public static bool TryGet(this IJsonVisitor visitor, Type type, out Exception exception, out object result)
{
if (visitor is null)
{
throw new ArgumentNullException(nameof(visitor));
}
if (type is null)
{
throw new ArgumentNullException(nameof(type));
}
exception = null;
result = null;
if (type == typeof(string))
{
result = visitor.ToString();
return(true);
}
if (type.GenericTypeArguments.Length != 0 && type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
return(TryGet(visitor, Nullable.GetUnderlyingType(type), out exception, out result));
}
#if CAN_PREV_CHECK
if (type.IsEnum)
#endif
{
var text = visitor.ToString();
try
{
result = Enum.Parse(type, text);
}
catch (Exception ex)
{
exception = ex;
#if CAN_PREV_CHECK
return(false);
#endif
}
}
#if CAN_PREV_CHECK
if (type.IsPrimitive || type == typeof(decimal))
#endif
{
try
{
result = Convert.ChangeType(visitor.ToString(), type);
return(true);
}
catch (Exception ex)
{
exception = ex;
#if CAN_PREV_CHECK
return(false);
#endif
}
}
var convert = TypeDescriptor.GetConverter(type);
if (convert is null || !convert.CanConvertFrom(typeof(string)))
{
return(false);
}
try
{
result = convert.ConvertFromInvariantString(visitor.ToString());
return(true);
}
catch (Exception ex)
{
exception = ex;
return(false);
}
}
