/// <summary>
/// Determines whether the next set of item on the stream matches this finder.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>The token.</returns>
public Token?IsMatch(TokenizableStream <char> stream)
{
if (stream.End())
{
return(new Token(
stream.Index,
stream.Index,
TokenType.EOF,
string.Empty
));
}
stream.TakeSnapshot();
var Match = IsMatchImpl(stream);
if (Match == null)
{
stream.RollbackSnapshot();
}
else
{
stream.CommitSnapshot();
}
return(Match);
}
/// <summary>
/// Determines whether the next set of item on the stream matches this finder.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>The token.</returns>
public Token IsMatch(TokenizableStream <char> stream)
{
if (stream.End())
{
return(new Token
{
StartPosition = stream.Index,
EndPosition = stream.Index,
TokenType = TokenType.EOF,
Value = string.Empty
});
}
stream.TakeSnapshot();
var Match = IsMatchImpl(stream);
if (Match == null)
{
stream.RollbackSnapshot();
}
else
{
stream.CommitSnapshot();
}
return(Match);
}