|
Aspect_Put_Image => Name_Put_Image,
|
|
Aspect_Read => Name_Read,
|
|
Aspect_Real_Literal => Name_Real_Literal,
|
|
Aspect_Refined_Depends => Name_Refined_Depends,
|
|
Aspect_Refined_Global => Name_Refined_Global,
|
|
Aspect_Refined_Post => Name_Refined_Post,
|
|
Aspect_Refined_State => Name_Refined_State,
|
|
Aspect_Relative_Deadline => Name_Relative_Deadline,
|
|
Aspect_Relaxed_Initialization => Name_Relaxed_Initialization,
|
|
Aspect_Remote_Access_Type => Name_Remote_Access_Type,
|
|
Aspect_Remote_Call_Interface => Name_Remote_Call_Interface,
|
|
Aspect_Remote_Types => Name_Remote_Types,
|
|
Aspect_Scalar_Storage_Order => Name_Scalar_Storage_Order,
|
|
Aspect_Secondary_Stack_Size => Name_Secondary_Stack_Size,
|
|
Aspect_Shared => Name_Shared,
|
|
Aspect_Shared_Passive => Name_Shared_Passive,
|
|
Aspect_Simple_Storage_Pool => Name_Simple_Storage_Pool,
|
|
Aspect_Simple_Storage_Pool_Type => Name_Simple_Storage_Pool_Type,
|
|
Aspect_Size => Name_Size,
|
|
Aspect_Small => Name_Small,
|
|
Aspect_SPARK_Mode => Name_SPARK_Mode,
|
|
Aspect_Static => Name_Static,
|
|
Aspect_Static_Predicate => Name_Static_Predicate,
|
|
Aspect_Storage_Pool => Name_Storage_Pool,
|
|
Aspect_Storage_Size => Name_Storage_Size,
|
|
Aspect_Stream_Size => Name_Stream_Size,
|
|
Aspect_String_Literal => Name_String_Literal,
|
|
Aspect_Suppress => Name_Suppress,
|
|
Aspect_Suppress_Debug_Info => Name_Suppress_Debug_Info,
|
|
Aspect_Suppress_Initialization => Name_Suppress_Initialization,
|
|
Aspect_Thread_Local_Storage => Name_Thread_Local_Storage,
|
|
Aspect_Synchronization => Name_Synchronization,
|
|
Aspect_Test_Case => Name_Test_Case,
|
|
Aspect_Type_Invariant => Name_Type_Invariant,
|
|
Aspect_Unchecked_Union => Name_Unchecked_Union,
|
|
Aspect_Unimplemented => Name_Unimplemented,
|
|
Aspect_Universal_Aliasing => Name_Universal_Aliasing,
|
|
Aspect_Universal_Data => Name_Universal_Data,
|
|
Aspect_Unmodified => Name_Unmodified,
|
|
Aspect_Unreferenced => Name_Unreferenced,
|
|
Aspect_Unreferenced_Objects => Name_Unreferenced_Objects,
|
|
Aspect_Unsuppress => Name_Unsuppress,
|
|
Aspect_Value_Size => Name_Value_Size,
|
|
Aspect_Variable_Indexing => Name_Variable_Indexing,
|
|
Aspect_Volatile => Name_Volatile,
|
|
Aspect_Volatile_Components => Name_Volatile_Components,
|
|
Aspect_Volatile_Full_Access => Name_Volatile_Full_Access,
|
|
Aspect_Volatile_Function => Name_Volatile_Function,
|
|
Aspect_Warnings => Name_Warnings,
|
|
Aspect_Write => Name_Write,
|
|
Aspect_Yield => Name_Yield);
|
|
|
|
function Get_Aspect_Id (Name : Name_Id) return Aspect_Id;
|
|
pragma Inline (Get_Aspect_Id);
|
|
-- Given a name Nam, returns the corresponding aspect id value. If the name
|
|
-- does not match any aspect, then No_Aspect is returned as the result.
|
|
|
|
function Get_Aspect_Id (Aspect : Node_Id) return Aspect_Id;
|
|
pragma Inline (Get_Aspect_Id);
|
|
-- Given an aspect specification, return the corresponding aspect_id value.
|
|
-- If the name does not match any aspect, return No_Aspect.
