unexpected behavior when explicitly instantiating a template #123
Description
I'm not sure what the expected behavior is, but this snippet shows no template instantiation code being generated:
template<typename T>
struct Person
{
int age, heightInInches;
T distanceTraveled = T(); //default value
float hairLength, GPA;
unsigned int SATScore;
T run(T speed, bool startWithLeftFoot);
};
template<typename T>
T Person<T>::run(T speed, bool left )
{
return speed + (left ? 1 : 0);
}
template struct Person<int>;
int main()
{
Person<int> f;
auto x = f.run(2, true);
}
If you comment out the template struct Person<int>; it generates the expected template code.
Any ideas on why this happens?
I was expecting to this:
/* First instantiated from: insights.cpp:22 */
#ifdef INSIGHTS_USE_TEMPLATE
template<>
struct Person<int>
{
int age;
int heightInInches;
int distanceTraveled = int();
float hairLength;
float GPA;
unsigned int SATScore;
int run(int speed, bool left)
{
return speed + (left ? 1 : 0);
}
// inline Person() noexcept = default;
// inline constexpr Person(const Person<int> &) = default;
// inline constexpr Person(Person<int> &&) = default;
};