63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Copyright (C) 1991-1992, Microsoft Corporation.
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//
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// File: CONVERT.HXX
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//
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// Contents: Expression to cursor converter
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//
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// Classes: CConverter
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//
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// History: 16-Jul-92 MikeHew Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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class CRestriction;
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class CNodeRestriction;
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class CCursor;
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class COccCursor;
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class CQueriable;
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//+---------------------------------------------------------------------------
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//
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// Class: CConverter
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//
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// Purpose: Convert expressions to cursors
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//
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// Interface:
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//
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// History: 15-Jul-92 MikeHew Created
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//
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//----------------------------------------------------------------------------
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class CConverter
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{
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public:
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CConverter( CQueriable* pQuerble, ULONG cMaxNodes );
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CCursor* QueryCursor ( CRestriction const * pRst );
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BOOL TooManyNodes() { return 0 == _cNodesRemaining; }
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private:
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// Converting expressions to cursors
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CCursor* ConvertRst ( CRestriction const * pRst );
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CCursor* ConvertNode ( CNodeRestriction const * pNodeRst );
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CCursor* ConvertProxNode ( CNodeRestriction const * pNodeRst );
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COccCursor* ConvertPhraseNode ( CNodeRestriction const * pNodeRst );
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CCursor* ConvertAndNotNode ( XCursor & curAnd, CCurStack & curNot );
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CCursor* ConvertVectorNode ( CNodeRestriction const * pNodeRst );
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COccCursor* ConvertLeaf ( CRestriction const * pRst );
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CQueriable * _pQuerble;
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ULONG _cNodesRemaining;
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};
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