Edge with no default empty constructor (Edge{})

[IkarusDeveloper]

I m really confused about the fact that Edge seems to doesn't allow any empty initialization, a requirement which any value_type used in a std::vector must allow.

But the function (member of Triangulation) is accepting std::vector<Edge> as argument.
void insertEdges(const std::vector<Edge>& edges);
Here the interface of class Edge.

struct CDT_EXPORT Edge
{
    /// Constructor
    Edge(VertInd iV1, VertInd iV2);
    /// Assignment operator
    bool operator==(const Edge& other) const;
    /// V1 getter
    VertInd v1() const;
    /// V2 getter
    VertInd v2() const;
    /// Edges' vertices
    const std::pair<VertInd, VertInd>& verts() const;

private:
    std::pair<VertInd, VertInd> m_vertices;
};

What i m not getting here?
Thank you in advance.

Once i added an empty constructor to the class all the compilation errors just disappeared, so i m still confused.
Edge() = default;

[artem-ogre]

Hi, @IkarusDeveloper,

From std::vector docs:

T must meet the requirements of CopyAssignable and CopyConstructible.

which Edge satisfies.

I am not sure what compilation errors you are referring to.

[IkarusDeveloper]

Sorry for bothering you, i've already starred your repo, i really appreciate your effort.
Here's a minimal reproducible example.
https://godbolt.org/z/K1hT9dKbz
It looks resize wont work on Edges vectors.
I think you should make it usable, it may optimize some stuff.
And it again happen while inserting with emplace_back using overload with no arguments.
auto& edge = vector_break.emplace_back();

[artem-ogre]

Yes resize would not work as the value needs to be default constructible. It is still possible to use reserve, push_back and emplace_back.

[IkarusDeveloper]

So i have to correct myself.
The empty constructor isn't required to instantiate a vector of Edge.
It it just required in order to use some vector's stuffs (vector constructor with size, vector.resize. some overload of vector.emplace_back and probably something I'm not thinking about right now)