init

Telegram/ThirdParty/range-v3/test/iterator/diffmax_t.cpp

@@ -0,0 +1,72 @@
+// Range v3 library
+//
+//  Copyright Eric Niebler 2019-present
+//
+//  Use, modification and distribution is subject to the
+//  Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+// Project home: https://github.com/ericniebler/range-v3
+
+#include <range/v3/iterator/diffmax_t.hpp>
+#include "../simple_test.hpp"
+#include "../test_utils.hpp"
+
+#include <iomanip>
+#include <functional>
+using ranges::detail::diffmax_t;
+
+template<template<typename> class Op>
+void check_1(std::ptrdiff_t a, std::ptrdiff_t b)
+{
+    // std::cout << std::dec;
+    // std::cout << a << "&" << b << " == " << (a&b) << std::endl;
+    // std::cout << std::hex;
+    // std::cout << a << "&" << b << " == " << (a&b) << std::endl;
+    CHECK(Op<diffmax_t>{}(a, b) == Op<std::ptrdiff_t>{}(a, b));
+}
+template<>
+void check_1<std::divides>(std::ptrdiff_t a, std::ptrdiff_t b)
+{
+    if(b)
+        CHECK(std::divides<diffmax_t>{}(a, b) == std::divides<std::ptrdiff_t>{}(a, b));
+}
+template<>
+void check_1<std::modulus>(std::ptrdiff_t a, std::ptrdiff_t b)
+{
+    if(b)
+        CHECK(std::modulus<diffmax_t>{}(a, b) == std::modulus<std::ptrdiff_t>{}(a, b));
+}
+
+template<template<typename> class Op>
+void check()
+{
+    check_1<Op>(0, 0);
+    check_1<Op>(-1, 0);
+    check_1<Op>(0, -1);
+    check_1<Op>(1, 0);
+    check_1<Op>(0, 1);
+    check_1<Op>(1, 1);
+    check_1<Op>(-1, -1);
+    check_1<Op>(-5, -4);
+    check_1<Op>(-4, -5);
+    check_1<Op>(5, -4);
+    check_1<Op>(-4, 5);
+    check_1<Op>(-5, 4);
+    check_1<Op>(4, -5);
+}
+
+int main()
+{
+    check<std::plus>();
+    check<std::minus>();
+    check<std::multiplies>();
+    check<std::divides>();
+    check<std::modulus>();
+    check<std::bit_and>();
+    check<std::bit_or>();
+    check<std::bit_xor>();
+
+    return test_result();
+}