private TokenId ParseString(CharacterReader reader)
{
while (reader.Peek() != '\"')
{
reader.Read();
}
reader.Read();
return(TokenId.String);
}
private TokenId GetNextTokenId()
{
char ch = _reader.Read();
if ((ch == '\n') || (char.IsWhiteSpace(ch)))
{
while ((_reader.Peek() == '\n') || (char.IsWhiteSpace(_reader.Peek())))
{
_reader.Read();
}
return(TokenId.Whitespace);
}
switch (ch)
{
case ',':
return(TokenId.Comma);
case ':':
return(TokenId.Colon);
case '[':
return(TokenId.OpenSquareBrace);
case ']':
return(TokenId.CloseSquareBrace);
case '{':
return(TokenId.OpenCurlyBrace);
case '}':
return(TokenId.CloseCurlyBrace);
case '\"':
return(ParseString(_reader));
case 'n':
return(ParseNull(_reader));
default:
if ((ch == '-') || (ch >= '0') && (ch <= '9'))
{
return(ParseNumber(_reader));
}
return(TokenId.None);
}
}
private TokenId ParseNumber(CharacterReader reader)
{
while (char.IsNumber(reader.Peek()) || (reader.Peek() == '.'))
{
reader.Read();
}
return(TokenId.Number);
}
private TokenId ParseNull(CharacterReader reader)
{
if (reader.Peek() != 'u')
{
throw new InvalidOperationException();
}
reader.Read();
if (reader.Peek() != 'l')
{
throw new InvalidOperationException();
}
reader.Read();
if (reader.Peek() != 'l')
{
throw new InvalidOperationException();
}
reader.Read();
return(TokenId.Null);
}