|
|
|
|
------------------------------------
|
|
-- Delaying Evaluation of Aspects --
|
|
------------------------------------
|
|
|
|
-- The RM requires that all language defined aspects taking an expression
|
|
-- delay evaluation of the expression till the freeze point of the entity
|
|
-- to which the aspect applies. This allows forward references, and is of
|
|
-- use for example in connection with preconditions and postconditions
|
|
-- where the requirement of making all references in contracts to local
|
|
-- functions be backwards references would be onerous.
|
|
|
|
-- For consistency, even attributes like Size are delayed, so we can do:
|
|
|
|
-- type A is range 1 .. 10
|
|
-- with Size => Not_Defined_Yet;
|
|
-- ..
|
|
-- Not_Defined_Yet : constant := 64;
|
|
|
|
-- Resulting in A having a size of 64, which gets set when A is frozen.
|
|
-- Furthermore, we can have a situation like
|
|
|
|
-- type A is range 1 .. 10
|
|
-- with Size => Not_Defined_Yet;
|
|
-- ..
|
|
-- type B is new A;
|
|
-- ..
|
|
-- Not_Defined_Yet : constant := 64;
|
|
|
|
-- where the Size of A is considered to have been previously specified at
|
|
-- the point of derivation, even though the actual value of the size is
|
|
-- not known yet, and in this example B inherits the size value of 64.
|
|
|
|
-- Our normal implementation model (prior to Ada 2012) was simply to copy
|
|
-- inheritable attributes at the point of derivation. Then any subsequent
|
|
-- representation items apply either to the parent type, not affecting the
|
|
-- derived type, or to the derived type, not affecting the parent type.
|
|
|
|
-- To deal with the delayed aspect case, we use two flags. The first is
|
|
-- set on the parent type if it has delayed representation aspects. This
|
|
-- flag Has_Delayed_Rep_Aspects indicates that if we derive from this type
|
|
-- we have to worry about making sure we inherit any delayed aspects. The
|
|
-- second flag is set on a derived type: May_Have_Inherited_Rep_Aspects
|
|
-- is set if the parent type has Has_Delayed_Rep_Aspects set.
|
|
|
|
-- When we freeze a derived type, if the May_Have_Inherited_Rep_Aspects
|
|
-- flag is set, then we call Freeze.Inherit_Delayed_Rep_Aspects when
|
|
-- the derived type is frozen, which deals with the necessary copying of
|
|
-- information from the parent type, which must be frozen at that point
|
|
-- (since freezing the derived type first freezes the parent type).
|
|
|
|
-- SPARK 2014 aspects do not follow the general delay mechanism as they
|
|
-- act as annotations and cannot modify the attributes of their related
|
|
-- constructs. To handle forward references in such aspects, the compiler
|
|
-- delays the analysis of their respective pragmas by collecting them in
|
|
-- N_Contract nodes. The pragmas are then analyzed at the end of the
|
|
-- declarative region containing the related construct. For details,
|
|
-- see routines Analyze_xxx_In_Decl_Part.
|
|
|
|
-- The following shows which aspects are delayed. There are three cases:
|
|
|
|
type Delay_Type is
|
|
(Always_Delay,
|
|
-- This aspect is not a representation aspect that can be inherited and
|
|
-- is always delayed, as required by the language definition.
|
|
|
|
Never_Delay,
|
|
-- There are two cases. There are language defined aspects like
|
|
-- Convention where the "expression" is simply an uninterpreted
|
|
-- identifier, and there is no issue of evaluating it and thus no
|
|
-- issue of delaying the evaluation. The second case is implementation
|
|
-- defined aspects where we have decided that we don't want to allow
|
|
-- delays (and for our own aspects we can do what we like).
|
|
|
|
Rep_Aspect);
|
|
-- These are the cases of representation aspects that are in general
|
|
-- delayed, and where there is a potential issue of derived types that
|
|
-- inherit delayed representation values.
|
|
|
|
-- Note: even if this table indicates that an aspect is delayed, we never
|
|
-- delay Boolean aspects that have a missing expression (taken as True),
|
|
-- or expressions for delayed rep items that consist of an integer literal
|
|
-- (most cases of Size etc. in practice), since in these cases we know we
|
|
-- can get the value of the expression without delay. Note that we still
|
|
-- need to delay Boolean aspects that are specifically set to True:
|
|
|
|
-- type R is array (0 .. 31) of Boolean
|
|
-- with Pack => True;
|
|
-- True : constant Boolean := False;
|
|
|
|
-- This is nonsense, but we need to make it work and result in R not
|
|
-- being packed, and if we have something like:
|
|
|
|
-- type R is array (0 .. 31) of Boolean
|
|
-- with Pack => True;
|
|
-- RR : R;
|
|
-- True : constant Boolean := False;
|
|
|
|
-- This is illegal because the visibility of True changes after the freeze
|
|
-- point, which is not allowed, and we need the delay mechanism to properly
|
|
-- diagnose this error.
