fix pretty printer for recursive types

example.cpp

@@ -11,6 +11,9 @@ signed main() {
   vector<int> pi{3,1,4,1,5,9,2,6};
   dbg(pi);
   dbg(vector<int>{3,1,4,1,5,9,2,6});
-  dbg(pi);
+  dbg(vector<pair<int, int>>{{3,1},{4,1}});
+  dbg(vector<pair<int, vector<string>>>{{3,{"hi"}},{4,{"hello", "world"}}});
+  dbg(set<int>{3,1,4});
+  dbg(map<int, string>{{3,"three"},{1,"one"}});
   cout << "hi\n";
 }

include/bits/prettyprint.hpp

@@ -21,424 +21,430 @@
 #include <utility>
 #include <valarray>
 
-namespace pretty_print
+namespace soi {
+
+template<typename T, typename TChar, typename TCharTraits>
+std::basic_ostream<TChar, TCharTraits> &
+print(std::basic_ostream<TChar, TCharTraits> & stream, const T& x);
+
+namespace detail
 {
-    namespace detail
+// SFINAE type trait to detect whether T::const_iterator exists.
+
+struct sfinae_base
+{
+    using yes = char;
+    using no  = yes[2];
+};
+
+template <typename T>
+struct has_const_iterator : private sfinae_base
+{
+private:
+    template <typename C> static yes & test(typename C::const_iterator*);
+    template <typename C> static no  & test(...);
+public:
+    static const bool value = sizeof(test<T>(nullptr)) == sizeof(yes);
+    using type =  T;
+};
+
+template <typename T>
+struct has_begin_end : private sfinae_base
+{
+private:
+    template <typename C>
+    static yes & f(typename std::enable_if<
+                   std::is_same<decltype(static_cast<typename C::const_iterator(C::*)() const>(&C::begin)),
+                   typename C::const_iterator(C::*)() const>::value>::type *);
+
+    template <typename C> static no & f(...);
+
+    template <typename C>
+    static yes & g(typename std::enable_if<
+                   std::is_same<decltype(static_cast<typename C::const_iterator(C::*)() const>(&C::end)),
+                   typename C::const_iterator(C::*)() const>::value, void>::type*);
+
+    template <typename C> static no & g(...);
+
+public:
+    static bool const beg_value = sizeof(f<T>(nullptr)) == sizeof(yes);
+    static bool const end_value = sizeof(g<T>(nullptr)) == sizeof(yes);
+};
+
+}  // namespace detail
+
+
+// Holds the delimiter values for a specific character type
+
+template <typename TChar>
+struct delimiters_values
+{
+    using char_type = TChar;
+    const char_type * prefix;
+    const char_type * delimiter;
+    const char_type * postfix;
+};
+
+
+// Defines the delimiter values for a specific container and character type
+
+template <typename T, typename TChar>
+struct delimiters
+{
+    using type = delimiters_values<TChar>;
+    static const type values;
+};
+
+
+// Functor to pretty_print containers. You can use this directly if you want
+// to specificy a non-default delimiters type. The pretty_printing logic can
+// be customized by specializing the nested template.
+
+template <typename T,
+          typename TChar = char,
+          typename TCharTraits = ::std::char_traits<TChar>,
+          typename TDelimiters = delimiters<T, TChar>>
+struct pretty_print_container_helper
+{
+    using delimiters_type = TDelimiters;
+    using ostream_type = std::basic_ostream<TChar, TCharTraits>;
+
+    template <typename U>
+    struct pretty_printer
     {
-        // SFINAE type trait to detect whether T::const_iterator exists.
+        static void pretty_print_body(const U & c, ostream_type & stream)
-
-        struct sfinae_base
         {
-            using yes = char;
+            using std::begin;
-            using no  = yes[2];
+            using std::end;
-        };
 
-        template <typename T>
+            auto it = begin(c);
-        struct has_const_iterator : private sfinae_base
+            const auto the_end = end(c);
-        {
-        private:
-            template <typename C> static yes & test(typename C::const_iterator*);
-            template <typename C> static no  & test(...);
-        public:
-            static const bool value = sizeof(test<T>(nullptr)) == sizeof(yes);
-            using type =  T;
-        };
 
