初始化向量的元組類成員初始化列表

我有一個數據結構：初始化向量的元組類成員初始化列表

using Delaunay = CGAL::Delaunay_triangulation_3<K, Tds>; 
using Cell_handle = Delaunay::Cell_handle; 
using Vertex_handle = Delaunay::Vertex_handle; 
using Edge_handle = std::tuple<Cell_handle, std::uintmax_t, std::uintmax_t>; 
using geometry_tuple = std::tuple<std::vector<Cell_handle>, 
           std::vector<Cell_handle>, 
           std::vector<Cell_handle>, 
           std::vector<Edge_handle>, 
           std::uintmax_t, 
           std::vector<Vertex_handle>>;

，我想在一個默認的構造函數來初始化：

struct SimplicialManifold { 
/// Default constructor with proper initialization 
SimplicialManifold() 
     : triangulation{std::make_unique<Delaunay>()}, 
     geometry{std::make_tuple(0, 0, 0, 0, 0, 0)} {} 

std::unique_ptr<Delaunay> triangulation; 
///< std::unique_ptr to the Delaunay triangulation 

geometry_tuple geometry; 
///< The geometric structure of the triangulation 
};

上面的代碼工作在Apple LLVM V7.3.0（clang-703.0.29），但在GCC 5.2中失敗，帶有大量模板編譯器goo：

../src/S3Triangulation.h: In constructor ‘SimplicialManifold::SimplicialManifold()’../src/S3Triangulation.h:493:55: error: no matching function for call to 
‘std::tuple<std::vector<CGAL::CCC_internal::CCC_iterator<CGAL::Concurrent_compact_container<CGAL::Triangulation_cell_base_with_info_3<long unsigned int, CGAL::Epick, CGAL::Triangulation_cell_base_3<CGAL::Epick, CGAL::Triangulation_ds_cell_base_3<CGAL::Triangulation_data_structure_3<CGAL::Triangulation_vertex_base_with_info_3<long unsigned int, CGAL::Epick, CGAL::Triangulation_vertex_base_3<CGAL::Epick, CGAL::Triangulation_ds_vertex_base_3<void> > >, CGAL::Triangulation_cell_base_with_info_3<long unsigned int, CGAL::Epick, CGAL::Triangulation_cell_base_3<CGAL::Epick, CGAL::Triangulation_ds_cell_base_3<void> > >, CGAL::Parallel_tag> > > >, tbb::scalable_allocator<CGAL::Triangulation_cell_base_with_info_3<long unsigned int, CGAL::Epick, CGAL::Triangulation_cell_base_3<CGAL::Epick, CGAL::Triangulation_ds_cell_base_3<CGAL::Triangulation_data_structure_3<CGAL::Triangulation_vertex_base_with_info_3<long unsigned int, CGAL::Epick, CGAL::Triangulation_vertex_base_3<CGAL::Epick, CGAL::Triangulation_ds_vertex_base_3<void> > >, CGAL::Triangulation_cell_base_with_info_3<long unsigned int, CGAL::Epick, CGAL::Triangulation_cell_base_3<CGAL::Epick, CGAL::Triangulation_ds_cell_base_3<void> > >, CGAL::Parallel_tag> > > > > >, false>, std::allocator<CGAL::CCC_internal::CCC_iterator<CGAL::Concurrent_compact_container<CGAL::Triangulation_cell_base_with_info_3<long unsigned int, CGAL::Epick, CGAL::Triangulation_cell_base_3<CGAL::Epick,

（有問題的代碼是https://github.com/acgetchell/CDT-plusplus/blob/functional/src/S3Triangulation.h開始上線467）

我看着初始化列表，但是這些不工作：如何做到這一點，讓GCC快樂

geometry{std::initializer_list<std::vector<Cell_handle>, 
       std::vector<Cell_handle>, 
       std::vector<Cell_handle>, 
       std::vector<Edge_handle>, 
       std::uintmax_t, 
       std::vector<Vertex_handle>>({0, 0, 0, 0, 0, 0}) 
     } {}

建議？

來源

2016-04-26 Adam Getchell

你用-std = C++ 11標誌編譯過嗎？ – bashrc

是的，實際上使用-std = C++ 1y –

'tuple'值 - 無論如何都初始化它的元素，所以這是多餘的。 –

最好的解決方案是寫一個合適的結構或類而不是濫用std::tuple。例如：

struct geometry_tuple 
{ 
    std::array<std::vector<Cell_handle>, 3> cells; 
    std::vector<Edge_handle> edges; 
    std::uintmax_t max; 
    std::vector<Vertex_handle> vertexes; 

    geometry_tuple() 
     : max(0) 
    { 
     // ... 
    } 
};

這使得您的代碼具有描述性的名稱爲每個字段，而不是以後做.get<2>()等。它可以讓你與你可能需要的任何參數的構造函數正確清晰。

來源

2016-04-26 06:07:03

這是_definitely_正確的路要走。 – Charles

初始化向量的元組類成員初始化列表

回答

相關問題