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Thirdparty/Pangolin/include/pangolin/utils/variadic_all.h

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+#pragma once
+
+#include <tuple>
+
+namespace pangolin {
+
+template<typename TPred, typename T>
+bool all_of(TPred pred, const T& i)
+{
+    return pred(i);
+}
+
+template<typename TPred, typename T, typename... Targs>
+bool all_of(const TPred& pred, const T& i, const Targs& ... ins)
+{
+    return pred(i) && all_of(pred, ins...);
+}
+
+template<typename TPred, typename T>
+bool any_of(TPred pred, const T& i)
+{
+    return pred(i);
+}
+
+template<typename TPred, typename T, typename... Targs>
+bool any_of(const TPred& pred, const T& i, Targs& ... ins)
+{
+    return pred(i) || any_of(pred, ins...);
+}
+
+template<typename TContainer, typename... Targs>
+bool all_found(const TContainer& c, const Targs& ... its)
+{
+    using T1 = typename std::tuple_element<0, std::tuple<Targs...>>::type;
+    return all_of([&c](const T1& it){return it != c.end();}, its...);
+}
+
+template<typename T, typename... Targs>
+bool all_equal(const T& v1, const Targs& ... its)
+{
+    return all_of([v1](const T& o){return v1 == o;}, its...);
+}
+
+}