internal void Write(ReadOnlySpan <char> s)
{
offset += Quoting.Quote(s, Remaining);
}
/// <summary>
/// Advance to the next token, throwing a JsonException on a parse error.
/// </summary>
public bool MoveNext()
{
if (Current == JsonToken.Eof)
{
return(false);
}
begin = end;
while (begin < last && char.IsWhiteSpace(buffer[begin]))
{
begin++;
}
if (begin == last)
{
end = begin;
Current = JsonToken.Eof;
}
else
{
switch (buffer[begin])
{
case '{':
Current = JsonToken.ObjectStart;
end = begin + 1;
break;
case '}':
Current = JsonToken.ObjectEnd;
end = begin + 1;
break;
case '[':
Current = JsonToken.ArrayStart;
end = begin + 1;
break;
case ']':
Current = JsonToken.ArrayEnd;
end = begin + 1;
break;
case ':':
Current = JsonToken.Colon;
end = begin + 1;
break;
case ',':
Current = JsonToken.Comma;
end = begin + 1;
break;
case '"':
var(qchars, uchars) = Quoting.Unquote(Slice());
Current = JsonToken.String;
end = begin + qchars;
CurrentSegment = Slice(uchars);
return(true);
case 't':
if (MatchTrue())
{
Current = JsonToken.Bool;
end = begin + 4;
}
else
{
goto default;
}
break;
case 'f':
if (MatchFalse())
{
Current = JsonToken.Bool;
end = begin + 5;
}
else
{
goto default;
}
break;
case 'n':
if (MatchNull())
{
Current = JsonToken.Null;
end = begin + 4;
}
else
{
goto default;
}
break;
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
var nchars = MatchNumber();
if (nchars > 0)
{
Current = JsonToken.Number;
end = begin + nchars;
}
else
{
goto default;
}
break;
default:
throw new JsonException(segment, begin, false, "unexpected character");
}
}
CurrentSegment = Slice(end - begin);
return(true);
}