std::vector 中的 C++ 外部类（定义格式错误）

我在一个外部库中构建了一个类，我希望在其他领域使用它。但是，当我尝试在 std::vector 中使用该类时，出现编译错误

                 from ../../src/geom/geom.cpp:21:
/usr/include/c++/4.8.2/ext/new_allocator.h: In instantiation of `void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = GenUtils::MeshNormalData; _Args = {const GenUtils::MeshNormalData&}; _Tp = GenUtils::MeshNormalData]`:
/usr/include/c++/4.8.2/bits/alloc_traits.h:254:4:   required from `static typename std::enable_if<std::allocator_traits<_Alloc>::__construct_helper<_Tp, _Args>::value, void>::type std::allocator_traits<_Alloc>::_S_construct(_Alloc&, _Tp*, _Args&& ...) [with _Tp = GenUtils::MeshNormalData; _Args = {const GenUtils::MeshNormalData&}; _Alloc = std::allocator<GenUtils::MeshNormalData>; typename std::enable_if<std::allocator_traits<_Alloc>::__construct_helper<_Tp, _Args>::value, void>::type = void]`
/usr/include/c++/4.8.2/bits/alloc_traits.h:393:57:   required from `static decltype (_S_construct(__a, __p, (forward<_Args>)(std::allocator_traits::construct::__args)...)) std::allocator_traits<_Alloc>::construct(_Alloc&, _Tp*, _Args&& ...) [with _Tp = GenUtils::MeshNormalData; _Args = {const GenUtils::MeshNormalData&}; _Alloc = std::allocator<GenUtils::MeshNormalData>; decltype (_S_construct(__a, __p, (forward<_Args>)(std::allocator_traits::construct::__args)...)) = <type error>]`
/usr/include/c++/4.8.2/bits/stl_vector.h:906:34:   required from `void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = GenUtils::MeshNormalData; _Alloc = std::allocator<GenUtils::MeshNormalData>; std::vector<_Tp, _Alloc>::value_type = GenUtils::MeshNormalData]’
../../src/geom/geom.cpp:315:47:   required from here
/usr/include/c++/4.8.2/ext/new_allocator.h:120:4: error: use of deleted function `GenUtils::MeshNormalData::MeshNormalData(const GenUtils::MeshNormalData&)`
  { ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }
    ^
In file included from ../../src/geom/geom.h:60:0,
                 from ../../src/geom/geom.cpp:21:
../../src/libs/utils/generalUtils.h:94:7: note: `GenUtils::MeshNormalData::MeshNormalData(const GenUtils::MeshNormalData&)` is implicitly deleted because the default definition would be ill-formed:
 class MeshNormalData

在库/generalUtils.h

namespace GenUtils
{
   class MeshNormalData
   {
   public:
      MeshNormalData(){}
   };
}

在 geom.h

#include generalUtils.h

class TestGeo : public Base
{
public:
    TestGeo(){};
private:
    std::vector< GenUtils::MeshNormalData > meshnormals;
    void compute_geo();
};

在geom.cpp中

void TestGeo::compute_geo()
{
    meshnormals.clear()
    GenUtils::MeshNormalData normals()
    //- doing other computation on normals
    meshnormals.push_back( normals );
}

我错过了什么？有什么建议吗？需要帮助破译我的错误。