-        template <typename T>
+            if (it != the_end)
-        struct has_begin_end : private sfinae_base
-        {
-        private:
-            template <typename C>
-            static yes & f(typename std::enable_if<
-                std::is_same<decltype(static_cast<typename C::const_iterator(C::*)() const>(&C::begin)),
-                             typename C::const_iterator(C::*)() const>::value>::type *);
-
-            template <typename C> static no & f(...);
-
-            template <typename C>
-            static yes & g(typename std::enable_if<
-                std::is_same<decltype(static_cast<typename C::const_iterator(C::*)() const>(&C::end)),
-                             typename C::const_iterator(C::*)() const>::value, void>::type*);
-
-            template <typename C> static no & g(...);
-
-        public:
-            static bool const beg_value = sizeof(f<T>(nullptr)) == sizeof(yes);
-            static bool const end_value = sizeof(g<T>(nullptr)) == sizeof(yes);
-        };
-
-    }  // namespace detail
-
-
-    // Holds the delimiter values for a specific character type
-
-    template <typename TChar>
-    struct delimiters_values
-    {
-        using char_type = TChar;
-        const char_type * prefix;
-        const char_type * delimiter;
-        const char_type * postfix;
-    };
-
-
-    // Defines the delimiter values for a specific container and character type
-
-    template <typename T, typename TChar>
-    struct delimiters
-    {
-        using type = delimiters_values<TChar>;
-        static const type values;
-    };
-
-
-    // Functor to print containers. You can use this directly if you want
-    // to specificy a non-default delimiters type. The printing logic can
-    // be customized by specializing the nested template.
-
-    template <typename T,
-              typename TChar = char,
-              typename TCharTraits = ::std::char_traits<TChar>,
-              typename TDelimiters = delimiters<T, TChar>>
-    struct print_container_helper
-    {
-        using delimiters_type = TDelimiters;
-        using ostream_type = std::basic_ostream<TChar, TCharTraits>;
-
-        template <typename U>
-        struct printer
-        {
-            static void print_body(const U & c, ostream_type & stream)
-            {
-                using std::begin;
-                using std::end;
-
-                auto it = begin(c);
-                const auto the_end = end(c);
-
-                if (it != the_end)
                 {
                     for ( ; ; )
-                    {
+                        {
-                        stream << *it;
+                            ::soi::print(stream, *it);
 
-                    if (++it == the_end) break;
+                            if (++it == the_end) break;
 
-                    if (delimiters_type::values.delimiter != NULL)
+                            if (delimiters_type::values.delimiter != NULL)
-                        stream << delimiters_type::values.delimiter;
+                                ::soi::print(stream, delimiters_type::values.delimiter);
-                    }
+                        }
                 }
-            }
+        }
-        };
+    };
 
-        print_container_helper(const T & container)
+    pretty_print_container_helper(const T & container)
         : container_(container)
-        { }
+    { }
 
-        inline void operator()(ostream_type & stream) const
+    inline void operator()(ostream_type & stream) const
-        {
-            if (delimiters_type::values.prefix != NULL)
-                stream << delimiters_type::values.prefix;
-
-            printer<T>::print_body(container_, stream);
-
-            if (delimiters_type::values.postfix != NULL)
-                stream << delimiters_type::values.postfix;
-        }
-
-    private:
-        const T & container_;
-    };
-
-    // Specialization for pairs
-
-    template <typename T, typename TChar, typename TCharTraits, typename TDelimiters>
-    template <typename T1, typename T2>
-    struct print_container_helper<T, TChar, TCharTraits, TDelimiters>::printer<std::pair<T1, T2>>
     {
-        using ostream_type = typename print_container_helper<T, TChar, TCharTraits, TDelimiters>::ostream_type;
+        if (delimiters_type::values.prefix != NULL)
+            ::soi::print(stream, delimiters_type::values.prefix);
 
-        static void print_body(const std::pair<T1, T2> & c, ostream_type & stream)
+        pretty_printer<T>::pretty_print_body(container_, stream);
-        {
-            stream << c.first;
-            if (print_container_helper<T, TChar, TCharTraits, TDelimiters>::delimiters_type::values.delimiter != NULL)
-                stream << print_container_helper<T, TChar, TCharTraits, TDelimiters>::delimiters_type::values.delimiter;
-            stream << c.second;
-        }
-    };
 
-    // Specialization for tuples
+        if (delimiters_type::values.postfix != NULL)
-
+            ::soi::print(stream, delimiters_type::values.postfix);
-    template <typename T, typename TChar, typename TCharTraits, typename TDelimiters>
-    template <typename ...Args>
-    struct print_container_helper<T, TChar, TCharTraits, TDelimiters>::printer<std::tuple<Args...>>
-    {
-        using ostream_type = typename print_container_helper<T, TChar, TCharTraits, TDelimiters>::ostream_type;
-        using element_type = std::tuple<Args...>;
-
-        template <std::size_t I> struct Int { };
-
-        static void print_body(const element_type & c, ostream_type & stream)
-        {
-            tuple_print(c, stream, Int<0>());
-        }
-
-        static void tuple_print(const element_type &, ostream_type &, Int<sizeof...(Args)>)
-        {
-        }
-
-        static void tuple_print(const element_type & c, ostream_type & stream,
-                                typename std::conditional<sizeof...(Args) != 0, Int<0>, std::nullptr_t>::type)
-        {
-            stream << std::get<0>(c);
-            tuple_print(c, stream, Int<1>());
-        }
-
-        template <std::size_t N>
-        static void tuple_print(const element_type & c, ostream_type & stream, Int<N>)
-        {
-            if (print_container_helper<T, TChar, TCharTraits, TDelimiters>::delimiters_type::values.delimiter != NULL)
-                stream << print_container_helper<T, TChar, TCharTraits, TDelimiters>::delimiters_type::values.delimiter;
-
-            stream << std::get<N>(c);
-
-            tuple_print(c, stream, Int<N + 1>());
-        }
-    };
-
-    // Prints a print_container_helper to the specified stream.
-
-    template<typename T, typename TChar, typename TCharTraits, typename TDelimiters>
-    inline std::basic_ostream<TChar, TCharTraits> & operator<<(
-        std::basic_ostream<TChar, TCharTraits> & stream,
-        const print_container_helper<T, TChar, TCharTraits, TDelimiters> & helper)
-    {
-        helper(stream);
-        return stream;
     }
 
