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);
}