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81 lines
2.2 KiB
ObjectPascal
81 lines
2.2 KiB
ObjectPascal
unit WarnDestroy;
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{ AFS 30 December 2002
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warn of calls to obj.destroy;
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}
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{(*}
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(*------------------------------------------------------------------------------
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Delphi Code formatter source code
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The Original Code is WarnDestroy, released May 2003.
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The Initial Developer of the Original Code is Anthony Steele.
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Portions created by Anthony Steele are Copyright (C) 1999-2008 Anthony Steele.
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All Rights Reserved.
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Contributor(s): Anthony Steele.
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The contents of this file are subject to the Mozilla Public License Version 1.1
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(the "License"). you may not use this file except in compliance with the License.
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You may obtain a copy of the License at http://www.mozilla.org/NPL/
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either express or implied.
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See the License for the specific language governing rights and limitations
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under the License.
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Alternatively, the contents of this file may be used under the terms of
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the GNU General Public License Version 2 or later (the "GPL")
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See http://www.gnu.org/licenses/gpl.html
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------------------------------------------------------------------------------*)
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{*)}
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{$I JcfGlobal.inc}
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interface
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uses Warning;
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type
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TWarnDestroy = class(TWarning)
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public
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function EnabledVisitSourceToken(const pcToken: TObject): Boolean; override;
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end;
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implementation
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uses
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{ delphi }
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{$IFNDEF FPC}Windows,{$ENDIF} SysUtils,
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{ local }
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SourceToken, ParseTreeNodeType, ParseTreeNode;
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function TWarnDestroy.EnabledVisitSourceToken(const pcToken: TObject): Boolean;
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var
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lcToken: TSourceToken;
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lcFunction: TParseTreeNode;
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begin
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Result := False;
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lcToken := TSourceToken(pcToken);
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{ look in statements }
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if not lcToken.HasParentNode(nBlock) then
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exit;
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if not AnsiSameText(lcToken.SourceCode, 'destroy') then
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exit;
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{ is OK in destructors as 'inherited destroy' }
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lcFunction := lcToken.GetParentNode(ProcedureNodes + [nInitSection]);
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if (lcFunction <> nil) and (lcFunction.NodeType = nDestructorDecl) then
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exit;
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SendWarning(lcToken, 'Destroy should not normally be called. ' +
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'You may want to use FreeAndNil(MyObj), or MyObj.Free, or MyForm.Release');
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end;
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end.
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