public void Expect(char expected)
{
var found = GetNext();
if (found != expected)
{
throw ParsingException.UnexpectedCharacter(expected, found, GetLocation());
}
}
public SqlToken ParseNext()
{
var c = _chars.Peek();
if (c == '\0')
{
return(SqlToken.EndOfInput());
}
if (char.IsWhiteSpace(c))
{
return(ReadWhitespace());
}
if (char.IsNumber(c))
{
return(ReadNumber());
}
if (char.IsLetter(c) || c == '_')
{
return(ReadWord());
}
if (c == '$' || c == '#')
{
return(ReadSpecialIdentifier());
}
if (c == '@')
{
return(ReadVariableName());
}
if (c == '\'')
{
return(ReadQuoted());
}
if (c == '[')
{
return(ReadQuotedIdentifier());
}
if (c == '-')
{
_chars.GetNext();
if (_chars.Peek() == '-')
{
return(ReadSingleLineComment());
}
_chars.PutBack(c);
// Fall through, in case we're using '-' for some other purpose
}
if (c == '/')
{
_chars.GetNext();
if (_chars.Peek() == '*')
{
return(ReadMultilineComment());
}
_chars.PutBack(c);
// Fall through, in case we're using '/' for some other purpose
}
if (char.IsPunctuation(c) || char.IsSymbol(c))
{
return(ReadOperator());
}
throw ParsingException.UnexpectedCharacter(c, _chars.GetLocation());
}