|
|
|
|
Aspect_Delay : constant array (Aspect_Id) of Delay_Type :=
|
|
(No_Aspect => Always_Delay,
|
|
Aspect_Address => Always_Delay,
|
|
Aspect_Aggregate => Always_Delay,
|
|
Aspect_All_Calls_Remote => Always_Delay,
|
|
Aspect_Asynchronous => Always_Delay,
|
|
Aspect_Attach_Handler => Always_Delay,
|
|
Aspect_Constant_Indexing => Always_Delay,
|
|
Aspect_CPU => Always_Delay,
|
|
Aspect_CUDA_Global => Always_Delay,
|
|
Aspect_Default_Iterator => Always_Delay,
|
|
Aspect_Default_Storage_Pool => Always_Delay,
|
|
Aspect_Default_Value => Always_Delay,
|
|
Aspect_Default_Component_Value => Always_Delay,
|
|
Aspect_Discard_Names => Always_Delay,
|
|
Aspect_Dispatching_Domain => Always_Delay,
|
|
Aspect_Dynamic_Predicate => Always_Delay,
|
|
Aspect_Elaborate_Body => Always_Delay,
|
|
Aspect_External_Name => Always_Delay,
|
|
Aspect_External_Tag => Always_Delay,
|
|
Aspect_Favor_Top_Level => Always_Delay,
|
|
Aspect_Implicit_Dereference => Always_Delay,
|
|
Aspect_Independent => Always_Delay,
|
|
Aspect_Independent_Components => Always_Delay,
|
|
Aspect_Inline => Always_Delay,
|
|
Aspect_Inline_Always => Always_Delay,
|
|
Aspect_Input => Always_Delay,
|
|
Aspect_Integer_Literal => Always_Delay,
|
|
Aspect_Interrupt_Handler => Always_Delay,
|
|
Aspect_Interrupt_Priority => Always_Delay,
|
|
Aspect_Invariant => Always_Delay,
|
|
Aspect_Iterable => Always_Delay,
|
|
Aspect_Iterator_Element => Always_Delay,
|
|
Aspect_Link_Name => Always_Delay,
|
|
Aspect_Linker_Section => Always_Delay,
|
|
Aspect_Lock_Free => Always_Delay,
|
|
Aspect_No_Inline => Always_Delay,
|
|
Aspect_No_Return => Always_Delay,
|
|
Aspect_Output => Always_Delay,
|
|
Aspect_Persistent_BSS => Always_Delay,
|
|
Aspect_Post => Always_Delay,
|
|
Aspect_Postcondition => Always_Delay,
|
|
Aspect_Pre => Always_Delay,
|
|
Aspect_Precondition => Always_Delay,
|
|
Aspect_Predicate => Always_Delay,
|
|
Aspect_Predicate_Failure => Always_Delay,
|
|
Aspect_Preelaborable_Initialization => Always_Delay,
|
|
Aspect_Preelaborate => Always_Delay,
|
|
Aspect_Priority => Always_Delay,
|
|
Aspect_Pure => Always_Delay,
|
|
Aspect_Pure_Function => Always_Delay,
|
|
Aspect_Put_Image => Always_Delay,
|
|
Aspect_Read => Always_Delay,
|
|
Aspect_Real_Literal => Always_Delay,
|
|
Aspect_Relative_Deadline => Always_Delay,
|
|
Aspect_Remote_Access_Type => Always_Delay,
|
|
Aspect_Remote_Call_Interface => Always_Delay,
|
|
Aspect_Remote_Types => Always_Delay,
|
|
Aspect_Secondary_Stack_Size => Always_Delay,
|
|
Aspect_Shared => Always_Delay,
|
|
Aspect_Shared_Passive => Always_Delay,
|
|
Aspect_Simple_Storage_Pool => Always_Delay,
|
|
Aspect_Simple_Storage_Pool_Type => Always_Delay,
|
|
Aspect_Static_Predicate => Always_Delay,
|
|
Aspect_Storage_Pool => Always_Delay,
|
|
Aspect_Stream_Size => Always_Delay,
|
|
Aspect_String_Literal => Always_Delay,
|
|
Aspect_Suppress => Always_Delay,
|
|
Aspect_Suppress_Debug_Info => Always_Delay,
|
|
Aspect_Suppress_Initialization => Always_Delay,
|
|
Aspect_Thread_Local_Storage => Always_Delay,
|
|
Aspect_Type_Invariant => Always_Delay,
|
|
Aspect_Unchecked_Union => Always_Delay,
|
|
Aspect_Universal_Aliasing => Always_Delay,
|
|
Aspect_Universal_Data => Always_Delay,
|
|
Aspect_Unmodified => Always_Delay,
