Exemplo n.º 1
0
        //	Create as much of the parse tree as possible.
        public override int CreateParseSubTree(ref CLexicalAnalyzer plexAnal, ref CSymbolTable pSymbolTable)
        {
            CToken pToken = null;
            //try
            {
                CExpParser expParser;
                //Munch a <Var>
                if ((CLexicalAnalyzer.LEX_FAIL == plexAnal.GetNextToken(ref pToken, ref pSymbolTable)) || pToken == null)
                {
                    //throw (C_UM_ERROR_INTERNALERR);
                }
                if (pToken.IsArrayVar())
                {
                    plexAnal.UnGetToken();
                    expParser        = new CExpParser();
                    m_pArrayExp      = expParser.ParseExpression(ref plexAnal, ref pSymbolTable, STMT_EXPR_TYPE.EXPR_LVALUE);
                    m_bLvalueIsArray = true;
                    m_pVariable      = null;
                    m_pOMExp         = null;
                    m_pComplexDDExp  = null;//Added By Anil August 23 2005
                }
                //Added By Anil August 4 2005 --starts here
                //For Handlin the DD variable and Expressions
                else if (pToken.IsDDItem())
                {
                    plexAnal.UnGetToken();
                    expParser            = new CExpParser();
                    m_pComplexDDExp      = expParser.ParseExpression(ref plexAnal, ref pSymbolTable, STMT_EXPR_TYPE.EXPR_LVALUE);
                    m_bLvalueIsComplexDD = true;
                    m_pArrayExp          = null;
                    m_pVariable          = null;
                    m_pOMExp             = null;
                }
                //Added By Anil August 4 2005 --Ends here
                else if (pToken.IsVariable())
                {
                    m_pVariable     = pToken;
                    m_pArrayExp     = null;
                    m_pOMExp        = null;
                    m_pComplexDDExp = null;//Anil August 23 2005

                    //DELETE_PTR(pToken);
                    //todo walter
                }
                else if (pToken.IsOMToken())
                {
                    //do something...
                    plexAnal.UnGetToken();
                    m_pOMExp = new COMServiceExpression();
                    m_pOMExp.CreateParseSubTree(ref plexAnal, ref pSymbolTable);
                    m_pVariable     = null;
                    m_pArrayExp     = null;
                    m_pComplexDDExp = null;//Anil August 23 2005
                }
                else
                {
                    //throw (C_AP_ERROR_LVALUE);
                }

                //DELETE_PTR(pToken);  //todo walter
                pToken = null;
                //Munch a <=> or <*=>
                if ((CLexicalAnalyzer.LEX_FAIL == plexAnal.GetNextToken(ref pToken, ref pSymbolTable)) ||
                    pToken == null ||
                    !pToken.IsAssignOp())
                {
                    //throw (C_AP_ERROR_MISSINGEQ);
                }
                m_AssignType = pToken.GetSubType();

                //Munch & Parse the expression.
                //we got to give the expression string to the expression parser.
                expParser = new CExpParser();
                //try
                {
                    m_pExpression = expParser.ParseExpression(ref plexAnal, ref pSymbolTable, STMT_EXPR_TYPE.EXPR_ASSIGN);

                    if (m_pExpression == null)
                    {
                        //throw (C_AP_ERROR_MISSINGEXP);
                    }
                }

                /*
                 *              catch (CRIDEError* perr)
                 *              {
                 *                      pvecErrors.push_back(perr);
                 *                      plexAnal.SynchronizeTo(EXPRESSION, pSymbolTable);
                 *              }
                 */
                if ((CLexicalAnalyzer.LEX_FAIL == plexAnal.GetNextToken(ref pToken, ref pSymbolTable)) ||
                    pToken == null || (RUL_TOKEN_SUBTYPE.RUL_SEMICOLON != pToken.GetSubType()))
                {
                    //throw (C_AP_ERROR_MISSINGSC);
                }
                return(1);
            }

