diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/mbgl/text/types.hpp | 7 | ||||
-rw-r--r-- | include/mbgl/util/optional.hpp | 69 | ||||
-rw-r--r-- | include/mbgl/util/variant.hpp | 20 |
3 files changed, 77 insertions, 19 deletions
diff --git a/include/mbgl/text/types.hpp b/include/mbgl/text/types.hpp index dbb483ea8f..1d21ded2a5 100644 --- a/include/mbgl/text/types.hpp +++ b/include/mbgl/text/types.hpp @@ -3,11 +3,10 @@ #include <mbgl/util/vec.hpp> #include <mbgl/util/rect.hpp> +#include <mbgl/util/optional.hpp> #include <array> #include <vector> -#include <boost/optional.hpp> - namespace mbgl { typedef vec2<float> CollisionPoint; @@ -53,7 +52,7 @@ struct GlyphBox { float minScale = 0.0f; float maxScale = std::numeric_limits<float>::infinity(); float padding = 0.0f; - boost::optional<CollisionRect> hBox; + mapbox::util::optional<CollisionRect> hBox; }; typedef std::vector<GlyphBox> GlyphBoxes; @@ -88,7 +87,7 @@ typedef std::vector<PlacedGlyph> PlacedGlyphs; struct PlacementBox { CollisionAnchor anchor; CollisionRect box; - boost::optional<CollisionRect> hBox; + mapbox::util::optional<CollisionRect> hBox; PlacementRange placementRange = {{0.0f, 0.0f}}; float placementScale = 0.0f; float maxScale = std::numeric_limits<float>::infinity(); diff --git a/include/mbgl/util/optional.hpp b/include/mbgl/util/optional.hpp new file mode 100644 index 0000000000..133e2c8f97 --- /dev/null +++ b/include/mbgl/util/optional.hpp @@ -0,0 +1,69 @@ +#ifndef MAPBOX_UTIL_OPTIONAL_HPP +#define MAPBOX_UTIL_OPTIONAL_HPP + +#include <type_traits> + +#include "variant.hpp" + +namespace mapbox +{ +namespace util +{ + +template <typename T> class optional +{ + static_assert(!std::is_reference<T>::value, "optional doesn't support references"); + + struct none_type + { + }; + + variant<none_type, T> variant_; + + public: + optional() = default; + + optional(optional const &rhs) + { + if (this != &rhs) + { // protect against invalid self-assignment + variant_ = rhs.variant_; + } + } + + optional(T const &v) { variant_ = v; } + + explicit operator bool() const noexcept { return variant_.template is<T>(); } + + T const &get() const { return variant_.template get<T>(); } + T &get() { return variant_.template get<T>(); } + + T const &operator*() const { return this->get(); } + T operator*() { return this->get(); } + + optional &operator=(T const &v) + { + variant_ = v; + return *this; + } + + optional &operator=(optional const &rhs) + { + if (this != &rhs) + { + variant_ = rhs.variant_; + } + return *this; + } + + template <typename... Args> void emplace(Args &&... args) + { + variant_ = T{std::forward<Args>(args)...}; + } + + void reset() { variant_ = none_type{}; } +}; +} +} + +#endif diff --git a/include/mbgl/util/variant.hpp b/include/mbgl/util/variant.hpp index 1eca5160c7..3b5659425a 100644 --- a/include/mbgl/util/variant.hpp +++ b/include/mbgl/util/variant.hpp @@ -4,7 +4,6 @@ #include <utility> #include <typeinfo> #include <type_traits> -#include <algorithm> // std::move/swap #include <stdexcept> // runtime_error #include <new> // operator new #include <cstddef> // size_t @@ -515,22 +514,13 @@ public: VARIANT_INLINE variant(no_init) : type_index(detail::invalid_value) {} + // http://isocpp.org/blog/2012/11/universal-references-in-c11-scott-meyers template <typename T, class = typename std::enable_if< - detail::is_valid_type<T, Types...>::value>::type> - VARIANT_INLINE explicit variant(T const& val) noexcept - : type_index(detail::value_traits<T, Types...>::index) - { - constexpr std::size_t index = sizeof...(Types) - detail::value_traits<T, Types...>::index - 1; - using target_type = typename detail::select_type<index, Types...>::type; - new (&data) target_type(val); - } - - template <typename T, class = typename std::enable_if< - detail::is_valid_type<T, Types...>::value>::type> + detail::is_valid_type<typename std::remove_reference<T>::type, Types...>::value>::type> VARIANT_INLINE variant(T && val) noexcept - : type_index(detail::value_traits<T, Types...>::index) + : type_index(detail::value_traits<typename std::remove_reference<T>::type, Types...>::index) { - constexpr std::size_t index = sizeof...(Types) - detail::value_traits<T, Types...>::index - 1; + constexpr std::size_t index = sizeof...(Types) - detail::value_traits<typename std::remove_reference<T>::type, Types...>::index - 1; using target_type = typename detail::select_type<index, Types...>::type; new (&data) target_type(std::forward<T>(val)); // nothrow } @@ -565,7 +555,7 @@ public: template <typename T> VARIANT_INLINE variant<Types...>& operator=(T && rhs) noexcept { - variant<Types...> temp(std::move(rhs)); + variant<Types...> temp(std::forward<T>(rhs)); swap(*this, temp); return *this; } |