lldb/test/API/lang/cpp/template/main.cpp

   1 #include <tuple>
   2
   3 template <int Arg>
   4 class TestObj
   5 {
   6 public:
   7   int getArg()
   8   {
   9     return Arg;
  10   }
  11 };
  12
  13 //----------------------------------------------------------------------
  14 // Define a template class that we can specialize with an enumeration
  15 //----------------------------------------------------------------------
  16 enum class EnumType
  17 {
  18     Member,
  19     Subclass
  20 };
  21
  22 template <EnumType Arg> class EnumTemplate;
  23
  24 //----------------------------------------------------------------------
  25 // Specialization for use when "Arg" is "EnumType::Member"
  26 //----------------------------------------------------------------------
  27 template <>
  28 class EnumTemplate<EnumType::Member>
  29 {
  30 public:
  31     EnumTemplate(int m) :
  32         m_member(m)
  33     {
  34     }
  35
  36     int getMember() const
  37     {
  38         return m_member;
  39     }
  40
  41 protected:
  42     int m_member;
  43 };
  44
  45 //----------------------------------------------------------------------
  46 // Specialization for use when "Arg" is "EnumType::Subclass"
  47 //----------------------------------------------------------------------
  48 template <>
  49 class EnumTemplate<EnumType::Subclass> :
  50     public EnumTemplate<EnumType::Member>
  51 {
  52 public:
  53     EnumTemplate(int m) : EnumTemplate<EnumType::Member>(m)
  54     {
  55     }
  56 };
  57
  58 template <typename FLOAT> struct T1 { FLOAT f = 1.5; };
  59 template <typename FLOAT> struct T2 { FLOAT f = 2.5; int i = 42; };
  60 template <typename FLOAT, template <typename> class ...Args> class C { std::tuple<Args<FLOAT>...> V; };
  61
  62 int main(int argc, char **argv)
  63 {
  64   TestObj<1> testpos;
  65   TestObj<-1> testneg;
  66   EnumTemplate<EnumType::Member> member(123);
  67   EnumTemplate<EnumType::Subclass> subclass(123*2);
  68   C<float, T1> c1;
  69   C<double, T1, T2> c2;
  70   return testpos.getArg() - testneg.getArg() + member.getMember()*2 - subclass.getMember(); // Breakpoint 1
  71 }