Static vector of array

Question

I would like to have a 2D static vector that can be extended in one direction. A static vector of array sounded right to me:

struct A
{
    public:
        static std::vector<std::array<float, 3> > theTable;
};

I tried to access it from main with:

A::theTable.push_back({0.0, 0.0, 0.0});

But I get "no matching function for call to std::vector<std::array<float, 3ul> >::push_back(<brace-enclosed initializer list>)"

How can I declare this vector of array and then use if properly from anywhere else?

kiviak · Accepted Answer · 2015-07-06 06:55:32Z

2

it looks like you have not defined theTable

struct A
{
    public:
        static std::vector<std::array<float, 3> > theTable;
};
std::vector<std::array<float, 3> > A::theTable; //define

answered Jul 6, 2015 at 6:55

kiviak

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1 Comment

Indeed that was needed. But I also need paddy's answer to get it to work!

paddy · Accepted Answer · 2015-07-06 05:57:32Z

2

You're pushing an array of doubles, not floats. Change the 0.0 values to 0.0f.

If you still have issues, it might be that you need an extra set of braces. When I compile that in G++ with all warnings, I get the warning:

suggest braces around initialization of subobject [-Wmissing-braces]

So, the correct code should be:

A::theTable.push_back({{0.0f, 0.0f, 0.0f}});

answered Jul 6, 2015 at 5:52

paddy

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