/// <summary>
/// Returns the next token after the Token passed here
/// </summary>
/// <param name="peekToken">The PeekToken token returned from a previous Peek() call</param>
/// <seealso cref="Peek()" />
public virtual PeekToken Peek(PeekToken peekToken)
{
int oldIndex = _index;
_index = peekToken.TokenIndex;
if (_index >= _inputString.Length)
{
_index = oldIndex;
return(null);
}
foreach (KeyValuePair <Tokens, string> pair in _tokens)
{
Regex r = new Regex(pair.Value);
Match m = r.Match(_inputString, _index);
if (m.Success && m.Index == _index)
{
_index += m.Length;
PeekToken pt = new PeekToken(_index, new Token(pair.Key, m.Value));
_index = oldIndex;
return(pt);
}
}
PeekToken pt2 = new PeekToken(_index + 1, new Token(Tokens.Undefined, (_inputString[_index]).ToString()));
_index = oldIndex;
return(pt2);
}
public PascalParser(PeekToken peekToken, NextToken nextToken, PeekAndNext peekAndNext, NextAndPeek nextAndPeek)
{
PeekToken = peekToken;
NextToken = nextToken;
PeekAndNext = peekAndNext;
NextAndPeek = nextAndPeek;
}
public PeekToken Peek(PeekToken peekToken)
{
int oldIndex = _index;
_index = peekToken.TokenIndex;
if (_index >= _inputString.Length)
{
_index = oldIndex;
return null;
}
foreach (KeyValuePair<Tokens, string> pair in _tokens)
{
var r = new Regex(pair.Value);
Match m = r.Match(_inputString, _index);
if (m.Success && m.Index == _index)
{
_index += m.Length;
var pt = new PeekToken(_index, new Token(pair.Key, m.Value));
_index = oldIndex;
return pt;
}
}
var pt2 = new PeekToken(_index + 1, new Token(Tokens.UNDEFINED, string.Empty));
_index = oldIndex;
return pt2;
}
public PeekToken Peek(PeekToken peekToken)
{
var index = _index;
_index = peekToken.TokenIndex;
PeekToken result;
if (_index >= _inputString.Length)
{
_index = index;
result = null;
}
else
{
foreach (var current in _tokens)
{
var regex = new Regex(current.Value);
var match = regex.Match(_inputString, _index);
if (match.Success && match.Index == _index)
{
_index += match.Length;
var peekToken2 = new PeekToken(_index, new Token(current.Key, match.Value));
_index = index;
result = peekToken2;
return result;
}
}
var peekToken3 = new PeekToken(_index + 1, new Token(Tokens.UNDEFINED, string.Empty));
_index = index;
result = peekToken3;
}
return result;
}