+private:
+    const T & container_;
+};
 
-    // Basic is_container template; specialize to derive from std::true_type for all desired container types
+// Specialization for pairs
 
-    template <typename T>
+template <typename T, typename TChar, typename TCharTraits, typename TDelimiters>
-    struct is_container : public std::integral_constant<bool,
+template <typename T1, typename T2>
-                                                        detail::has_const_iterator<T>::value &&
+struct pretty_print_container_helper<T, TChar, TCharTraits, TDelimiters>::pretty_printer<std::pair<T1, T2>>
-                                                        detail::has_begin_end<T>::beg_value  &&
+{
-                                                        detail::has_begin_end<T>::end_value> { };
+    using ostream_type = typename pretty_print_container_helper<T, TChar, TCharTraits, TDelimiters>::ostream_type;
 
-    template <typename T, std::size_t N>
+    static void pretty_print_body(const std::pair<T1, T2> & c, ostream_type & stream)
-    struct is_container<T[N]> : std::true_type { };
+    {
+        ::soi::print(stream, c.first);
+        if (pretty_print_container_helper<T, TChar, TCharTraits, TDelimiters>::delimiters_type::values.delimiter != NULL)
+            ::soi::print(stream, pretty_print_container_helper<T, TChar, TCharTraits, TDelimiters>::delimiters_type::values.delimiter);
+        ::soi::print(stream, c.second);
+    }
+};
+
+// Specialization for tuples
+
+template <typename T, typename TChar, typename TCharTraits, typename TDelimiters>
+template <typename ...Args>
+struct pretty_print_container_helper<T, TChar, TCharTraits, TDelimiters>::pretty_printer<std::tuple<Args...>>
+{
+    using ostream_type = typename pretty_print_container_helper<T, TChar, TCharTraits, TDelimiters>::ostream_type;
+    using element_type = std::tuple<Args...>;
+
+    template <std::size_t I> struct Int { };
+
+    static void pretty_print_body(const element_type & c, ostream_type & stream)
+    {
+        tuple_pretty_print(c, stream, Int<0>());
+    }
+
+    static void tuple_pretty_print(const element_type &, ostream_type &, Int<sizeof...(Args)>)
+    {
+    }
+
+    static void tuple_pretty_print(const element_type & c, ostream_type & stream,
+                                   typename std::conditional<sizeof...(Args) != 0, Int<0>, std::nullptr_t>::type)
+    {
+        ::soi::print(stream, std::get<0>(c));
+        tuple_pretty_print(c, stream, Int<1>());
+    }
 
