使用模板在编译时跨结构字段迭代

我不清楚如何使用顶点结构器和绑定字符串构建D3D11\u INPUT\u ELEMENT\u DESC。然而,以下尝试可能会帮助您实现目标:

#include <thread>
#include <iostream>

const char* bin[] = {
    "pos",
    "col",
    "normal",
    "other"
};

class desc {
    public:
    constexpr desc() : desText(0){}
    constexpr desc(const char * str): desText(str) {}
    constexpr desc operator+(const desc) { return *this; }
    void printName() { std::cout << desText << std::endl;}
    const char* desText;
};

const int ARRAY_SIZE = 4;

template <int N, int I=N-1>
class Table : public Table<N, I-1>
{
public:
    static const desc dummy;
};

template <int N>
class Table<N, 0>
{
public:
    static const desc dummy;
    static desc array[N];
};

template <int N, int I>
const desc Table<N, I>::dummy = Table<N, 0>::array[I] = desc(bin[I]) + Table<N, I-1>::dummy;

template <int N>
const desc Table<N, 0>::dummy = Table<N, 0>::array[0] = desc(bin[0]);

template <int N>
desc Table<N, 0>::array[N];

template class Table<ARRAY_SIZE>;

int main(int, char**)
{
    for (int i=0; i < ARRAY_SIZE; ++i)
        Table<ARRAY_SIZE>::array[i].printName();
}

live example