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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef INCLUDED_BASIC_SOURCE_INC_EXPR_HXX
21 : #define INCLUDED_BASIC_SOURCE_INC_EXPR_HXX
22 :
23 : #include "opcodes.hxx"
24 : #include "token.hxx"
25 :
26 : class SbiExprNode;
27 : class SbiExpression;
28 : class SbiExprList;
29 : class SbiDimList;
30 : class SbiParameters;
31 : class SbiParser;
32 : class SbiCodeGen;
33 : class SbiSymDef;
34 : class SbiProcDef;
35 :
36 :
37 : #include <vector>
38 : typedef ::std::vector<SbiExprList*> SbiExprListVector;
39 :
40 : struct SbVar {
41 : SbiExprNode* pNext; // next element (for structures)
42 : SbiSymDef* pDef; // symbol definition
43 : SbiExprList* pPar; // optional parameters (is deleted)
44 : SbiExprListVector* pvMorePar; // Array of arrays foo(pPar)(avMorePar[0])(avMorePar[1])...
45 : };
46 :
47 0 : struct KeywordSymbolInfo
48 : {
49 : OUString m_aKeywordSymbol;
50 : SbxDataType m_eSbxDataType;
51 : SbiToken m_eTok;
52 : };
53 :
54 : enum SbiExprType { // expression types:
55 : SbSTDEXPR, // normal expression
56 : SbLVALUE, // any lValue
57 : SbSYMBOL, // any composite symbol
58 : SbOPERAND // variable/function
59 : };
60 :
61 : enum SbiExprMode { // Expression context:
62 : EXPRMODE_STANDARD, // default
63 : EXPRMODE_STANDALONE, // a param1, param2 OR a( param1, param2 ) = 42
64 : EXPRMODE_LPAREN_PENDING, // start of parameter list with bracket, special handling
65 : EXPRMODE_LPAREN_NOT_NEEDED, // pending LPAREN has not been used
66 : EXPRMODE_ARRAY_OR_OBJECT, // '=' or '(' or '.' found after ')' on ParenLevel 0, stopping
67 : // expression, assuming array syntax a(...)[(...)] = ?
68 : // or a(...).b(...)
69 : EXPRMODE_EMPTY_PAREN // It turned out that the paren don't contain anything: a()
70 : };
71 :
72 : enum SbiNodeType {
73 : SbxNUMVAL, // nVal = value
74 : SbxSTRVAL, // aStrVal = value, before #i59791/#i45570: nStringId = value
75 : SbxVARVAL, // aVar = value
76 : SbxTYPEOF, // TypeOf ObjExpr Is Type
77 : SbxNODE, // Node
78 : SbxNEW, // new <type> expression
79 : SbxDUMMY
80 : };
81 :
82 : enum RecursiveMode
83 : {
84 : UNDEFINED,
85 : FORCE_CALL,
86 : PREVENT_CALL
87 : };
88 :
89 : class SbiExprNode { // operators (and operands)
90 : friend class SbiExpression;
91 : friend class SbiConstExpression;
92 : union {
93 : sal_uInt16 nTypeStrId; // pooled String-ID, #i59791/#i45570 Now only for TypeOf
94 : double nVal; // numeric value
95 : SbVar aVar; // or variable
96 : };
97 : OUString aStrVal; // #i59791/#i45570 Store string directly
98 : SbiExprNode* pLeft; // right branch
99 : SbiExprNode* pRight; // right branch (NULL for unary ops)
100 : SbiExprNode* pWithParent; // node, whose member is "this per with"
101 : SbiCodeGen* pGen; // code-generator
102 : SbiNodeType eNodeType;
103 : SbxDataType eType;
104 : SbiToken eTok;
105 : bool bError; // true: error
106 : void FoldConstants();
107 : void CollectBits(); // converting numbers to strings
108 0 : bool IsOperand()
109 0 : { return eNodeType != SbxNODE && eNodeType != SbxTYPEOF && eNodeType != SbxNEW; }
110 0 : bool IsTypeOf()
111 0 : { return eNodeType == SbxTYPEOF; }
112 0 : bool IsNew()
113 0 : { return eNodeType == SbxNEW; }
114 : bool IsNumber();
115 : bool IsLvalue(); // true, if usable as Lvalue
116 : void GenElement( SbiOpcode );
117 : void BaseInit( SbiParser* p ); // help function for Ctor, from 17.12.95
118 : public:
119 : SbiExprNode( void );
120 : SbiExprNode( SbiParser*, double, SbxDataType );
121 : SbiExprNode( SbiParser*, const OUString& );
122 : SbiExprNode( SbiParser*, const SbiSymDef&, SbxDataType, SbiExprList* = NULL );
123 : SbiExprNode( SbiParser*, SbiExprNode*, SbiToken, SbiExprNode* );
124 : SbiExprNode( SbiParser*, SbiExprNode*, sal_uInt16 ); // #120061 TypeOf
125 : SbiExprNode( SbiParser*, sal_uInt16 ); // new <type>
126 : virtual ~SbiExprNode();
127 :
128 0 : bool IsValid() { return !bError; }
129 0 : bool IsConstant() // true: constant operand
130 0 : { return eNodeType == SbxSTRVAL || eNodeType == SbxNUMVAL; }
131 : bool IsIntConst();
132 : bool IsVariable();
133 :
134 0 : SbiExprNode* GetWithParent() { return pWithParent; }
135 0 : void SetWithParent( SbiExprNode* p ) { pWithParent = p; }
136 :
137 0 : SbxDataType GetType() { return eType; }
138 0 : void SetType( SbxDataType eTp ) { eType = eTp; }
139 0 : SbiNodeType GetNodeType() { return eNodeType; }
140 : SbiSymDef* GetVar();
141 : SbiSymDef* GetRealVar(); // last variable in x.y.z
