[core] Put ignore in util namespace

src/mbgl/gl/attribute.hpp

@@ -154,12 +154,12 @@ public:
 
     static std::function<void (std::size_t)> binder(const State& state) {
         return [&state] (std::size_t vertexOffset) {
-            ignore({ (bindAttribute(state.template get<As>().location,
-                                    state.template get<As>().count,
-                                    state.template get<As>().type,
-                                    sizeof(Vertex),
-                                    vertexOffset,
-                                    Vertex::attributeOffsets[Index<As>]), 0)... });
+            util::ignore({ (bindAttribute(state.template get<As>().location,
+                                          state.template get<As>().count,
+                                          state.template get<As>().type,
+                                          sizeof(Vertex),
+                                          vertexOffset,
+                                          Vertex::attributeOffsets[Index<As>]), 0)... });
         };
     }
 };

src/mbgl/gl/index_buffer.hpp

@@ -17,7 +17,7 @@ public:
     template <class... Args>
     void emplace_back(Args&&... args) {
         static_assert(sizeof...(args) == groupSize, "wrong buffer element count");
-        ignore({(v.emplace_back(std::forward<Args>(args)), 0)...});
+        util::ignore({(v.emplace_back(std::forward<Args>(args)), 0)...});
     }
 
     std::size_t indexSize() const { return v.size(); }

src/mbgl/gl/uniform.hpp

@@ -72,7 +72,7 @@ public:
 
     static std::function<void ()> binder(State& state, Values&& values_) {
         return [&state, values = std::move(values_)] () mutable {
-            ignore({ (state.template get<Us>() = values.template get<Us>(), 0)... });
+            util::ignore({ (state.template get<Us>() = values.template get<Us>(), 0)... });
         };
     }
 };

src/mbgl/gl/vertex_buffer.hpp

@@ -19,7 +19,7 @@ public:
     template <class... Args>
     void emplace_back(Args&&... args) {
         static_assert(sizeof...(args) == groupSize, "wrong buffer element count");
-        ignore({(v.emplace_back(std::forward<Args>(args)), 0)...});
+        util::ignore({(v.emplace_back(std::forward<Args>(args)), 0)...});
     }
 
     std::size_t vertexSize() const { return v.size(); }

src/mbgl/util/ignore.hpp

@@ -3,6 +3,7 @@
 #include <initializer_list>
 
 namespace mbgl {
+namespace util {
 
 // Accept any number of parameters of any types, and do nothing with them.
 // Useful for providing a context for parameter pack expansion where a legal
@@ -18,4 +19,5 @@ template <class... Ts> void ignore(Ts&&...) {}
 //
 template <class T> void ignore(const std::initializer_list<T>&) {}
 
+} // namespace util
 } // namespace mbgl