     template <std::size_t N>
-    struct is_container<char[N]> : std::false_type { };
+    static void tuple_pretty_print(const element_type & c, ostream_type & stream, Int<N>)
-
-    template <typename T>
-    struct is_container<std::valarray<T>> : std::true_type { };
-
-    template <typename T1, typename T2>
-    struct is_container<std::pair<T1, T2>> : std::true_type { };
-
-    template <typename ...Args>
-    struct is_container<std::tuple<Args...>> : std::true_type { };
-
-
-    // Default delimiters
-
-    template <typename T> struct delimiters<T, char> { static const delimiters_values<char> values; };
-    template <typename T> const delimiters_values<char> delimiters<T, char>::values = { "[", ", ", "]" };
-    template <typename T> struct delimiters<T, wchar_t> { static const delimiters_values<wchar_t> values; };
-    template <typename T> const delimiters_values<wchar_t> delimiters<T, wchar_t>::values = { L"[", L", ", L"]" };
-
-
-    // Delimiters for (multi)set and unordered_(multi)set
-
-    template <typename T, typename TComp, typename TAllocator>
-    struct delimiters< ::std::set<T, TComp, TAllocator>, char> { static const delimiters_values<char> values; };
-
-    template <typename T, typename TComp, typename TAllocator>
-    const delimiters_values<char> delimiters< ::std::set<T, TComp, TAllocator>, char>::values = { "{", ", ", "}" };
-
-    template <typename T, typename TComp, typename TAllocator>
-    struct delimiters< ::std::set<T, TComp, TAllocator>, wchar_t> { static const delimiters_values<wchar_t> values; };
-
-    template <typename T, typename TComp, typename TAllocator>
-    const delimiters_values<wchar_t> delimiters< ::std::set<T, TComp, TAllocator>, wchar_t>::values = { L"{", L", ", L"}" };
-
-    template <typename T, typename TComp, typename TAllocator>
-    struct delimiters< ::std::multiset<T, TComp, TAllocator>, char> { static const delimiters_values<char> values; };
-
-    template <typename T, typename TComp, typename TAllocator>
-    const delimiters_values<char> delimiters< ::std::multiset<T, TComp, TAllocator>, char>::values = { "{", ", ", "}" };
-
-    template <typename T, typename TComp, typename TAllocator>
-    struct delimiters< ::std::multiset<T, TComp, TAllocator>, wchar_t> { static const delimiters_values<wchar_t> values; };
-
-    template <typename T, typename TComp, typename TAllocator>
-    const delimiters_values<wchar_t> delimiters< ::std::multiset<T, TComp, TAllocator>, wchar_t>::values = { L"{", L", ", L"}" };
-
-    template <typename T, typename THash, typename TEqual, typename TAllocator>
-    struct delimiters< ::std::unordered_set<T, THash, TEqual, TAllocator>, char> { static const delimiters_values<char> values; };
-
-    template <typename T, typename THash, typename TEqual, typename TAllocator>
-    const delimiters_values<char> delimiters< ::std::unordered_set<T, THash, TEqual, TAllocator>, char>::values = { "{", ", ", "}" };
-
-    template <typename T, typename THash, typename TEqual, typename TAllocator>
-    struct delimiters< ::std::unordered_set<T, THash, TEqual, TAllocator>, wchar_t> { static const delimiters_values<wchar_t> values; };
-
-    template <typename T, typename THash, typename TEqual, typename TAllocator>
-    const delimiters_values<wchar_t> delimiters< ::std::unordered_set<T, THash, TEqual, TAllocator>, wchar_t>::values = { L"{", L", ", L"}" };
-
-    template <typename T, typename THash, typename TEqual, typename TAllocator>
-    struct delimiters< ::std::unordered_multiset<T, THash, TEqual, TAllocator>, char> { static const delimiters_values<char> values; };
-
-    template <typename T, typename THash, typename TEqual, typename TAllocator>
-    const delimiters_values<char> delimiters< ::std::unordered_multiset<T, THash, TEqual, TAllocator>, char>::values = { "{", ", ", "}" };
-
-    template <typename T, typename THash, typename TEqual, typename TAllocator>
-    struct delimiters< ::std::unordered_multiset<T, THash, TEqual, TAllocator>, wchar_t> { static const delimiters_values<wchar_t> values; };
-
-    template <typename T, typename THash, typename TEqual, typename TAllocator>
-    const delimiters_values<wchar_t> delimiters< ::std::unordered_multiset<T, THash, TEqual, TAllocator>, wchar_t>::values = { L"{", L", ", L"}" };
-
-
-    // Delimiters for pair and tuple
-
-    template <typename T1, typename T2> struct delimiters<std::pair<T1, T2>, char> { static const delimiters_values<char> values; };
-    template <typename T1, typename T2> const delimiters_values<char> delimiters<std::pair<T1, T2>, char>::values = { "(", ", ", ")" };
-    template <typename T1, typename T2> struct delimiters< ::std::pair<T1, T2>, wchar_t> { static const delimiters_values<wchar_t> values; };
-    template <typename T1, typename T2> const delimiters_values<wchar_t> delimiters< ::std::pair<T1, T2>, wchar_t>::values = { L"(", L", ", L")" };
-
-    template <typename ...Args> struct delimiters<std::tuple<Args...>, char> { static const delimiters_values<char> values; };
-    template <typename ...Args> const delimiters_values<char> delimiters<std::tuple<Args...>, char>::values = { "(", ", ", ")" };
-    template <typename ...Args> struct delimiters< ::std::tuple<Args...>, wchar_t> { static const delimiters_values<wchar_t> values; };
-    template <typename ...Args> const delimiters_values<wchar_t> delimiters< ::std::tuple<Args...>, wchar_t>::values = { L"(", L", ", L")" };
-
-
-    // Type-erasing helper class for easy use of custom delimiters.
-    // Requires TCharTraits = std::char_traits<TChar> and TChar = char or wchar_t, and MyDelims needs to be defined for TChar.
-    // Usage: "cout << pretty_print::custom_delims<MyDelims>(x)".
-
-    struct custom_delims_base
     {
-        virtual ~custom_delims_base() { }
+        if (pretty_print_container_helper<T, TChar, TCharTraits, TDelimiters>::delimiters_type::values.delimiter != NULL)
-        virtual std::ostream & stream(::std::ostream &) = 0;
+            ::soi::print(stream, pretty_print_container_helper<T, TChar, TCharTraits, TDelimiters>::delimiters_type::values.delimiter);
-        virtual std::wostream & stream(::std::wostream &) = 0;
-    };
 
