co-cpp19/src/array19.lib/array19/Zip.test.cpp at develop · basicpp/co-cpp19 · GitHub

23 lines (20 loc) · 517 Bytes

#include "Zip.h"

#include "Array.h"

using namespace array19;

void constexpr_Zip_test() {

constexpr auto sum = [] {

auto a = Array{1, 2, 3};

unsigned b[] = {4, 5, 6};

auto r = 0;

#ifdef _MSC_VER

auto z = Zip{a, b}; // cl crashes if we inline this && run it as constexpr

for (auto [va, vb] : z) {

#else

for (auto [va, vb] : Zip{a, b}) {

#endif

r += va * vb;

}

return r;

}();

static_assert(sum == (1 * 4) + (2 * 5) + (3 * 6));

}

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