cmake error: undefined reference to `Array::Array(unsigned long)'

Question

I've below Array definition in file templates.hpp

#include <cstddef>
#include <iostream>
using namespace std;

template <typename T>
class Array {
private:
  T* elements;
  size_t count;

public:
  Array(size_t size);
  Array(const Array& other);
  Array(Array&& other);
  virtual ~Array();
  T& operator[](size_t index);
  const T& operator[](size_t index) const;
  Array& operator=(const Array& other);
  Array&& operator=(Array&& other);
  size_t size() { return count; }
};

Below is my templates.cpp file

#include "templates.hpp"
#include <iostream>
#include <cstddef>
using namespace std;


template <typename T>
Array<T>::Array(size_t arraySize)
  try: elements { new T[arraySize]}, count {arraySize} {
    cout<< "sucessfully created the array" << endl;
       }
  catch(const exception& e){
    cerr << " Memory Allocation failure in Array Constructor." << endl;
  }

  template <typename T>
  inline Array<T>::Array(const Array &other) try : elements {
    new T[other.size()]}, count { other.size }
  
  {
        cout<< "sucessfully created the array" << endl;

  }
catch(const exception& e ) {
  
 }

I'm using catch2 library to test my code. Below is my templates_test.cpp file.

#include <iostream>
#include <memory>
#define CATCH_CONFIG_MAIN
#include "catch.hpp"
#include "templates.hpp"
#include <cstddef>
using namespace std;

TEST_CASE("initialize the array", "Array init") {
   Array<int> data {(size_t)5};

}

I'm using cmake to build this project and test. My CMakeLists.txt file is -

cmake_minimum_required(VERSION 3.20 FATAL_ERROR)

project(chapter-01 LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)

add_library(templates templates.hpp templates.cpp)

add_executable(templates_test templates_test.cpp catch.hpp)
target_link_libraries(templates_test templates)

enable_testing()

add_test(NAME catch_template_test COMMAND $<TARGET_FILE:templates_test> --success)

I created build directory and running cmake commands inside build directory. cmake .. is working fine. I ran cmake --build . commands failed. Below is the error trace.

cmake --build . 18:09:50 Consolidate compiler generated dependencies of target templates [ 50%] Built target templates Consolidate compiler generated dependencies of target templates_test [ 75%] Building CXX object CMakeFiles/templates_test.dir/templates_test.cpp.o [100%] Linking CXX executable templates_test /usr/bin/ld: CMakeFiles/templates_test.dir/templates_test.cpp.o: in function ____C_A_T_C_H____T_E_S_T____0()': templates_test.cpp:(.text+0x19eee): undefined reference to Array::Array(unsigned long)' /usr/bin/ld: templates_test.cpp:(.text+0x19f52): undefined reference to Array<int>::~Array()' /usr/bin/ld: templates_test.cpp:(.text+0x19f92): undefined reference to Array::~Array()' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/templates_test.dir/build.make:98: templates_test] Error 1 make1: *** [CMakeFiles/Makefile2:85: CMakeFiles/templates_test.dir/all] Error 2 make: *** [Makefile:101: all] Error 2

I check this stackoverflow post and its original post. I'm using cmake where those post author used gcc to compile directly.

Also, I've added both files templates.hpp templates.cpp in the add_library too.

How can I fix this issue?