-    template <typename T, typename Delims>
+        ::soi::print(stream, std::get<N>(c));
-    struct custom_delims_wrapper : custom_delims_base
+
+        tuple_pretty_print(c, stream, Int<N + 1>());
+    }
+};
+
+// Pretty_Prints a pretty_print_container_helper to the specified stream.
+
+template<typename T, typename TChar, typename TCharTraits, typename TDelimiters>
+inline std::basic_ostream<TChar, TCharTraits> & pretty_print(
+                                                             std::basic_ostream<TChar, TCharTraits> & stream,
+                                                             const pretty_print_container_helper<T, TChar, TCharTraits, TDelimiters> & helper)
+{
+    helper(stream);
+    return stream;
+}
+
+
+// Basic is_container template; specialize to derive from std::true_type for all desired container types
+
+template <typename T>
+struct is_container : public std::integral_constant<bool,
+                                                    detail::has_const_iterator<T>::value &&
+                                                    detail::has_begin_end<T>::beg_value  &&
+                                                    detail::has_begin_end<T>::end_value> { };
+
+template <typename T, std::size_t N>
+struct is_container<T[N]> : std::true_type { };
+
+template <std::size_t N>
+struct is_container<char[N]> : std::false_type { };
+
+template <typename T>
+struct is_container<std::valarray<T>> : std::true_type { };
+
+template <typename T1, typename T2>
+struct is_container<std::pair<T1, T2>> : std::true_type { };
+
+template <typename ...Args>
+struct is_container<std::tuple<Args...>> : std::true_type { };
+
+
+// Default delimiters
+
+template <typename T> struct delimiters<T, char> { static const delimiters_values<char> values; };
+template <typename T> const delimiters_values<char> delimiters<T, char>::values = { "[", ", ", "]" };
+template <typename T> struct delimiters<T, wchar_t> { static const delimiters_values<wchar_t> values; };
+template <typename T> const delimiters_values<wchar_t> delimiters<T, wchar_t>::values = { L"[", L", ", L"]" };
+
+
+// Delimiters for (multi)set and unordered_(multi)set
+
+template <typename T, typename TComp, typename TAllocator>
+struct delimiters< ::std::set<T, TComp, TAllocator>, char> { static const delimiters_values<char> values; };
+
+template <typename T, typename TComp, typename TAllocator>
+const delimiters_values<char> delimiters< ::std::set<T, TComp, TAllocator>, char>::values = { "{", ", ", "}" };
+
+template <typename T, typename TComp, typename TAllocator>
+struct delimiters< ::std::set<T, TComp, TAllocator>, wchar_t> { static const delimiters_values<wchar_t> values; };
+
+template <typename T, typename TComp, typename TAllocator>
+const delimiters_values<wchar_t> delimiters< ::std::set<T, TComp, TAllocator>, wchar_t>::values = { L"{", L", ", L"}" };
+
+template <typename T, typename TComp, typename TAllocator>
+struct delimiters< ::std::multiset<T, TComp, TAllocator>, char> { static const delimiters_values<char> values; };
+
+template <typename T, typename TComp, typename TAllocator>
+const delimiters_values<char> delimiters< ::std::multiset<T, TComp, TAllocator>, char>::values = { "{", ", ", "}" };
+
+template <typename T, typename TComp, typename TAllocator>
+struct delimiters< ::std::multiset<T, TComp, TAllocator>, wchar_t> { static const delimiters_values<wchar_t> values; };
+
+template <typename T, typename TComp, typename TAllocator>
+const delimiters_values<wchar_t> delimiters< ::std::multiset<T, TComp, TAllocator>, wchar_t>::values = { L"{", L", ", L"}" };
+
+template <typename T, typename THash, typename TEqual, typename TAllocator>
+struct delimiters< ::std::unordered_set<T, THash, TEqual, TAllocator>, char> { static const delimiters_values<char> values; };
+
+template <typename T, typename THash, typename TEqual, typename TAllocator>
+const delimiters_values<char> delimiters< ::std::unordered_set<T, THash, TEqual, TAllocator>, char>::values = { "{", ", ", "}" };
+
+template <typename T, typename THash, typename TEqual, typename TAllocator>
