如何调试C++编译阶段的模板特化与静态断言过程

我正在编写一个文件解析器，为避免同一函数的多实现编写了如下代码：

#include <string>
#include <type_traits>
#include <vector>
#include <stdexcept>

class VertexTexture {
private:
  float m_u, m_v;

public:
  // helper functions ...
  inline void set_u(float u) { m_u = u; }
  inline void set_v(float v) { m_v = v; }
};

class ObjParser {
private:
  std::vector<VertexTexture> m_textures; // store all VertexTextures
  std::string m_line;                    // current line in file
  // ...
public:
  template <typename Container>
  void parseUVfloats(const std::string &line,
                     std::back_insert_iterator<Container> elem_iter);
  // parse VertexTexture from `m_line` and push the result into `m_textures`
  // You can check implementation below
  void parseVertexTexture() {
    parseUVfloats(m_line, std::back_inserter(m_textures));
    // ...
  }
};

// <=== check if `T` has `m_u` and `m_v` in `float` type
template <typename T, typename = void>
struct HasUVFloatMembers : std::false_type {};

template <typename T>
struct HasUVFloatMembers<T, std::void_t<decltype(&T::m_u), decltype(&T::m_v)>>
    : std::integral_constant<
          bool, std::is_floating_point<decltype(T::m_u)>::value &&
                    std::is_floating_point<decltype(T::m_v)>::value> {};
// ===>

template <typename Container>
void ObjParser::parseUVfloats(const std::string &line,
                              std::back_insert_iterator<Container> elem_iter) {
  // static assertion, if I comment this, everything works fine
  static_assert(HasUVFloatMembers<typename Container::value_type>::value,
                "Container must have m_u, m_v members in float type.");

  std::vector<std::string> split_result = {
      "f", "1.0", "2.0"}; // split the line and get the result

  typename Container::value_type elem;
  try {
    elem.set_u(std::stof(split_result.at(1)));
    elem.set_v(std::stof(split_result.at(2)));
  } catch (const std::out_of_range &e) {
    exit(EXIT_FAILURE);
  }
  *elem_iter = elem;
}

int main() {}

编译时出现如下错误：

/home/insights/insights.cpp:48:17: 错误：静态断言失败，要求‘HasUVFloatMembers<VertexTexture, void>::value’成立：容器必须拥有float类型的m_u、m_v成员。
   48 |   static_assert(HasUVFloatMembers<typename Container::value_type>::value,
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/insights/insights.cpp:28:5: 注：此处实例化函数模板特化‘ObjParser::parseUVfloats<std::vector<VertexTexture>>’，请求来自第28行
   28 |     parseUVfloats(m_line, std::back_inserter(m_textures));
      |     ^
1 error generated.
Error while processing /home/insights/insights.cpp.

注释掉静态断言后代码可正常运行且结果正确，但我对此十分困惑，想知道是否有办法查看编译阶段模板特化与静态断言的执行过程？

更新 #

若在C++17中将m_u和m_v设为公有，编译即可成功。

内容的提问来源于stack exchange，提问作者LiuYuan