Syntax coloration error with preprocessor

#include <boost/preprocessor/seq/for_each.hpp>
#include <boost/preprocessor/comma_if.hpp>
#include <boost/preprocessor/variadic/size.hpp>

#define PP_NARGS(...) BOOST_PP_VARIADIC_SIZE(__VA_ARGS__)

#define PP_GENERATOR(r, data, elem) typename ExceptionChecker<elem>::type

#define PP_WRAP_IMPL(count, ...) BOOST_PP_SEQ_FOR_EACH(PP_GENERATOR, BOOST_PP_COMMA, PP_WRAP_ ## count(__VA_ARGS__))
#define PP_WRAP(count, ...) PP_WRAP_IMPL(count, __VA_ARGS__)

#define PP_WRAP_1(v1) (v1)
#define PP_WRAP_2(v1, v2) (v1)(v2)
#define PP_WRAP_3(v1, v2, v3) (v1)(v2)(v3)
#define PP_WRAP_4(v1, v2, v3, v4) (v1)(v2)(v3)(v4)
#define PP_WRAP_5(v1, v2, v3, v4, v5) (v1)(v2)(v3)(v4)(v5)
#define PP_WRAP_6(v1, v2, v3, v4, v5, v6) (v1)(v2)(v3)(v4)(v5)(v6)
#define PP_WRAP_7(v1, v2, v3, v4, v5, v6, v7) (v1)(v2)(v3)(v4)(v5)(v6)(v7)
#define PP_WRAP_8(v1, v2, v3, v4, v5, v6, v7, v8) (v1)(v2)(v3)(v4)(v5)(v6)(v7)(v8)
#define PP_WRAP_9(v1, v2, v3, v4, v5, v6, v7, v8, v9) (v1)(v2)(v3)(v4)(v5)(v6)(v7)(v8)(v9)
#define PP_WRAP_10(v1, v2, v3, v4, v5, v6, v7, v8, v9, v10) (v1)(v2)(v3)(v4)(v5)(v6)(v7)(v8)(v9)(v10)

#define THROWS(...)\
    throw(RuntimeException, PP_WRAP(PP_NARGS(__VA_ARGS__), __VA_ARGS__))

class RuntimeException
{};

class AnyOtherException
{};

template <typename ExceptionT>
struct ExceptionChecker
{
    typedef ExceptionT type;
};

void testFunc() THROWS(AnyOtherException) // <-- 'expected a declaration' with red underscore
{
}