init

Telegram/ThirdParty/range-v3/test_package/example.cpp

@@ -0,0 +1,43 @@
+// Range v3 library
+//
+//  Copyright Eric Niebler 2013-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)
+//
+
+
+#include <range/v3/all.hpp>
+#include <iostream>
+
+using namespace ranges;
+
+// A range that iterates over all the characters in a
+// null-terminated string.
+class c_string_range
+  : public view_facade<c_string_range>
+{
+    friend range_access;
+    char const * sz_;
+    char const & read() const { return *sz_; }
+    bool equal(default_sentinel_t) const { return *sz_ == '\0'; }
+    void next() { ++sz_; }
+public:
+    c_string_range() = default;
+    explicit c_string_range(char const *sz) : sz_(sz)
+    {
+        assert(sz != nullptr);
+    }
+};
+
+int main()
+{
+    c_string_range r("hello world");
+    // Iterate over all the characters and print them out
+    ranges::for_each(r, [](char ch){
+        std::cout << ch << ' ';
+    });
+    // prints: h e l l o   w o r l d
+}