// Create as much of the parse tree as possible.
public override int CreateParseSubTree(ref CLexicalAnalyzer plexAnal, ref CSymbolTable pSymbolTable)
{
CToken pToken = null;
//try
{
//Munch a <FOR>
if ((CLexicalAnalyzer.LEX_FAIL == plexAnal.GetNextToken(ref pToken, ref pSymbolTable)) ||
pToken == null || !pToken.IsFORStatement())
{
//throw (C_UM_ERROR_INTERNALERR);
}
//Munch a <(>
if ((CLexicalAnalyzer.LEX_FAIL == plexAnal.GetNextToken(ref pToken, ref pSymbolTable)) ||
pToken == null || !(pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_LPAREN))
{
//ADD_ERROR(C_WHILE_ERROR_MISSINGLP);
plexAnal.UnGetToken();
}
//Munch a Initialization Statement...
CParserBuilder builder = new CParserBuilder();
m_pInitializationStatement = (CAssignmentStatement)builder.CreateParser(ref plexAnal, STATEMENT_TYPE.STMT_asic);
if (null != (m_pInitializationStatement))
{
m_pInitializationStatement.CreateParseSubTree(ref plexAnal, ref pSymbolTable);
}
else
{
//Munch a <;>
if ((CLexicalAnalyzer.LEX_FAIL == plexAnal.GetNextToken(ref pToken, ref pSymbolTable)) ||
pToken == null || !(pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_SEMICOLON))
{
//ADD_ERROR(C_WHILE_ERROR_MISSINGLP);
plexAnal.UnGetToken();
}
}
//Munch & Parse the expression.
//we got to give the expression string to the expression parser.
//
CParserBuilder builder2 = new CParserBuilder();
CExpParser expParser = new CExpParser();
CGrammarNode pNode;
pNode = builder2.CreateParser(ref plexAnal, STATEMENT_TYPE.STMT_asic);
m_pExpression = null;
m_pExpressionStatement = null;
if (null != pNode)
{
expressionNodeType = pNode.GetNodeType();
if (expressionNodeType == GRAMMAR_NODE_TYPE.NODE_TYPE_ASSIGN)
{
expressionNodeType = GRAMMAR_NODE_TYPE.NODE_TYPE_ASSIGN;
m_pExpressionStatement = (CAssignmentStatement)pNode;
m_pExpressionStatement.CreateParseSubTree(ref plexAnal, ref pSymbolTable, STATEMENT_TYPE.STMT_asic);
}
else if (expressionNodeType == GRAMMAR_NODE_TYPE.NODE_TYPE_EXPRESSION)
{
expressionNodeType = GRAMMAR_NODE_TYPE.NODE_TYPE_EXPRESSION;
m_pExpression
= expParser.ParseExpression(ref plexAnal, ref pSymbolTable, STMT_EXPR_TYPE.EXPR_FOR);
if (m_pExpression == null)
{
//ADD_ERROR(C_WHILE_ERROR_MISSINGEXP);
}
}
else if (expressionNodeType == GRAMMAR_NODE_TYPE.NODE_TYPE_INVALID)
{
pToken = null;
//try
{
if ((CLexicalAnalyzer.LEX_FAIL != (plexAnal.LookAheadToken(ref pToken))) && pToken != null)
{
if ((pToken.GetType() == RUL_TOKEN_TYPE.RUL_SYMBOL) && (pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_SEMICOLON))
{
// This code is to handle for(;;) for Yokagawa EJX
expressionNodeType = GRAMMAR_NODE_TYPE.NODE_TYPE_EXPRESSION;
CToken pToken2 = new CToken("1");
pToken2.SetType(RUL_TOKEN_TYPE.RUL_NUMERIC_CONSTANT);
m_pExpression = new CPrimaryExpression(pToken2);
}
}
}
/*
* catch (...)
* {
* }
*/
}
}
else
{
//ADD_ERROR(C_WHILE_ERROR_MISSINGSTMT);
}
//Munch a <;>
if ((CLexicalAnalyzer.LEX_FAIL == plexAnal.GetNextToken(ref pToken, ref pSymbolTable)) ||
pToken == null || !(pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_SEMICOLON))
{
//ADD_ERROR(C_WHILE_ERROR_MISSINGLP);
plexAnal.UnGetToken();
}
//Munch a Increment Statement...
pNode = builder2.CreateParser(ref plexAnal, STATEMENT_TYPE.STMT_asic);
m_pIncrementExpression = null;
m_pIncrementStatement = null;
if (null != pNode)
{
incrementNodeType = pNode.GetNodeType();
if (incrementNodeType == GRAMMAR_NODE_TYPE.NODE_TYPE_ASSIGN)
{
incrementNodeType = GRAMMAR_NODE_TYPE.NODE_TYPE_ASSIGN;
m_pIncrementStatement = (CAssignmentStatement)pNode;
m_pIncrementStatement.CreateParseSubTree(ref plexAnal, ref pSymbolTable, STATEMENT_TYPE.STMT_ASSIGNMENT_FOR);
}
else if (incrementNodeType == GRAMMAR_NODE_TYPE.NODE_TYPE_EXPRESSION)
{
incrementNodeType = GRAMMAR_NODE_TYPE.NODE_TYPE_EXPRESSION;
m_pIncrementExpression
= expParser.ParseExpression(ref plexAnal, ref pSymbolTable, STMT_EXPR_TYPE.EXPR_FOR);
if (m_pIncrementExpression == null)
{
//ADD_ERROR(C_WHILE_ERROR_MISSINGEXP);
}
}
}
else
{
//ADD_ERROR(C_WHILE_ERROR_MISSINGSTMT);
}
//Munch a <)>
if ((CLexicalAnalyzer.LEX_FAIL == plexAnal.GetNextToken(ref pToken, ref pSymbolTable)) ||
pToken == null || !(pToken.GetSubType() == RUL_TOKEN_SUBTYPE.RUL_RPAREN))
{
//ADD_ERROR(C_WHILE_ERROR_MISSINGLP);
plexAnal.UnGetToken();
}
//Munch the statement
CParserBuilder builder3 = new CParserBuilder();
m_pStatement = (CStatement)builder.CreateParser(ref plexAnal, STATEMENT_TYPE.STMT_asic);
if (null != (m_pStatement))
{
m_pStatement.CreateParseSubTree(ref plexAnal, ref pSymbolTable);
}
else
{
//ADD_ERROR(C_WHILE_ERROR_MISSINGSTMT);
}
return(1);
}
/*
* catch (CRIDEError* perr)
* {
* pvecErrors.push_back(perr);
* plexAnal.MovePast(
* RUL_SYMBOL,
* RUL_SEMICOLON,
* 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);
}