142 : SbiExprNode* GetRealNode(); // last node in x.y.z
143 : short GetDepth(); // compute a tree's depth
144 0 : const OUString& GetString() { return aStrVal; }
145 0 : short GetNumber() { return (short)nVal; }
146 0 : SbiExprList* GetParameters() { return aVar.pPar; }
147 : SbiExprListVector* GetMoreParameters() { return aVar.pvMorePar; }
148 :
149 : void Optimize(); // tree matching
150 :
151 : void Gen( RecursiveMode eRecMode = UNDEFINED ); // giving out a node
152 : };
153 :
154 : class SbiExpression {
155 : friend class SbiExprList;
156 : friend class SbiParameters;
157 : friend class SbiDimList;
158 : protected:
159 : OUString aArgName;
160 : SbiParser* pParser;
161 : SbiExpression* pNext; // link at parameter lists
162 : SbiExprNode* pExpr; // expression tree
163 : SbiExprType eCurExpr; // type of expression
164 : SbiExprMode m_eMode; // expression context
165 : bool bBased; // true: easy DIM-part (+BASE)
166 : bool bError;
167 : bool bByVal; // true: ByVal-Parameter
168 : bool bBracket; // true: Parameter list with brackets
169 : sal_uInt16 nParenLevel;
170 : SbiExprNode* Term( const KeywordSymbolInfo* pKeywordSymbolInfo = NULL );
171 : SbiExprNode* ObjTerm( SbiSymDef& );
172 : SbiExprNode* Operand( bool bUsedForTypeOf = false );
173 : SbiExprNode* Unary();
174 : SbiExprNode* Exp();
175 : SbiExprNode* MulDiv();
176 : SbiExprNode* IntDiv();
177 : SbiExprNode* Mod();
178 : SbiExprNode* AddSub();
179 : SbiExprNode* Cat();
180 : SbiExprNode* Like();
181 : SbiExprNode* VBA_Not();
182 : SbiExprNode* Comp();
183 : SbiExprNode* Boolean();
184 : public:
185 : SbiExpression( SbiParser*, SbiExprType = SbSTDEXPR,
186 : SbiExprMode eMode = EXPRMODE_STANDARD, const KeywordSymbolInfo* pKeywordSymbolInfo = NULL ); // parsing Ctor
187 : SbiExpression( SbiParser*, double, SbxDataType = SbxDOUBLE );
188 : SbiExpression( SbiParser*, const SbiSymDef&, SbiExprList* = NULL );
189 : ~SbiExpression();
190 0 : OUString& GetName() { return aArgName; }
191 0 : void SetBased() { bBased = true; }
192 0 : bool IsBased() { return bBased; }
193 0 : void SetByVal() { bByVal = true; }
194 : bool IsByVal() { return bByVal; }
195 0 : bool IsBracket() { return bBracket; }
196 0 : bool IsValid() { return pExpr->IsValid(); }
197 : bool IsConstant() { return pExpr->IsConstant(); }
198 0 : bool IsVariable() { return pExpr->IsVariable(); }
199 0 : bool IsLvalue() { return pExpr->IsLvalue(); }
200 0 : bool IsIntConstant() { return pExpr->IsIntConst(); }
201 0 : const OUString& GetString() { return pExpr->GetString(); }
202 : SbiSymDef* GetVar() { return pExpr->GetVar(); }
203 0 : SbiSymDef* GetRealVar() { return pExpr->GetRealVar(); }
204 0 : SbiExprNode* GetExprNode() { return pExpr; }
205 0 : SbxDataType GetType() { return pExpr->GetType(); }
206 : void SetType( SbxDataType eType){ pExpr->eType = eType; }
207 : void Gen( RecursiveMode eRecMode = UNDEFINED );
208 : };
209 :
210 0 : class SbiConstExpression : public SbiExpression {
211 : double nVal;
212 : OUString aVal;
213 : SbxDataType eType;
214 : public: // numeric constant
215 : SbiConstExpression( SbiParser* );
216 0 : SbxDataType GetType() { return eType; }
217 0 : const OUString& GetString() { return aVal; }
218 0 : double GetValue() { return nVal; }
219 : short GetShortValue();
220 : };
221 :
222 : class SbiExprList { // base class for parameters and dims
223 : protected:
224 : SbiParser* pParser;
225 : SbiExpression* pFirst;
226 : short nExpr;
227 : short nDim;
228 : bool bError;
229 : bool bBracket;
230 : public:
231 : SbiExprList( SbiParser* );
232 : virtual ~SbiExprList();
233 0 : bool IsBracket() { return bBracket; }
234 0 : bool IsValid() { return !bError; }
235 0 : short GetSize() { return nExpr; }
236 0 : short GetDims() { return nDim; }
237 : SbiExpression* Get( short );
238 : void Gen(); // code generation
239 : void addExpression( SbiExpression* pExpr );
240 : };
241 :
242 0 : class SbiParameters : public SbiExprList {
243 : public:
244 : SbiParameters( SbiParser*, bool bStandaloneExpression = false, bool bPar = true);// parsing Ctor
245 : };
246 :
247 0 : class SbiDimList : public SbiExprList {
248 : bool bConst; // true: everything integer constants
249 : public:
250 : SbiDimList( SbiParser* ); // parsing Ctor
251 : bool IsConstant() { return bConst; }
252 : };
253 :
254 : #endif
255 :
256 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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