Use CTTI instead of RTTI where possible

include/cereal/cereal.hpp

@@ -45,6 +45,8 @@
 #include "cereal/details/helpers.hpp"
 #include "cereal/types/base_class.hpp"
 
+#include "cereal/external/ctti/type_id.hpp"
+
 namespace cereal
 {
   // ######################################################################
@@ -269,8 +271,9 @@ namespace cereal
     {                                                                            \
       static std::uint32_t registerVersion()                                     \
       {                                                                          \
-        ::cereal::detail::StaticObject<Versions>::getInstance().mapping.emplace( \
-             std::type_index(typeid(TYPE)).hash_code(), VERSION_NUMBER );        \
+        ::cereal::detail::StaticObject<Versions>::getInstance().mapping          \
+            .emplace(std::hash<ctti::type_id_t>()(ctti::type_id<TYPE>()),        \
+                     VERSION_NUMBER);                                            \
         return VERSION_NUMBER;                                                   \
       }                                                                          \
       static inline const std::uint32_t version = registerVersion();             \
@@ -285,8 +288,9 @@ namespace cereal
       static const std::uint32_t version;                                        \
       static std::uint32_t registerVersion()                                     \
       {                                                                          \
-        ::cereal::detail::StaticObject<Versions>::getInstance().mapping.emplace( \
-             std::type_index(typeid(TYPE)).hash_code(), VERSION_NUMBER );        \
+        ::cereal::detail::StaticObject<Versions>::getInstance().mapping          \
+            .emplace(std::hash<ctti::type_id_t>()(ctti::type_id<TYPE>()),        \
+                     VERSION_NUMBER);                                            \
         return VERSION_NUMBER;                                                   \
       }                                                                          \
       CEREAL_UNUSED_FUNCTION                                                     \
@@ -595,7 +599,7 @@ namespace cereal
       template <class T> inline
       std::uint32_t registerClassVersion()
       {
-        static const auto hash = std::type_index(typeid(T)).hash_code();
+        static const auto hash = std::hash<ctti::type_id_t>()(ctti::type_id<T>());
         const auto insertResult = itsVersionedTypes.insert( hash );
         const auto lock = detail::StaticObject<detail::Versions>::lock();
         const auto version =
@@ -1013,7 +1017,7 @@ namespace cereal
       template <class T> inline
       std::uint32_t loadClassVersion()
       {
-        static const auto hash = std::type_index(typeid(T)).hash_code();
+        static const auto hash = std::hash<ctti::type_id_t>()(ctti::type_id<T>());
         auto lookupResult = itsVersionedTypes.find( hash );
 
         if( lookupResult != itsVersionedTypes.end() ) // already exists

include/cereal/details/traits.hpp

@@ -42,6 +42,8 @@
 #include "cereal/macros.hpp"
 #include "cereal/access.hpp"
 
+#include "cereal/external/ctti/type_id.hpp"
+
 namespace cereal
 {
   namespace traits
@@ -1146,15 +1148,15 @@ namespace cereal
       {
         template<class T>
           base_class_id(T const * const t) :
-          type(typeid(T)),
+          type(ctti::type_id<T>()),
           ptr(t),
-          hash(std::hash<std::type_index>()(typeid(T)) ^ (std::hash<void const *>()(t) << 1))
+          hash(std::hash<ctti::type_id_t>()(ctti::type_id<T>()) ^ (std::hash<void const *>()(t) << 1))
           { }
 
           bool operator==(base_class_id const & other) const
           { return (type == other.type) && (ptr == other.ptr); }
 