            /*
             *          catch (CRIDEError* perr)
             *          {
             *                  pvecErrors.push_back(perr);
             *                  plexAnal.SynchronizeTo(EXPRESSION, pSymbolTable);
             *          }
             *          catch (...)
             *          {
             *                  throw (C_UM_ERROR_UNKNOWNERROR);
             *          }
             *          return PARSE_FAIL;
             */
        }
Exemplo n.º 2
0
        public CGrammarNode CreateParser(ref CLexicalAnalyzer plexAnal, STATEMENT_TYPE stmt_type)
        {
            CGrammarNode pNode  = null;
            CToken       pToken = null;

            if ((CLexicalAnalyzer.LEX_FAIL != (plexAnal.LookAheadToken(ref pToken))) && pToken != null)
            {
                if (((stmt_type == STATEMENT_TYPE.STMT_DECL) || (stmt_type == STATEMENT_TYPE.STMT_asic)) &&
                    ((pToken.GetType() == RUL_TOKEN_TYPE.RUL_SYMBOL) && (pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_SEMICOLON)))
                {
                    pNode = new CEmptyStatement();
                }
                else if (
                    ((stmt_type == STATEMENT_TYPE.STMT_DECL) || (stmt_type == STATEMENT_TYPE.STMT_asic)) &&
                    ((pToken.GetType() == RUL_TOKEN_TYPE.RUL_SYMBOL) && (pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_LPAREN))
                    )
                {
                    pNode = new CExpression();
                }
                else if (((stmt_type == STATEMENT_TYPE.STMT_DECL) || (stmt_type == STATEMENT_TYPE.STMT_asic)) && pToken.IsDeclaration())          //Declaration Statement
                {
                    pNode = new CDeclaration();
                }
                else if (((stmt_type == STATEMENT_TYPE.STMT_asic)) &&
                         (RUL_TOKEN_TYPE.RUL_KEYWORD == pToken.GetType()) &&
                         !pToken.IsIteration() &&
                         !pToken.IsFunctionToken())
                {
                    if (pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_IF)// IF Selection Statement
                    {
                        pNode = new CSelectionStatement();
                    }
                    else if (pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_SWITCH)//SWITCH Statement
                    {
                        pNode = new CSwitchStatement();
                    }
                    else if (RUL_TOKEN_TYPE.RUL_KEYWORD == pToken.GetType() &&
                             RUL_TOKEN_SUBTYPE.RUL_RULE_ENGINE == pToken.GetSubType())   //Rule Statement
                    {
                        pNode = new CRuleServiceStatement();
                    }
                    else if (RUL_TOKEN_TYPE.RUL_KEYWORD == pToken.GetType() &&
                             RUL_TOKEN_SUBTYPE.RUL_BREAK == pToken.GetSubType())     //break Statement
                    {
                        pNode = new CBreakStatement();
                    }
                    else if (RUL_TOKEN_TYPE.RUL_KEYWORD == pToken.GetType() &&
                             RUL_TOKEN_SUBTYPE.RUL_CONTINUE == pToken.GetSubType())      //continue Statement
                    {
                        pNode = new CContinueStatement();
                    }
                    else if (RUL_TOKEN_TYPE.RUL_KEYWORD == pToken.GetType() &&
                             RUL_TOKEN_SUBTYPE.RUL_RETURN == pToken.GetSubType())    //continue Statement
                    {
                        pNode = new CReturnStatement();
                    }
                }
                else if (((stmt_type == STATEMENT_TYPE.STMT_ITERATION) || (stmt_type == STATEMENT_TYPE.STMT_asic)) && pToken.IsIteration())                               //Iteration Statement
                {
                    if (pToken.IsWHILEStatement())
                    {
                        pNode = new CIterationStatement();
                    }
                    else if (pToken.IsDOStatement())
                    {
                        pNode = new CIterationDoWhileStatement();
                    }
                    else if (pToken.IsFORStatement())
                    {
                        pNode = new CIterationForStatement();
                    }
                }
                else if (((stmt_type == STATEMENT_TYPE.STMT_ASSIGNMENT) || (stmt_type == STATEMENT_TYPE.STMT_asic)) && (pToken.IsFunctionToken()))
                //Assignment Statement
                {
                    pNode = new CExpression();
                }
                else if (((stmt_type == STATEMENT_TYPE.STMT_ASSIGNMENT) || (stmt_type == STATEMENT_TYPE.STMT_asic)) &&
                         (pToken.IsVariable() || pToken.IsArrayVar() || pToken.IsDDItem() ||//Added By Anil August 4 2005
                          pToken.IsOMToken() || pToken.IsNumeric() ||
                          pToken.IsConstant() || pToken.IsFunctionToken() || pToken.IsOperator() ||
                          ((pToken.GetType() == RUL_TOKEN_TYPE.RUL_SYMBOL) && (pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_LPAREN))
                         ))
                //Assignment Statement
                {
                    CToken pNewToken = null;  //TSRPRASAD 09MAR2004 Fix the memory leaks	*/

