// 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;
*/
}
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);
}