-          std::type_index type;
+          ctti::type_id_t type;
           void const * ptr;
           size_t hash;
       };

include/cereal/external/ctti/LICENSE.md

@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) 2015 Manuel Sánchez
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

include/cereal/external/ctti/detail/algorithm.hpp

@@ -0,0 +1,47 @@
+#ifndef CTTI_DETAIL_ALGORITHM_HPP
+#define CTTI_DETAIL_ALGORITHM_HPP
+
+#include <cstdint>
+
+namespace ctti
+{
+
+namespace detail
+{
+
+template<typename T, std::size_t N>
+constexpr const T* begin(const T(&array)[N])
+{
+    return &array[0];
+}
+
+template<typename T, std::size_t N>
+constexpr const T* end(const T(&array)[N])
+{
+    return &array[N];
+}
+
+template<typename LhsIt, typename RhsIt>
+constexpr bool equal_range(LhsIt lhsBegin, LhsIt lhsEnd, RhsIt rhsBegin, RhsIt rhsEnd)
+{
+    return (lhsBegin != lhsEnd && rhsBegin != rhsEnd) ? *lhsBegin == *rhsBegin &&
+        equal_range(lhsBegin + 1, lhsEnd, rhsBegin + 1, rhsEnd) : (lhsBegin == lhsEnd && rhsBegin == rhsEnd);
+}
+
+template<typename T>
+constexpr const T& max(const T& lhs, const T& rhs)
+{
+    return (lhs >= rhs) ? lhs : rhs;
+}
+
+template<typename T>
+constexpr const T& min(const T& lhs, const T& rhs)
+{
+    return (lhs <= rhs) ? lhs : rhs;
+}
+
+}
+
+}
+
+#endif // CTTI_DETAIL_ALGORITHM_HPP

include/cereal/external/ctti/detail/cstring.hpp

@@ -0,0 +1,125 @@
+#ifndef CTTI_DETAIL_CSTRING_HPP
+#define CTTI_DETAIL_CSTRING_HPP
+
+#include "hash.hpp"
+#include "algorithm.hpp"
+#include <ostream>
+#include <string>
+
+namespace ctti
+{
+
+namespace detail
+{
+
+class cstring
+{
+public:
+    template<std::size_t N>
+    constexpr cstring(const char (&str)[N]) :
+        cstring{&str[0], N - 1}
+    {}
+
+    constexpr cstring(const char* begin, std::size_t length) :
+        _str{begin},
+        _length{length}
+    {}
+
+    constexpr cstring(const char* begin, const char* end) :
+        cstring{begin, static_cast<std::size_t>(end - begin)}
+    {}
+
+    constexpr cstring(const char* begin) :
+        cstring{begin, length(begin)}
+    {}
+
+    static constexpr std::size_t length(const char* str)
+    {
+        return *str ? 1 + length(str + 1) : 0;
+    }
+
+    constexpr std::size_t length() const
+    {
+        return _length;
+    }
+
+    constexpr std::size_t size() const
+    {
+        return length();
+    }
+
+    constexpr hash_t hash() const
+    {
+        return fnv1a_hash(length(), begin());
+    }
+
+    std::string cppstring() const
+    {
+        return {begin(), end()};
+    }
+
+    std::string str() const
+    {
+        return cppstring();
+    }
+
+    constexpr const char* begin() const
+    {
+        return _str;
+    }
+
+    constexpr const char* end() const
+    {
+        return _str + _length;
+    }
+
+    constexpr char operator[](std::size_t i) const
+    {
+        return _str[i];
+    }
+
+    constexpr const char* operator()(std::size_t i) const
+    {
+        return _str + i;
+    }
+
+    constexpr cstring operator()(std::size_t begin, std::size_t end) const
+    {
+        return {_str + begin, _str + end};
+    }
+
+    constexpr cstring pad(std::size_t begin_offset, std::size_t end_offset) const
+    {
+        return operator()(begin_offset, size() - end_offset);
+    }
+
+    friend std::ostream& operator<<(std::ostream& os, const cstring& str)
+    {
+        for(const char c : str)
+        {
+            os << c;
+        }
+
+        return os;
+    }
+
+private:
+    const char* _str;
+    std::size_t _length;
+};
+
+constexpr bool operator==(const cstring& lhs, const cstring& rhs)
+{
+    return ctti::detail::equal_range(lhs.begin(), lhs.end(), rhs.begin(), rhs.end());
+}
+
+constexpr bool operator!=(const cstring& lhs, const cstring& rhs)
+{
+    return !(lhs == rhs);
+}
+
+}
+
+}
+
+#endif // CTTI_DETAIL_CSTRING_HPP