|
|
Aspect_Unreferenced => Always_Delay,
|
|
Aspect_Unreferenced_Objects => Always_Delay,
|
|
Aspect_Unsuppress => Always_Delay,
|
|
Aspect_Variable_Indexing => Always_Delay,
|
|
Aspect_Write => Always_Delay,
|
|
|
|
Aspect_Abstract_State => Never_Delay,
|
|
Aspect_Annotate => Never_Delay,
|
|
Aspect_Async_Readers => Never_Delay,
|
|
Aspect_Async_Writers => Never_Delay,
|
|
Aspect_Constant_After_Elaboration => Never_Delay,
|
|
Aspect_Contract_Cases => Never_Delay,
|
|
Aspect_Convention => Never_Delay,
|
|
Aspect_Default_Initial_Condition => Never_Delay,
|
|
Aspect_Depends => Never_Delay,
|
|
Aspect_Dimension => Never_Delay,
|
|
Aspect_Dimension_System => Never_Delay,
|
|
Aspect_Disable_Controlled => Never_Delay,
|
|
Aspect_Effective_Reads => Never_Delay,
|
|
Aspect_Effective_Writes => Never_Delay,
|
|
Aspect_Export => Never_Delay,
|
|
Aspect_Extensions_Visible => Never_Delay,
|
|
Aspect_Ghost => Never_Delay,
|
|
Aspect_Global => Never_Delay,
|
|
Aspect_Import => Never_Delay,
|
|
Aspect_Initial_Condition => Never_Delay,
|
|
Aspect_Initializes => Never_Delay,
|
|
Aspect_Max_Entry_Queue_Depth => Never_Delay,
|
|
Aspect_Max_Entry_Queue_Length => Never_Delay,
|
|
Aspect_Max_Queue_Length => Never_Delay,
|
|
Aspect_No_Caching => Never_Delay,
|
|
Aspect_No_Elaboration_Code_All => Never_Delay,
|
|
Aspect_No_Tagged_Streams => Never_Delay,
|
|
Aspect_Obsolescent => Never_Delay,
|
|
Aspect_Part_Of => Never_Delay,
|
|
Aspect_Refined_Depends => Never_Delay,
|
|
Aspect_Refined_Global => Never_Delay,
|
|
Aspect_Refined_Post => Never_Delay,
|
|
Aspect_Refined_State => Never_Delay,
|
|
Aspect_Relaxed_Initialization => Never_Delay,
|
|
Aspect_SPARK_Mode => Never_Delay,
|
|
Aspect_Static => Never_Delay,
|
|
Aspect_Synchronization => Never_Delay,
|
|
Aspect_Test_Case => Never_Delay,
|
|
Aspect_Unimplemented => Never_Delay,
|
|
Aspect_Volatile_Function => Never_Delay,
|
|
Aspect_Warnings => Never_Delay,
|
|
Aspect_Yield => Never_Delay,
|
|
|
|
Aspect_Alignment => Rep_Aspect,
|
|
Aspect_Atomic => Rep_Aspect,
|
|
Aspect_Atomic_Components => Rep_Aspect,
|
|
Aspect_Bit_Order => Rep_Aspect,
|
|
Aspect_Component_Size => Rep_Aspect,
|
|
Aspect_Machine_Radix => Rep_Aspect,
|
|
Aspect_Object_Size => Rep_Aspect,
|
|
Aspect_Pack => Rep_Aspect,
|
|
Aspect_Scalar_Storage_Order => Rep_Aspect,
|
|
Aspect_Size => Rep_Aspect,
|
|
Aspect_Small => Rep_Aspect,
|
|
Aspect_Storage_Size => Rep_Aspect,
|
|
Aspect_Value_Size => Rep_Aspect,
|
|
Aspect_Volatile => Rep_Aspect,
|
|
Aspect_Volatile_Components => Rep_Aspect,
|
|
Aspect_Volatile_Full_Access => Rep_Aspect);
|
|
|
|
------------------------------------------------
|
|
-- Handling of Aspect Specifications on Stubs --
|
|
------------------------------------------------
|
|
|
|
-- Aspects that appear on the following stub nodes
|
|
|
|
-- N_Package_Body_Stub
|
|
-- N_Protected_Body_Stub
|
|
-- N_Subprogram_Body_Stub
|
|
-- N_Task_Body_Stub
|
|
|
|
-- are treated as if they apply to the corresponding proper body. Their
|
|
-- analysis is postponed until the analysis of the proper body takes place
|
|
-- (see Analyze_Proper_Body). The delay is required because the analysis
|
|
-- may generate extra code which would be harder to relocate to the body.