+struct delimiters< ::std::unordered_set<T, THash, TEqual, TAllocator>, wchar_t> { static const delimiters_values<wchar_t> values; };
+
+template <typename T, typename THash, typename TEqual, typename TAllocator>
+const delimiters_values<wchar_t> delimiters< ::std::unordered_set<T, THash, TEqual, TAllocator>, wchar_t>::values = { L"{", L", ", L"}" };
+
+template <typename T, typename THash, typename TEqual, typename TAllocator>
+struct delimiters< ::std::unordered_multiset<T, THash, TEqual, TAllocator>, char> { static const delimiters_values<char> values; };
+
+template <typename T, typename THash, typename TEqual, typename TAllocator>
+const delimiters_values<char> delimiters< ::std::unordered_multiset<T, THash, TEqual, TAllocator>, char>::values = { "{", ", ", "}" };
+
+template <typename T, typename THash, typename TEqual, typename TAllocator>
+struct delimiters< ::std::unordered_multiset<T, THash, TEqual, TAllocator>, wchar_t> { static const delimiters_values<wchar_t> values; };
+
+template <typename T, typename THash, typename TEqual, typename TAllocator>
+const delimiters_values<wchar_t> delimiters< ::std::unordered_multiset<T, THash, TEqual, TAllocator>, wchar_t>::values = { L"{", L", ", L"}" };
+
+
+// Delimiters for pair and tuple
+
+template <typename T1, typename T2> struct delimiters<std::pair<T1, T2>, char> { static const delimiters_values<char> values; };
+template <typename T1, typename T2> const delimiters_values<char> delimiters<std::pair<T1, T2>, char>::values = { "(", ", ", ")" };
+template <typename T1, typename T2> struct delimiters< ::std::pair<T1, T2>, wchar_t> { static const delimiters_values<wchar_t> values; };
+template <typename T1, typename T2> const delimiters_values<wchar_t> delimiters< ::std::pair<T1, T2>, wchar_t>::values = { L"(", L", ", L")" };
+
+template <typename ...Args> struct delimiters<std::tuple<Args...>, char> { static const delimiters_values<char> values; };
+template <typename ...Args> const delimiters_values<char> delimiters<std::tuple<Args...>, char>::values = { "(", ", ", ")" };
+template <typename ...Args> struct delimiters< ::std::tuple<Args...>, wchar_t> { static const delimiters_values<wchar_t> values; };
+template <typename ...Args> const delimiters_values<wchar_t> delimiters< ::std::tuple<Args...>, wchar_t>::values = { L"(", L", ", L")" };
+
+
+// Type-erasing helper class for easy use of custom delimiters.
+// Requires TCharTraits = std::char_traits<TChar> and TChar = char or wchar_t, and MyDelims needs to be defined for TChar.
+// Usage: "cout << pretty_pretty_print::custom_delims<MyDelims>(x)".
+
+struct custom_delims_base
+{
+    virtual ~custom_delims_base() { }
+    virtual std::ostream & stream(::std::ostream &) = 0;
+    virtual std::wostream & stream(::std::wostream &) = 0;
+};
+
+template <typename T, typename Delims>
+struct custom_delims_wrapper : custom_delims_base
+{
+    custom_delims_wrapper(const T & t_) : t(t_) { }
+
+    std::ostream & stream(std::ostream & s)
     {
-        custom_delims_wrapper(const T & t_) : t(t_) { }
+        return pretty_print(s, pretty_print_container_helper<T, char, std::char_traits<char>, Delims>(t));
-
-        std::ostream & stream(std::ostream & s)
-        {
-            return s << print_container_helper<T, char, std::char_traits<char>, Delims>(t);
-        }
-
-        std::wostream & stream(std::wostream & s)
-        {
-            return s << print_container_helper<T, wchar_t, std::char_traits<wchar_t>, Delims>(t);
-        }
-
-    private:
-        const T & t;
-    };
-
-    template <typename Delims>
-    struct custom_delims
-    {
-        template <typename Container>
-        custom_delims(const Container & c) : base(new custom_delims_wrapper<Container, Delims>(c)) { }
-
-        std::unique_ptr<custom_delims_base> base;
-    };
-
-    template <typename TChar, typename TCharTraits, typename Delims>
-    inline std::basic_ostream<TChar, TCharTraits> & operator<<(std::basic_ostream<TChar, TCharTraits> & s, const custom_delims<Delims> & p)
-    {
-        return p.base->stream(s);
     }
 
