/// <summary>
/// Tries whether after an vertex there is a comma, if there is the comma, that means there are more patterns to parse.
/// </summary>
/// <returns> Start of a new pattern. </returns>
static private Node ParseNewPatternExpr(ref int position, List <Token> tokens)
{
// Checks for comma, after comma next pattern must be
if (!CheckToken(position, Token.TokenType.Comma, tokens))
{
return(null);
}
position++;
MatchDividerNode matchDivider = new MatchDividerNode();
Node newPattern = ParseVertex(ref position, tokens);
if (newPattern == null)
{
ThrowError("Match parser", "Expected Vertex after comma.", position, tokens);
}
matchDivider.AddNext(newPattern);
return(matchDivider);
}
/// <summary>
/// Serves as a dividor of multiple patterns.
/// Create new pattern and start its parsing.
/// </summary>
public void Visit(MatchDividerNode node)
{
currentPattern = new ParsedPattern();
result.Add(currentPattern);
node.next.Accept(this);
}
public void Visit(MatchDividerNode node)
{
throw new NotImplementedException();
}