                    bool bLineIsAssignment = false;
                    if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ARITHMETIC_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_PLUS_ASSIGN, ref pNewToken))   //TSRPRASAD 09MAR2004 Fix the memory leaks	*/
                    {
                        bLineIsAssignment = true;
                    }
                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_MINUS_ASSIGN, ref pNewToken))   //TSRPRASAD 09MAR2004 Fix the memory leaks	*/
                    {
                        bLineIsAssignment = true;
                    }
                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_DIV_ASSIGN, ref pNewToken))     //TSRPRASAD 09MAR2004 Fix the memory leaks	*/
                    {
                        bLineIsAssignment = true;
                    }
                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_MOD_ASSIGN, ref pNewToken))   //TSRPRASAD 09MAR2004 Fix the memory leaks	*/
                    {
                        bLineIsAssignment = true;
                    }

                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_MUL_ASSIGN, ref pNewToken))    //TSRPRASAD 09MAR2004 Fix the memory leaks	*/
                    {
                        bLineIsAssignment = true;
                    }
                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_BIT_AND_ASSIGN, ref pNewToken)) //TSRPRASAD 09MAR2004 Fix the memory leaks	*/
                    {
                        bLineIsAssignment = true;
                    }
                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_BIT_OR_ASSIGN, ref pNewToken))  //TSRPRASAD 09MAR2004 Fix the memory leaks	*/
                    {
                        bLineIsAssignment = true;
                    }
                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_BIT_XOR_ASSIGN, ref pNewToken)) //TSRPRASAD 09MAR2004 Fix the memory leaks	*/
                    {
                        bLineIsAssignment = true;
                    }
                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_BIT_RSHIFT_ASSIGN, ref pNewToken))  //TSRPRASAD 09MAR2004 Fix the memory leaks	*/
                    {
                        bLineIsAssignment = true;
                    }
                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_BIT_LSHIFT_ASSIGN, ref pNewToken)) //TSRPRASAD 09MAR2004 Fix the memory leaks	*/

                    {
                        bLineIsAssignment = true;
                    }
                    else if (plexAnal.ScanLineForToken(RUL_TOKEN_TYPE.RUL_ASSIGNMENT_OPERATOR, RUL_TOKEN_SUBTYPE.RUL_ASSIGN, ref pNewToken)) //TSRPRASAD 09MAR2004 Fix the memory leaks	*/

                    {
                        bLineIsAssignment = true;
                    }

                    if (bLineIsAssignment)
                    {
                        pNode = new CAssignmentStatement();
                    }
                    else
                    {
                        pNode = new CExpression();
                    }
                }
                else if (((stmt_type == STATEMENT_TYPE.STMT_ASSIGNMENT) || (stmt_type == STATEMENT_TYPE.STMT_asic)) && pToken.IsFunctionToken())                           //Assignment Statement
                {
                    pNode = new CAssignmentStatement();
                }
                else if (((stmt_type == STATEMENT_TYPE.STMT_COMPOUND) || (stmt_type == STATEMENT_TYPE.STMT_asic)) && pToken.IsCompound())                                //Compound Statement
                {
                    pNode = new CCompoundStatement();
                }
                else if (((stmt_type == STATEMENT_TYPE.STMT_SERVICE) || (stmt_type == STATEMENT_TYPE.STMT_asic) || (stmt_type == STATEMENT_TYPE.STMT_ASSIGNMENT_FOR)) &&
                         pToken.IsService())                               //Service Statement
                {
                    pNode = new CServiceStatement();
                }
                else if (((stmt_type == STATEMENT_TYPE.STMT_SELECTION)) && (RUL_TOKEN_TYPE.RUL_KEYWORD == pToken.GetType()))
                {
                    if ((pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_CASE) || (pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_DEFAULT))//CASE or DEFAULT Statement
                    {
                        pNode = new CCASEStatement();
                    }
                    else if (pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_ELSE)//ELSE Statement
                    {
                        pNode = new CELSEStatement();
                    }
                }
                else
                {
                    //error
                    //the natural control flow is allowed to take care of this
                    //erroneous condition.
                }
            }
            return(pNode);
        }