-
+    std::wostream & stream(std::wostream & s)
-    // A wrapper for a C-style array given as pointer-plus-size.
-    // Usage: std::cout << pretty_print_array(arr, n) << std::endl;
-
-    template<typename T>
-    struct array_wrapper_n
     {
-        typedef const T * const_iterator;
+        return pretty_print(s, pretty_print_container_helper<T, wchar_t, std::char_traits<wchar_t>, Delims>(t));
-        typedef T value_type;
+    }
 
-        array_wrapper_n(const T * const a, size_t n) : _array(a), _n(n) { }
+private:
-        inline const_iterator begin() const { return _array; }
+    const T & t;
-        inline const_iterator end() const { return _array + _n; }
+};
 
-    private:
+template <typename Delims>
-        const T * const _array;
+struct custom_delims
-        size_t _n;
+{
-    };
+    template <typename Container>
+    custom_delims(const Container & c) : base(new custom_delims_wrapper<Container, Delims>(c)) { }
+
+    std::unique_ptr<custom_delims_base> base;
+};
+
+template <typename TChar, typename TCharTraits, typename Delims>
+inline std::basic_ostream<TChar, TCharTraits> & pretty_print(std::basic_ostream<TChar, TCharTraits> & s, const custom_delims<Delims> & p)
+{
+    return p.base->stream(s);
+}
 
 
-    // A wrapper for hash-table based containers that offer local iterators to each bucket.
+// A wrapper for a C-style array given as pointer-plus-size.
-    // Usage: std::cout << bucket_print(m, 4) << std::endl;  (Prints bucket 5 of container m.)
+// Usage: std::cout << pretty_pretty_print_array(arr, n) << std::endl;
 
-    template <typename T>
+template<typename T>
-    struct bucket_print_wrapper
+struct array_wrapper_n
+{
+    typedef const T * const_iterator;
+    typedef T value_type;
+
+    array_wrapper_n(const T * const a, size_t n) : _array(a), _n(n) { }
+    inline const_iterator begin() const { return _array; }
+    inline const_iterator end() const { return _array + _n; }
+
+private:
+    const T * const _array;
+    size_t _n;
+};
+
+
+// A wrapper for hash-table based containers that offer local iterators to each bucket.
+// Usage: std::cout << bucket_pretty_print(m, 4) << std::endl;  (Pretty_Prints bucket 5 of container m.)
+
+template <typename T>
+struct bucket_pretty_print_wrapper
+{
+    typedef typename T::const_local_iterator const_iterator;
+    typedef typename T::size_type size_type;
+
+    const_iterator begin() const
     {
-        typedef typename T::const_local_iterator const_iterator;
+        return m_map.cbegin(n);
-        typedef typename T::size_type size_type;
+    }
 
-        const_iterator begin() const
+    const_iterator end() const
-        {
+    {
-            return m_map.cbegin(n);
+        return m_map.cend(n);
-        }
+    }
 
-        const_iterator end() const
+    bucket_pretty_print_wrapper(const T & m, size_type bucket) : m_map(m), n(bucket) { }
-        {
-            return m_map.cend(n);
-        }
 
-        bucket_print_wrapper(const T & m, size_type bucket) : m_map(m), n(bucket) { }
+private:
+    const T & m_map;
+    const size_type n;
+};
 
-    private:
+}   // namespace soi
-        const T & m_map;
-        const size_type n;
-    };
-
-}   // namespace pretty_print
 
 
 /*
 // Global accessor functions for the convenience wrappers
 
 template<typename T>
-inline pretty_print::array_wrapper_n<T> pretty_print_array(const T * const a, size_t n)
+inline pretty_pretty_print::array_wrapper_n<T> pretty_pretty_print_array(const T * const a, size_t n)
 {
-    return pretty_print::array_wrapper_n<T>(a, n);
+return pretty_pretty_print::array_wrapper_n<T>(a, n);
 }
 
-template <typename T> pretty_print::bucket_print_wrapper<T>
+template <typename T> pretty_pretty_print::bucket_pretty_print_wrapper<T>
-bucket_print(const T & m, typename T::size_type n)
+bucket_pretty_print(const T & m, typename T::size_type n)
 {
-    return pretty_print::bucket_print_wrapper<T>(m, n);
+return pretty_pretty_print::bucket_pretty_print_wrapper<T>(m, n);
 }
 
 
 // Main magic entry point: An overload snuck into namespace std.
 // Can we do better?
 
-namespace std
-{
-    // Prints a container to the stream using default delimiters
-
-    template<typename T, typename TChar, typename TCharTraits>
-    inline typename enable_if< ::pretty_print::is_container<T>::value,
-                              basic_ostream<TChar, TCharTraits> &>::type
-    operator<<(basic_ostream<TChar, TCharTraits> & stream, const T & container)
-    {
-        return stream << ::pretty_print::print_container_helper<T, TChar, TCharTraits>(container);
-    }
-}
 */
 
-#endif  // SOI_PRETTY_PRINT
+namespace soi
+{
+// Pretty_Prints a container to the stream using default delimiters
+
+template<typename T, typename TChar, typename TCharTraits>
+inline typename std::enable_if< ::soi::is_container<T>::value,
+                                std::basic_ostream<TChar, TCharTraits> &>::type
+pretty_print(std::basic_ostream<TChar, TCharTraits> & stream, const T & container)
+{
+    return ::soi::print(stream, ::soi::pretty_print_container_helper<T, TChar, TCharTraits>(container));
+}
+}
+
+
+#endif  // SOI_PRETTY_PRETTY_PRINT

include/bits/soi-dbg.hpp

@@ -23,7 +23,7 @@
 
 #include "soi-pretty.hpp"
 
