private void ParseAdditive(ParseNode parent) // NonTerminalSymbol: Additive
{
Token tok;
ParseNode n;
ParseNode node = parent.CreateNode(_scanner.GetToken(TokenType.Additive), "Additive");
parent.Nodes.Add(node);
// Concat Rule
ParseMultiplicative(node); // NonTerminal Rule: Multiplicative
// Concat Rule
tok = _scanner.LookAhead(TokenType.ADDITIVE); // ZeroOrMore Rule
while (tok.Type == TokenType.ADDITIVE)
{
// Concat Rule
tok = _scanner.Scan(TokenType.ADDITIVE); // Terminal Rule: ADDITIVE
n = node.CreateNode(tok, tok.ToString());
node.Token.UpdateRange(tok);
node.Nodes.Add(n);
if (tok.Type != TokenType.ADDITIVE)
{
tree.Errors.Add(new ParseError(
"Unexpected token '" + tok.Text.Replace("\n", "") + "' found. Expected " + TokenType.ADDITIVE.ToString(), 0x1001, tok));
return;
}
// Concat Rule
ParseMultiplicative(node); // NonTerminal Rule: Multiplicative
tok = _scanner.LookAhead(TokenType.ADDITIVE); // ZeroOrMore Rule
}
parent.Token.UpdateRange(node.Token);
} // NonTerminalSymbol: Additive