include/cereal/external/ctti/detail/entity_name.hpp

@@ -0,0 +1,46 @@
+#ifndef CTTI_DETAIL_ENTITY_NAME_HPP
+#define CTTI_DETAIL_ENTITY_NAME_HPP
+
+#include "cstring.hpp"
+
+namespace ctti
+{
+
+namespace detail
+{
+
+class entity_name
+{
+public:
+    constexpr entity_name(const ctti::detail::cstring& str) :
+        _str{str}
+    {}
+
+    constexpr ctti::detail::cstring str() const
+    {
+        return _str;
+    }
+
+    constexpr ctti::detail::cstring operator[](std::size_t i) const
+    {
+        return colon_scan(_str.begin(), _str.end(), i);
+    }
+
+private:
+    ctti::detail::cstring _str;
+
+    constexpr ctti::detail::cstring colon_scan(const char* begin, const char* end, std::size_t i) const
+    {
+        return (begin == end) ? {begin, end} :
+            (i == 0) ? {begin, end}
+            (colon_count == 0 && *begin == ':') ? colon_scan(++begin, end, i, ++colon_count) :
+            (colon_count == 1 && *begin == ':') ? colon_scan(++begin, end, i - 1, 0)
+            (
+    }
+};
+
+}
+
+}
+
+#endif // CTTI_DETAIL_ENTITY_NAME_HPP

include/cereal/external/ctti/detail/hash.hpp

@@ -0,0 +1,32 @@
+#ifndef CTTI_DETAIL_HASH_HPP
+#define CTTI_DETAIL_HASH_HPP
+
+#include <cstdint>
+
+namespace ctti
+{
+    namespace detail
+    {
+        // From https://github.com/foonathan/string_id. As usually, thanks Jonathan.
+
+        using hash_t = std::uint64_t;
+
+        // See http://www.isthe.com/chongo/tech/comp/fnv/#FNV-param
+        constexpr hash_t fnv_basis = 14695981039346656037ull;
+        constexpr hash_t fnv_prime = 1099511628211ull;
+
+        // FNV-1a 64 bit hash
+        constexpr hash_t fnv1a_hash(std::size_t n, const char *str, hash_t hash = fnv_basis)
+        {
+            return n > 0 ? fnv1a_hash(n - 1, str + 1, (hash ^ *str) * fnv_prime) : hash;
+        }
+
+        template<std::size_t N>
+        constexpr hash_t fnv1a_hash(const char (&array)[N])
+        {
+            return fnv1a_hash(N - 1, &array[0]);
+        }
+    }
+}
+
+#endif /* CTTI_DETAIL_HASH_HPP */

include/cereal/external/ctti/detail/language_features.hpp

@@ -0,0 +1,18 @@
+#ifndef CTTI_LANGUAGE_FEATURES_HPP
+#define CTTI_LANGUAGE_FEATURES_HPP
+
+#ifdef __cpp_variable_templates
+#define CTTI_HAS_VARIABLE_TEMPLATES
+#endif // __cpp_variable_templates
+
+#define CTTI_HAS_CONSTEXPR_PRETTY_FUNCTION
+
+#if defined(__GCC__) && __GCC__ < 5
+#undef CTTI_HAS_CONSTEXPR_PRETTY_FUNCTION
+#endif // GCC 4.x
+
+#ifdef __clang__
+#define CTTI_HAS_ENUM_AWARE_PRETTY_FUNCTION
+#endif // __clang__
+
+#endif // CTTI_LANGUAGE_FEATURES_HPP