C++ 不允许直接对 std::array<T1, N> 进行 static_cast 到 std::array<T2, N>，即使 T1 和 T2 是可转换类型。

改成显式地把每一个 unsigned long long 元素转换为 uint32_t

network_process/interface/fwd_types.hpp

@@ -267,7 +267,12 @@ template <size_t N>
 struct equal_to<pod_key_t<N>> {
     bool operator()(const pod_key_t<N>& k1, const pod_key_t<N>& k2) const
     {
-        return static_cast<std::array<uint32_t, N>>(k1) == static_cast<std::array<uint32_t, N>>(k2);
+        std::array<uint32_t, N> a, b;
+        for (size_t i = 0; i < N; ++i) {
+            a[i] = static_cast<uint32_t>(k1[i]);
+            b[i] = static_cast<uint32_t>(k2[i]);
+        }
+        return a == b;
     }
 };
 } // namespace std