Спринт 14. Variadic Templates. Задание 1.

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equals_to_one_of.cpp
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#include <cassert>
#include <string>
#include <string_view>

template <typename T, typename... Args>
bool EqualsToOneOf(const T& var, const Args&... args) {
  return ((var == args) || ...);
}

int main() {
    using namespace std::literals;

    assert(EqualsToOneOf("hello"sv, "hi"s, "hello"s));
    assert(!EqualsToOneOf(1, 10, 2, 3, 6));
    assert(!EqualsToOneOf(8));
}