static void VisitShorthandUnavailableAttribute(LiteralExpression oldAttr, string platformName)
{
var newAttr = new InvocationExpression ("Unavailable");
newAttr.AddArgument (new LiteralExpression (platformName));
oldAttr.Parent.InsertChildBefore (oldAttr, newAttr);
oldAttr.Remove ();
}
static void VisitMacNamedIntroducedAttribute(LiteralExpression oldAttr, string macMinorVersion)
{
var newAttr = new InvocationExpression ("Introduced");
newAttr.AddArgument (new LiteralExpression ("PlatformName.MacOSX"));
newAttr.AddArgument (new LiteralExpression ("10"));
newAttr.AddArgument (new LiteralExpression (macMinorVersion));
oldAttr.Parent.InsertChildBefore (oldAttr, newAttr);
oldAttr.Remove ();
}