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Telegram/ThirdParty/range-v3/test/algorithm/count.cpp

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+// Range v3 library
+//
+//  Copyright Andrew Sutton 2014
+//
+//  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/core.hpp>
+#include <range/v3/algorithm/count.hpp>
+#include "../simple_test.hpp"
+#include "../test_iterators.hpp"
+
+struct S
+{
+    int i;
+};
+
+int main()
+{
+    using namespace ranges;
+
+    int ia[] = {0, 1, 2, 2, 0, 1, 2, 3};
+    constexpr auto cia = size(ia);
+
+    CHECK(count(InputIterator<const int*>(ia),
+                Sentinel<const int*>(ia + cia), 2) == 3);
+    CHECK(count(InputIterator<const int*>(ia),
+                Sentinel<const int*>(ia + cia), 7) == 0);
+    CHECK(count(InputIterator<const int*>(ia),
+                Sentinel<const int*>(ia), 2) == 0);
+
+    CHECK(count(make_subrange(InputIterator<const int*>(ia),
+                      Sentinel<const int*>(ia + cia)), 2) == 3);
+    CHECK(count(make_subrange(InputIterator<const int*>(ia),
+                      Sentinel<const int*>(ia + cia)), 7) == 0);
+    CHECK(count(make_subrange(InputIterator<const int*>(ia),
+                      Sentinel<const int*>(ia)), 2) == 0);
+
+    S sa[] = {{0}, {1}, {2}, {2}, {0}, {1}, {2}, {3}};
+    constexpr auto csa = size(ia);
+
+    CHECK(count(InputIterator<const S*>(sa),
+                Sentinel<const S*>(sa + csa), 2, &S::i) == 3);
+    CHECK(count(InputIterator<const S*>(sa),
+                Sentinel<const S*>(sa + csa), 7, &S::i) == 0);
+    CHECK(count(InputIterator<const S*>(sa),
+                Sentinel<const S*>(sa), 2, &S::i) == 0);
+
+    CHECK(count(make_subrange(InputIterator<const S*>(sa),
+                      Sentinel<const S*>(sa + csa)), 2, &S::i) == 3);
+    CHECK(count(make_subrange(InputIterator<const S*>(sa),
+                      Sentinel<const S*>(sa + csa)), 7, &S::i) == 0);
+    CHECK(count(make_subrange(InputIterator<const S*>(sa),
+                      Sentinel<const S*>(sa)), 2, &S::i) == 0);
+
+    {
+        using IL = std::initializer_list<int>;
+        STATIC_CHECK(ranges::count(IL{0, 1, 2, 1, 3, 1, 4}, 1) == 3);
+        STATIC_CHECK(ranges::count(IL{0, 1, 2, 1, 3, 1, 4}, 5) == 0);
+    }
+
+    return ::test_result();
+}