public Object PreAcceptThen(CIf cif, Object objstate)
{
int newtype = 0;
CExpression exp = cif.Condition;
bool not = exp is CNot;
if (not)
{
exp = ((CNot)exp).Operand;
if (exp is CParenExpression)
exp = ((CParenExpression)exp).InnerExpression;
}
if (exp is CLogic && ((CLogic)exp).Operation.Value == "or")
{
CExpression lhs = ((CLogic)exp).Left;
if (lhs is CAccess && ((CAccess)lhs).IsRootAccess &&
((CAccess)lhs).ReferenceToken.Value == "g_fmssql")
newtype |= DbMsSql;
exp = ((CLogic)exp).Right;
}
if (exp is CAccess)
{
CAccess acc = (CAccess)exp;
if (acc.IsRootAccess)
{
if (acc.ReferenceToken.Value == "g_fmssql")
newtype |= DbMsSql;
if (acc.ReferenceToken.Value == "g_fmysql")
newtype |= DbMySql;
}
}
if (newtype == 0)
return null;
if (not)
newtype = ~newtype;
DbTypeInfo state;
if (objstate == null)
{
state = new DbTypeInfo();
state.oldtype = dbtype;
}
else
state = (DbTypeInfo)objstate;
state.currenttype = newtype;
state.elsetype &= ~newtype;
dbtype = newtype;
return state;
}
public void VisitIf(CIf cif)
{
if (!cif.IsElseIf)
InstrumentNode(cif);
visitor.VisitIf(cif);
}
public void PreAcceptEndIf(CIf cif, Object objstate)
{
if (objstate == null)
return;
DbTypeInfo state = (DbTypeInfo)objstate;
dbtype = state.oldtype;
}