public bool Parse()
{
Initialize(); // allow derived classes to instantiate rules, states and nonTerminals
next = 0;
current_state = states[0];
state_stack.Push(current_state);
value_stack.Push(yyval);
location_stack.Push(yyloc);
while (true)
{
int action = current_state.defaultAction;
if (current_state.parser_table != null)
{
if (next == 0)
{
// We save the last token span, so that the location span
// of production right hand sides that begin or end with a
// nullable production will be correct.
lastL = scanner.yylloc;
next = scanner.yylex();
}
int vnext;
if (current_state.parser_table.TryGetValue(next, out vnext))
{
action = vnext;
}
}
if (action > 0) // shift
{
Shift(action);
}
else if (action < 0) // reduce
{
Reduce(-action);
if (action == -1) // accept
{
return(true);
}
}
else if (action == 0) // error
{
if (!ErrorRecovery())
{
return(false);
}
}
}
}
public bool Parse()
{
Initialize(); // allow derived classes to instantiate rules, states and nonTerminals
next = 0;
current_state = states[0];
state_stack.Push(current_state);
value_stack.Push(yyval);
location_stack.Push(yyloc);
while (true)
{
if (Trace)
{
Console.Error.WriteLine("Entering state {0} ", current_state.num);
}
int action = current_state.defaultAction;
if (current_state.parser_table != null)
{
if (next == 0)
{
if (Trace)
{
Console.Error.Write("Reading a token: ");
}
next = scanner.yylex();
}
if (Trace)
{
Console.Error.WriteLine("Next token is {0}", TerminalToString(next));
}
if (current_state.parser_table.ContainsKey(next))
{
action = current_state.parser_table[next];
}
}
if (action > 0) // shift
{
Shift(action);
}
else if (action < 0) // reduce
{
Reduce(-action);
if (action == -1) // accept
{
return(true);
}
}
else if (action == 0) // error
{
if (!ErrorRecovery())
{
return(false);
}
}
}
}
