Add Support for Gtest Typed Tests

[theNerd247]

[ibtaylor]

This is what I've been toying around with for now:

#define RC_GTEST_TYPED_PROP(CaseName, TestName, ArgList)                                                                 \
  template<typename TypeParam> void rapidCheck_propImpl_##CaseName##_##TestName ArgList;                                 \
  TYPED_TEST(CaseName, TestName) { ::rc::detail::checkGTest(&rapidCheck_propImpl_##CaseName##_##TestName<TypeParam>); }  \
  template<typename TypeParam> void rapidCheck_propImpl_##CaseName##_##TestName ArgList

template <typename T> class FooTest : public ::testing::Test {};
using FooTestTypes = ::testing::Types<int8_t,int16_t,int32_t,int64_t>;
TYPED_TEST_CASE(FooTest, FooTestTypes);

// just nonsense examples
RC_GTEST_TYPED_PROP(FooTest, Prop1, (TypeParam x)) { RC_ASSERT(x == x); }
RC_GTEST_TYPED_PROP(FooTest, Prop2, (TypeParam x)) { RC_ASSERT(x != x); }

I can update as I find issues.