-namespace soi_h {
+namespace soi {
 
 namespace detail {
 
@@ -102,7 +102,7 @@ CONSTEXPR14_TN
 static_string
 type_name()
 {
-  const int k = sizeof("constexpr soi_h::detail:: T =")/sizeof(char);
+  const int k = sizeof("constexpr soi::detail:: T")/sizeof(char);
 #ifdef __clang__
     static_string p = __PRETTY_FUNCTION__;
     return static_string(p.data() + 31 + k, p.size() - 31 - k - 1);
@@ -215,7 +215,7 @@ T&& dbg_print(T&& value,
               char const* expression) {
   const T& ref = value;
   std::stringstream value_buffer; // avoid nesting of dbg macros within print functinos
-  soi_h::pretty_print(value_buffer, ref);
+  soi::print(value_buffer, ref);
 
   std::cerr << ANSI_DEBUG
             << "[" << file << ":" << line
@@ -257,8 +257,8 @@ T&& identity(T&& t) {
 #define dbg(...) dbg_macro::identity(__VA_ARGS__)
 #else
 #define dbg(...)                                                        \
-  soi_h::detail::dbg_print((__VA_ARGS__),                               \
+  soi::detail::dbg_print((__VA_ARGS__),                               \
-                           soi_h::detail::sanitized_type_name<decltype(__VA_ARGS__)>(), \
+                           soi::detail::sanitized_type_name<decltype(__VA_ARGS__)>(), \
                            __FILE__,                                    \
                            __LINE__,                                    \
                            __func__,                                    \

include/bits/soi-pretty.hpp

@@ -3,7 +3,7 @@
 //    (See accompanying file LICENSE_1_0.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
 //
-// pretty printing with c++
+// pretty pretty_printing with c++
 //
 
 #ifndef SOI_PRETTY
@@ -11,14 +11,7 @@
 
 #include "prettyprint.hpp"
 
-namespace soi_h {
+namespace soi {
-
-template<typename T, typename TChar, typename TCharTraits>
-inline typename std::enable_if< ::pretty_print::is_container<T>::value,
-                                std::basic_ostream<TChar, TCharTraits> &>::type
-pretty_print(std::basic_ostream<TChar, TCharTraits> & stream, const T & container) {
-  return stream << ::pretty_print::print_container_helper<T, TChar, TCharTraits>(container);
-}
 
 template<typename TChar, typename TCharTraits>
 std::basic_ostream<TChar, TCharTraits> &
@@ -65,12 +58,18 @@ pretty_print(std::basic_ostream<TChar, TCharTraits> & stream, char c) {
 }
 
 template<typename T, typename TChar, typename TCharTraits>
-inline typename std::enable_if< !::pretty_print::is_container<T>::value,
+inline typename std::enable_if< !::soi::is_container<T>::value,
                                 std::basic_ostream<TChar, TCharTraits> &>::type
 pretty_print(std::basic_ostream<TChar, TCharTraits> & stream, const T& x) {
   return stream << x;
 }
 
+
+template<typename T, typename TChar, typename TCharTraits>
+std::basic_ostream<TChar, TCharTraits> &
+print(std::basic_ostream<TChar, TCharTraits> & stream, const T& x) {
+  return pretty_print(stream, x);
+}
 }
 
 #endif // SOI_PRETTY

include/soi

@@ -8,7 +8,7 @@
 #include <fstream>
 #include "bits/soi-dbg.hpp"
 
-namespace soi_h {
+namespace soi {
 
 void check_for_eof() {
     if (!(std::cin >> std::ws).eof())
@@ -52,11 +52,11 @@ void initialize_debug() {
       std::atexit(noninteractive_check_eof) != 0) {
     std::cerr << "WARNING: soi.h -- registration of sanity check at exit failed\n";
   }
-  soi_h::detail::dbg_init();
+  soi::detail::dbg_init();
 }
 
-struct soi_h_initializer {
+struct soi_initializer {
-  soi_h_initializer(bool release) {
+  soi_initializer(bool release) {
     if (release) {
       std::ios::sync_with_stdio(false);
       std::cin.tie(0);
@@ -67,12 +67,12 @@ struct soi_h_initializer {
 };
 
 #ifdef SOI_RELEASE
-soi_h_initializer soi_h_initializer_{true};
+soi_initializer soi_initializer_{true};
 #else
-soi_h_initializer soi_h_initializer_{false};
+soi_initializer soi_initializer_{false};
 #endif
 
-} // end namespace soi_h
+} // end namespace soi
 
 #include "bits/soi-deprecate.hpp"