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

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+// Range v3 library
+//
+//  Copyright Eric Niebler 2014-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 <vector>
+#include <sstream>
+#include <cstring>
+#include <utility>
+#include <algorithm>
+#include <range/v3/core.hpp>
+#include <range/v3/algorithm/copy.hpp>
+#include <range/v3/algorithm/equal.hpp>
+#include <range/v3/view/delimit.hpp>
+#include <range/v3/iterator/stream_iterators.hpp>
+
+#include "../array.hpp"
+#include "../simple_test.hpp"
+#include "../test_iterators.hpp"
+
+#if RANGES_CXX_CONSTEXPR >= RANGES_CXX_CONSTEXPR_14 && RANGES_CONSTEXPR_INVOKE
+constexpr /*c++14*/
+bool test_constexpr_copy()
+{
+    int a[4] = {0, 0, 0, 0};
+    int const b[4] = {1, 2, 3, 4};
+    ranges::copy(b, a);
+    return ranges::equal(b, a);
+}
+
+static_assert(test_constexpr_copy(), "");
+#endif
+
+constexpr bool test_constexpr()
+{
+    using IL = std::initializer_list<int>;
+    constexpr test::array<int, 4> input{{0, 1, 2, 3}};
+    test::array<int, 4> tmp{{0, 0, 0, 0}};
+    
+    auto res = ranges::copy(input, ranges::begin(tmp));
+    
+    STATIC_CHECK_RETURN(res.in == ranges::end(input));
+    STATIC_CHECK_RETURN(res.out == ranges::end(tmp));
+    STATIC_CHECK_RETURN(ranges::equal(tmp, IL{0, 1, 2, 3}));
+
+    return true;
+}
+
+int main()
+{
+    using ranges::begin;
+    using ranges::end;
+    using ranges::size;
+
+    std::pair<int, int> const a[] = {{0, 0}, {0, 1}, {1, 2}, {1, 3}, {3, 4}, {3, 5}};
+    static_assert(size(a) == 6, "");
+    std::pair<int, int> out[size(a)] = {};
+
+    auto res = ranges::copy(begin(a), end(a), out);
+    CHECK(res.in == end(a));
+    CHECK(res.out == out + size(out));
+    CHECK(std::equal(a, a + size(a), out));
+
+    std::fill_n(out, size(out), std::make_pair(0, 0));
+    CHECK(!std::equal(a, a + size(a), out));
+
+    res = ranges::copy(a, out);
+    CHECK(res.in == a + size(a));
+    CHECK(res.out == out + size(out));
+    CHECK(std::equal(a, a + size(a), out));
+
+    std::fill_n(out, size(out), std::make_pair(0, 0));
+
+    using ranges::views::delimit;
+    {
+        char const *sz = "hello world";
+        char buf[50];
+        auto str = delimit(sz, '\0');
+        auto res3 = ranges::copy(str, buf);
+        *res3.out = '\0';
+        CHECK(res3.in == std::next(begin(str), static_cast<std::ptrdiff_t>(std::strlen(sz))));
+        CHECK(res3.out == buf + std::strlen(sz));
+        CHECK(std::strcmp(sz, buf) == 0);
+    }
+
+    {
+        char const *sz = "hello world";
+        char buf[50];
+        auto str = delimit(sz, '\0');
+        auto res3 = ranges::copy(std::move(str), buf);
+        *res3.out = '\0';
+        CHECK(!::is_dangling(res3.in));
+        CHECK(res3.out == buf + std::strlen(sz));
+        CHECK(std::strcmp(sz, buf) == 0);
+    }
+
+    {
+        using namespace ranges;
+        std::ostringstream sout;
+        std::vector<int> copy_vec{1,1,1,1,1};
+        copy(copy_vec, ostream_iterator<>(sout, " "));
+        CHECK(sout.str() == "1 1 1 1 1 ");
+    }
+
+    {
+        STATIC_CHECK(test_constexpr());
+    }
+
+    return test_result();
+}