public static IAttribute <string> GetString(this IElement element, string property, string defaultValue)
{
return(element[property].Convert(
parse: p => Parsed.Success(p, p),
serialize: d => d,
defaultValue: defaultValue));
}
static Parsed <double> TryParseAngle(string str)
{
double value;
if (double.TryParse(str.StripSuffix("deg"), out value))
{
return(Parsed.Success(value, str));
}
return(Parsed.Failure <double>(str));
}
public static IAttribute <string> Value(IElement element)
{
var valueFromAttribute = element["Value"];
var valueFromContent = element.Content;
return(valueFromContent
.Select(contentValue =>
contentValue.HasValue
? valueFromContent
: valueFromAttribute)
.Switch()
.Convert(s => Parsed.Success(s, s), s => s, ""));
}