public override void ProcessState(IStateContext context)
{
IParseString ps = context.GetParseString();
if (context.GetRoot() != null)
{
if (context.GetCurrentConj() != null)
{
context.SetRoot(new Tree.OrNode((Tree.Node)context.GetRoot(), (Tree.Node)context.GetCurrentConj()));
}
}
else
{
context.SetRoot(context.GetCurrentConj());
}
context.SetCurrentConj(null);
if (ps.HasChar())
{
ChangeState(new InitState(GetParent()));
}
}
public INode Parse(string a)
{
IParserState state;
_context = new StateContext(new ParseString(a.ToUpper()), null);
ChangeState(new InitState(this));
while (_states.Count > 0)
{
state = _states.Pop();
state.ProcessState(_context);
}
return(_context.GetRoot());
}
public override void ProcessState(IStateContext context)
{
IParseString ps = context.GetParseString();
if (!ps.HasChar())
{
if (context.GetCurrentConj() != null)
{
ChangeState(new AddConjunctionState(GetParent()));
return;
}
else if (context.GetRoot() == null)
{
GetParent().SetError("Unexpected } of line at position" + ps.GetPosition().ToString());
ChangeState(new ErrorState(GetParent()));
}
return;
}
switch (ps.GetChar())
{
case 'X':
ChangeState(new StartTermState(GetParent()));
break;
case '+':
if (context.GetCurrentConj() != null)
{
ChangeState(new AddConjunctionState(GetParent()));
return;
}
else
{
GetParent().SetError("Unexpected char position " + ps.GetPosition().ToString());
ChangeState(new ErrorState(GetParent()));
}
break;
case '(':
ChangeState(new StartExprState(GetParent()));
break;
case ')':
ChangeState(new EndExprState(GetParent()));
break;
default:
GetParent().SetError("Unexpected char at position " + (ps.GetPosition() - 1).ToString());
ChangeState(new ErrorState(GetParent()));
break;
}
}
public override void ProcessState(IStateContext context)
{
IParseString ps = context.GetParseString();
IStateContext oldcontext = context.GetPrevousContext();
if (oldcontext == null)
{
GetParent().SetError("Unexpected closing parenthesis at pos " + (ps.GetPosition() - 1).ToString());
ChangeState(new ErrorState(GetParent()));
return;
}
if (context.GetRoot() == null)
{
if (context.GetCurrentConj() != null)
{
context.SetRoot(context.GetCurrentConj()); // êîíåö êîíúþíêöèè
}
else
{
GetParent()
.SetError("Empty expression between parenthesis at pos " + ((ps.GetPosition() - 1).ToString()));
ChangeState(new ErrorState(GetParent()));
return;
}
}
else
{
if (context.GetCurrentConj() != null)
{
context.SetRoot(
new Tree.OrNode((Tree.Node)context.GetRoot(), (Tree.Node)context.GetCurrentConj()));
}
}
context.SetCurrentConj(null);
if (ps.HasChar() && ps.PeekChar() == '"')
{
ps.GetChar();
if (context.GetRoot() != null)
{
context.SetRoot(new Tree.NotNode((Tree.Node)context.GetRoot()));
}
}
if (oldcontext.GetCurrentConj() != null)
{
oldcontext.SetCurrentConj(new Tree.AndNode((Tree.Node)oldcontext.GetCurrentConj(),
(Tree.Node)context.GetRoot()));
}
else
{
oldcontext.SetCurrentConj(context.GetRoot());
}
GetParent().ChangeContext(oldcontext);
if (!ps.HasChar() && oldcontext.GetPrevousContext() != null)
{
GetParent().SetError("Not found close bracket at pos " + ((ps.GetPosition() - 1).ToString()));
ChangeState(new ErrorState(GetParent()));
}
else
{
ChangeState(new InitState(GetParent()));
}
}
