public T MatchAndGet <T>() where T : IToken
{
var next = _scanner.Peek();
if (!(next is T))
{
throw new UnexpectedTokenException("Unexpected token")
{
UnexpectedToken = next,
ExpectedTokenType = typeof(T)
}
}
;
return((T)_scanner.Advance());
}
private void ParseStatementList()
{
var firstSetOfStatement1 = new[]
{
TokenKind.Let, TokenKind.Print
};
MatchOneOf(firstSetOfStatement1);
ParseStatement();
_astBuilder.StmtEnd(_scanner.CurrentToken);
Match(TokenKind.Semicolon);
_scanner.Advance();
var firstSetOfKleeneStar1 = new[]
{
TokenKind.Let, TokenKind.Print
};
while (firstSetOfKleeneStar1.Contains(_scanner.CurrentToken.TokenKind))
{
ParseStatement();
_astBuilder.StmtEnd(_scanner.CurrentToken);
Match(TokenKind.Semicolon);
_scanner.Advance();
}
}
public IRootNode ParseGoal()
{
ParseInput();
Match(TokenKind.Eof);
_scanner.Advance();
return(new RootNode(_astBuilder.TokenDefinitions, _astBuilder.SyntaxTree));
}
