SYMBOL Parse()
{
ParserEntry pe;
SYMBOL newtop;
Create();
ParseStackEntry top = new ParseStackEntry(this,0,NextSym());
try
{
for (;;)
{
string cnm = top.m_value.yyname;
if (m_debug)
{
if (cnm.Equals("TOKEN"))
Console.WriteLine(String.Format("State {0} with {1} \"{2}\"", top.m_state, cnm,((TOKEN)top.m_value).yytext));
else
Console.WriteLine(String.Format("State {0} with {1}", top.m_state, cnm));
}
if (top.m_value!=null && top.m_value.Pass(m_symbols,top.m_state, out pe))
pe.Pass(ref top);
else if (top.m_value==m_symbols.EOFSymbol)
{
if (top.m_state==m_symbols.m_accept.m_state)
{ // successful parse
Pop(ref top,1,m_symbols.m_startSymbol);
if (m_symbols.erh.counter>0)
return new recoveredError(this,top);
newtop = top.m_value; // extract the return value
top.m_value = null;
return newtop;
}
if (!Error(ref top,"Unexpected EOF")) // unrecovered error
return top.m_value;
}
else if (!Error(ref top,"syntax error")) // unrecovered error
return top.m_value;
if (m_debug)
{
object ob = null;
if (top.m_value!=null)
{
ob = top.m_value.m_dollar;
Console.WriteLine("In state {0} top {1} value {2}",top.m_state,top.m_value.yyname,(ob==null)?"null":ob.GetType().Name);
if (ob!=null && ob.GetType().Name.Equals("Int32"))
Console.WriteLine((int)ob);
else
((SYMBOL)(top.m_value)).Print();
}
else
Console.WriteLine("In state {0} top NULL",top.m_state);
}
}
// not reached
}
catch(CSToolsStopException ex) // stop parsing
{
if (m_symbols.erh.throwExceptions)
throw ex; // 4.5b
m_symbols.erh.Report(ex); // 4.5b
}
return null;
}
