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-------------------------------------------------------------------------------
-- (C) Altran Praxis Limited
-------------------------------------------------------------------------------
--
-- The SPARK toolset is free software; you can redistribute it and/or modify it
-- under terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 3, or (at your option) any later
-- version. The SPARK toolset is distributed in the hope that it will be
-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-- Public License for more details. You should have received a copy of the GNU
-- General Public License distributed with the SPARK toolset; see file
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy of
-- the license.
--
--=============================================================================
with Dictionary;
with ExaminerConstants;
with Heap;
with LexTokenManager;
with SeqAlgebra;
use type Dictionary.Symbol;
use type LexTokenManager.Token_Position;
--# inherit Dictionary,
--# ExaminerConstants,
--# Heap,
--# LexTokenManager,
--# SeqAlgebra,
--# Statistics,
--# SystemErrors;
package ComponentErrors is
MaxNumComponentErrors : constant Natural := ExaminerConstants.MaxRecordErrors;
subtype ComponentError is Natural range 0 .. MaxNumComponentErrors;
NullComponentError : constant ComponentError := 0;
type HeapOfErrors is private;
type ErrorClass is (
DataFlow,
IneffectiveStmt,
IneffectiveFieldAssignment,
Dependency,
Usage,
SemanticWarning);
procedure Initialise (TheErrorHeap : out HeapOfErrors);
--# derives TheErrorHeap from ;
-- Creates a new component error on TheErrorheap from the given
-- error class, error value, position and sym.
procedure CreateError
(TheErrorHeap : in out HeapOfErrors;
HeapSeq : in out Heap.HeapRecord;
ErrClass : in ErrorClass;
ErrVal : in Natural;
Position : in LexTokenManager.Token_Position;
Sym : in Dictionary.Symbol;
NewError : out ComponentError);
--# global in out Statistics.TableUsage;
--# derives HeapSeq from * &
--# NewError from TheErrorHeap &
--# Statistics.TableUsage from *,
--# HeapSeq,
--# TheErrorHeap &
--# TheErrorHeap from *,
--# ErrClass,
--# ErrVal,
--# HeapSeq,
--# Position,
--# Sym;
-- Disposes of component error on TheErrorHeap.
procedure DisposeOfError (TheErrorHeap : in out HeapOfErrors;
HeapSeq : in out Heap.HeapRecord;
OldError : in ComponentError);
--# derives HeapSeq,
--# TheErrorHeap from *,
--# OldError,
--# TheErrorHeap;
-- Returns true if ErrClass, ErrVal, Position and Sym are the same
-- in the error descriptors referred to by Error1 and Error2.
-- Otherwise it returns false.
function IsSameError
(TheErrorHeap : HeapOfErrors;
Error1 : ComponentError;
Error2 : ComponentError)
return Boolean;
function ClassOfError (TheErrorHeap : HeapOfErrors;
Error : ComponentError) return ErrorClass;
function ValueOfError (TheErrorHeap : HeapOfErrors;
Error : ComponentError) return Natural;
function PositionOfError (TheErrorHeap : HeapOfErrors;
Error : ComponentError) return LexTokenManager.Token_Position;
function SymOfError (TheErrorHeap : HeapOfErrors;
Error : ComponentError) return Dictionary.Symbol;
function AssociatedComponentNodesOfError (TheErrorHeap : HeapOfErrors;
Error : ComponentError) return SeqAlgebra.Seq;
procedure ReportUsage (TheErrorHeap : in HeapOfErrors);
--# global in out Statistics.TableUsage;
--# derives Statistics.TableUsage from *,
--# TheErrorHeap;
private
type ErrorDescriptor is record
ErrClass : ErrorClass;
ErrVal : Natural;
Position : LexTokenManager.Token_Position;
Sym : Dictionary.Symbol;
AssociatedComponentNodes : SeqAlgebra.Seq;
NextError : ComponentError;
end record;
subtype ComponentIndex is Natural range 1 .. MaxNumComponentErrors;
type ArrayOfErrorDescriptors is array (ComponentIndex) of ErrorDescriptor;
type HeapOfErrors is record
ListOfComponentErrors : ArrayOfErrorDescriptors;
HighMark, NextFreeComponent : ComponentError;
end record;
end ComponentErrors;
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