|
|
-- If the proper body is present, the aspect specifications are relocated
|
|
-- to the corresponding body node:
|
|
|
|
-- N_Package_Body
|
|
-- N_Protected_Body
|
|
-- N_Subprogram_Body
|
|
-- N_Task_Body
|
|
|
|
-- The subsequent analysis takes care of the aspect-to-pragma conversions
|
|
-- and verification of pragma legality. In the case where the proper body
|
|
-- is not available, the aspect specifications are analyzed on the spot
|
|
-- (see Analyze_Proper_Body) to catch potential errors.
|
|
|
|
-- The following table lists all aspects that can apply to a subprogram
|
|
-- body [stub]. For instance, the following example is legal:
|
|
|
|
-- package P with SPARK_Mode ...;
|
|
-- package body P with SPARK_Mode is ...;
|
|
|
|
-- The table should be synchronized with Pragma_On_Body_Or_Stub_OK in unit
|
|
-- Sem_Prag.
|
|
|
|
Aspect_On_Body_Or_Stub_OK : constant array (Aspect_Id) of Boolean :=
|
|
(Aspect_Refined_Depends => True,
|
|
Aspect_Refined_Global => True,
|
|
Aspect_Refined_Post => True,
|
|
Aspect_SPARK_Mode => True,
|
|
Aspect_Warnings => True,
|
|
others => False);
|
|
|
|
-------------------------------------------------------------------
|
|
-- Handling of Aspects Specifications on Single Concurrent Types --
|
|
-------------------------------------------------------------------
|
|
|
|
-- Certain aspects that appear on the following nodes
|
|
|
|
-- N_Single_Protected_Declaration
|
|
-- N_Single_Task_Declaration
|
|
|
|
-- are treated as if they apply to the anonymous object produced by the
|
|
-- analysis of a single concurrent type. The following table lists all
|
|
-- aspects that should apply to the anonymous object. The table should
|
|
-- be synchronized with Pragma_On_Anonymous_Object_OK in unit Sem_Prag.
|
|
|
|
Aspect_On_Anonymous_Object_OK : constant array (Aspect_Id) of Boolean :=
|
|
(Aspect_Depends => True,
|
|
Aspect_Global => True,
|
|
Aspect_Part_Of => True,
|
|
others => False);
|
|
|
|
---------------------------------------------------
|
|
-- Handling of Aspect Specifications in the Tree --
|
|
---------------------------------------------------
|
|
|
|
-- Several kinds of declaration node permit aspect specifications in Ada
|
|
-- 2012 mode. If there was room in all the corresponding declaration nodes,
|
|
-- we could just have a field Aspect_Specifications pointing to a list of
|
|
-- nodes for the aspects (N_Aspect_Specification nodes). But there isn't
|
|
-- room, so we adopt a different approach.
|
|
|
|
-- The following subprograms provide access to a specialized interface
|
|
-- implemented internally with a hash table in the body, that provides
|
|
-- access to aspect specifications.
