private void ReadNumber(bool startsWithNumber = false)
{
var isDouble = false;
var endsWithNumber = false;
while (true)
{
if (char.IsDigit(Current))
{
if (_position == _start)
{
startsWithNumber = true;
}
endsWithNumber = true;
_position++;
continue;
}
if (Current == '.')
{
endsWithNumber = false;
if (isDouble)
{
_position++;
break;
}
isDouble = true;
_position++;
continue;
}
break;
}
var length = _position - _start;
var text = _text.ToString(_start, length);
if (!endsWithNumber)
{
var span = new TextSpan(_start, length);
var location = new TextLocation(_text, span);
_diagnostics.ReportInvalidExpressionTerm(location, text);
_value = 0;
_kind = SyntaxKind.NumberToken;
}
if (isDouble)
{
if (!double.TryParse(text, out var doubleValue))
{
var span = new TextSpan(_start, length);
var location = new TextLocation(_text, span);
_diagnostics.ReportInvalidNumber(location, text, TypeSymbol.Double);
}
_value = doubleValue;
_kind = SyntaxKind.NumberToken;
}
else
{
if (!int.TryParse(text, out var intValue))
{
var span = new TextSpan(_start, length);
var location = new TextLocation(_text, span);
_diagnostics.ReportInvalidNumber(location, text, TypeSymbol.Int);
}
_value = intValue;
_kind = SyntaxKind.NumberToken;
}
}
