private void CollectTermsRecursive(BnfTerm term)
{
// Do not add pseudo terminals defined as static singletons in Grammar class (Empty, Eof, etc)
// We will never see these terminals in the input stream.
// Filter them by type - their type is exactly "Terminal", not derived class.
if (term.GetType() == typeof(Terminal))
{
return;
}
if (_grammarData.AllTerms.Contains(term))
{
return;
}
_grammarData.AllTerms.Add(term);
NonTerminal nt = term as NonTerminal;
if (nt == null)
{
return;
}
if (nt.Name == null)
{
if (nt.Rule != null && !string.IsNullOrEmpty(nt.Rule.Name))
{
nt.Name = nt.Rule.Name;
}
else
{
nt.Name = "NT" + (_unnamedCount++);
}
}
if (nt.Rule == null)
{
_language.Errors.Add("Non-terminal " + nt.Name + " has uninitialized Rule property.");
return;
}
//check all child elements
foreach (BnfTermList elemList in nt.Rule.Data)
{
for (int i = 0; i < elemList.Count; i++)
{
BnfTerm child = elemList[i];
if (child == null)
{
_language.Errors.Add("Rule for NonTerminal " + nt.Name + " contains null as an operand in position " + i.ToString() + " in one of productions.");
continue; //for i loop
}
//Check for nested expression - convert to non-terminal
BnfExpression expr = child as BnfExpression;
if (expr != null)
{
child = new NonTerminal(null, expr);
elemList[i] = child;
}
CollectTermsRecursive(child);
} //for i
}
} //method
private void CollectTermsRecursive(BnfTerm term) {
// Do not add pseudo terminals defined as static singletons in Grammar class (Empty, Eof, etc)
// We will never see these terminals in the input stream.
// Filter them by type - their type is exactly "Terminal", not derived class.
if (term.GetType() == typeof(Terminal)) return;
if (_grammarData.AllTerms.Contains(term)) return;
_grammarData.AllTerms.Add(term);
NonTerminal nt = term as NonTerminal;
if (nt == null) return;
if (nt.Name == null) {
if (nt.Rule != null && !string.IsNullOrEmpty(nt.Rule.Name))
nt.Name = nt.Rule.Name;
else
nt.Name = "NT" + (_unnamedCount++);
}
if (nt.Rule == null) {
_language.Errors.Add("Non-terminal " + nt.Name + " has uninitialized Rule property.");
return;
}
//check all child elements
foreach (BnfTermList elemList in nt.Rule.Data)
for (int i = 0; i < elemList.Count; i++) {
BnfTerm child = elemList[i];
if (child == null) {
_language.Errors.Add("Rule for NonTerminal " + nt.Name + " contains null as an operand in position " + i.ToString() + " in one of productions.");
continue; //for i loop
}
//Check for nested expression - convert to non-terminal
BnfExpression expr = child as BnfExpression;
if (expr != null) {
child = new NonTerminal(null, expr);
elemList[i] = child;
}
CollectTermsRecursive(child);
}//for i
}//method