|
|
|
|
function Aspect_Specifications (N : Node_Id) return List_Id;
|
|
-- Given a node N, returns the list of N_Aspect_Specification nodes that
|
|
-- are attached to this declaration node. If the node is in the class of
|
|
-- declaration nodes that permit aspect specifications, as defined by the
|
|
-- predicate above, and if their Has_Aspects flag is set to True, then this
|
|
-- will always be a non-empty list. If this flag is set to False, then
|
|
-- No_List is returned. Normally, the only nodes that have Has_Aspects set
|
|
-- True are the nodes for which Permits_Aspect_Specifications would return
|
|
-- True (i.e. the declaration nodes defined in the RM as permitting the
|
|
-- presence of Aspect_Specifications). However, it is possible for the
|
|
-- flag Has_Aspects to be set on other nodes as a result of Rewrite and
|
|
-- Replace calls, and this function may be used to retrieve the aspect
|
|
-- specifications for the original rewritten node in such cases.
|
|
|
|
function Aspects_On_Body_Or_Stub_OK (N : Node_Id) return Boolean;
|
|
-- N denotes a body [stub] with aspects. Determine whether all aspects of N
|
|
-- are allowed to appear on a body [stub].
|
|
|
|
procedure Exchange_Aspects (N1 : Node_Id; N2 : Node_Id);
|
|
-- Exchange the aspect specifications of two nodes. If either node lacks an
|
|
-- aspect specification list, the routine has no effect. It is assumed that
|
|
-- both nodes can support aspects.
|
|
|
|
function Find_Aspect (Id : Entity_Id; A : Aspect_Id) return Node_Id;
|
|
-- Find the aspect specification of aspect A associated with entity I.
|
|
-- Return Empty if Id does not have the requested aspect.
|
|
|
|
function Find_Value_Of_Aspect
|
|
(Id : Entity_Id;
|
|
A : Aspect_Id) return Node_Id;
|
|
-- Find the value of aspect A associated with entity Id. Return Empty if
|
|
-- Id does not have the requested aspect.
|
|
|
|
function Has_Aspect (Id : Entity_Id; A : Aspect_Id) return Boolean;
|
|
-- Determine whether entity Id has aspect A
|
|
|
|
procedure Move_Aspects (From : Node_Id; To : Node_Id);
|
|
-- Relocate the aspect specifications of node From to node To. On entry it
|
|
-- is assumed that To does not have aspect specifications. If From has no
|
|
-- aspects, the routine has no effect.
|
|
|
|
procedure Move_Or_Merge_Aspects (From : Node_Id; To : Node_Id);
|
|
-- Relocate the aspect specifications of node From to node To. If To has
|
|
-- aspects, the aspects of From are appended to the aspects of To. If From
|
|
-- has no aspects, the routine has no effect. Special behavior:
|
|
-- * When node From denotes a subprogram body stub without a previous
|
|
-- declaration, the only aspects relocated to node To are those found
|
|
-- in table Aspect_On_Body_Or_Stub_OK.
|
|
-- * When node From denotes a single synchronized type declaration, the
|
|
-- only aspects relocated to node To are those found in table
|
|
-- Aspect_On_Anonymous_Object_OK.
|
|
|
|
function Permits_Aspect_Specifications (N : Node_Id) return Boolean;
|
|
-- Returns True if the node N is a declaration node that permits aspect
|
|
-- specifications in the grammar. It is possible for other nodes to have
|
|
-- aspect specifications as a result of Rewrite or Replace calls.
|
|
|
|
procedure Remove_Aspects (N : Node_Id);
|
|
-- Delete the aspect specifications associated with node N. If the node has
|
|
-- no aspects, the routine has no effect.
|
|
|
|
function Same_Aspect (A1 : Aspect_Id; A2 : Aspect_Id) return Boolean;
|
|
-- Returns True if A1 and A2 are (essentially) the same aspect. This is not
|
|
-- a simple equality test because e.g. Post and Postcondition are the same.
|
|
-- This is used for detecting duplicate aspects.
|
|
|
|
procedure Set_Aspect_Specifications (N : Node_Id; L : List_Id);
|
|
-- The node N must be in the class of declaration nodes that permit aspect
|
|
-- specifications and the Has_Aspects flag must be False on entry. L must
|
|
-- be a non-empty list of N_Aspect_Specification nodes. This procedure sets
|
|
-- the Has_Aspects flag to True, and makes an entry that can be retrieved
|
|
-- by a subsequent Aspect_Specifications call. It is an error to call this
|
|
-- procedure with a node that does not permit aspect specifications, or a
|
|
-- node that has its Has_Aspects flag set True on entry, or with L being an
|
|
-- empty list or No_List.
|
|
|
|
end Aspects;
|