private void ParsePrimary(ParseNode parent) // NonTerminalSymbol: Primary
{
Token tok;
ParseNode n;
ParseNode node = parent.CreateNode(_scanner.GetToken(TokenType.Primary), "Primary");
parent.Nodes.Add(node);
tok = _scanner.LookAhead(TokenType.IDENTIFIER, TokenType.OPENCURLY, TokenType.NEW, TokenType.STRING, TokenType.INTEGER, TokenType.REAL,
TokenType.OPENPAREN); // Choice Rule
switch (tok.Type)
{
// Choice Rule
case TokenType.IDENTIFIER:
ParseStatement(node); // NonTerminal Rule: Statement
break;
case TokenType.OPENCURLY:
case TokenType.NEW:
ParseNewJson(node); // NonTerminal Rule: NewJson
break;
case TokenType.STRING:
case TokenType.INTEGER:
case TokenType.REAL:
ParseValue(node); // NonTerminal Rule: Value
break;
case TokenType.OPENPAREN:
// Concat Rule
tok = _scanner.Scan(TokenType.OPENPAREN); // Terminal Rule: OPENPAREN
n = node.CreateNode(tok, tok.ToString());
node.Token.UpdateRange(tok);
node.Nodes.Add(n);
if (tok.Type != TokenType.OPENPAREN)
{
tree.Errors.Add(
new ParseError("Unexpected token '" + tok.Text.Replace("\n", "") + "' found. Expected " + TokenType.OPENPAREN.ToString(), 0x1001, tok));
return;
}
// Concat Rule
ParseExpression(node); // NonTerminal Rule: Expression
// Concat Rule
tok = _scanner.Scan(TokenType.CLOSEPAREN); // Terminal Rule: CLOSEPAREN
n = node.CreateNode(tok, tok.ToString());
node.Token.UpdateRange(tok);
node.Nodes.Add(n);
if (tok.Type != TokenType.CLOSEPAREN)
{
tree.Errors.Add(
new ParseError("Unexpected token '" + tok.Text.Replace("\n", "") + "' found. Expected " + TokenType.CLOSEPAREN.ToString(), 0x1001,
tok));
return;
}
break;
default:
tree.Errors.Add(
new ParseError(
"Unexpected token '" + tok.Text.Replace("\n", "")
+ "' found. Expected IDENTIFIER, OPENCURLY, NEW, STRING, INTEGER, REAL, or OPENPAREN.", 0x0002, tok));
break;
} // Choice Rule
parent.Token.UpdateRange(node.Token);
} // NonTerminalSymbol: Primary
