WIP

slsDetectorSoftware/include/Result.h

@@ -31,7 +31,6 @@ template <class T, class Allocator = std::allocator<T>> class Result {
     Result() = default;
     Result(std::initializer_list<T> list) : vec(list){};
 
-
     /** Custom constructor from integer type to Result<ns> or Result<bool> */
     template <typename V, typename = typename std::enable_if<
                               std::is_integral<V>::value &&
@@ -98,9 +97,14 @@ template <class T, class Allocator = std::allocator<T>> class Result {
         vec.push_back(std::forward<V>(value));
     }
 
+    /** Disable emplace_back if the underlying vector does not support it
+     * vector<bool> gcc 4.8
+     */
     template <typename... Args>
-    auto emplace_back(Args &&... args) -> decltype(vec.emplace_back(args...)){
-        vec.emplace_back(std::forward<Args>(args)...);
+    auto emplace_back(Args &&... args) ->
+        typename std::enable_if<has_emplace_back<std::vector<T>>::value,
+                                decltype(vec.emplace_back(args...))>::type {
+        return vec.emplace_back(std::forward<Args>(args)...);
     }
 
     auto operator[](size_type pos) -> decltype(vec[pos]) { return vec[pos]; }

slsSupportLib/include/TypeTraits.h

@@ -35,6 +35,19 @@ struct has_str<T, typename std::conditional<
                       has_str_helper<decltype(std::declval<T>().str())>,
                       void>::type> : public std::true_type {};
 
+/**
+ * Has emplace_back method
+ */
+template <typename T, typename _ = void> struct has_emplace_back : std::false_type {};
+
+template <typename... Ts> struct has_emplace_back_helper {};
+
+template <typename T>
+struct has_emplace_back<T, typename std::conditional<
+                      false,
+                      has_emplace_back_helper<decltype(std::declval<T>().emplace_back())>,
+                      void>::type> : public std::true_type {};
+
 /**
  * Type trait to evaluate if template parameter is
  * complying with a standard container

slsSupportLib/tests/test-TypeTraits.cpp

@@ -43,4 +43,9 @@ TEST_CASE("sls::is_duration"){
 
 TEST_CASE("initializer list"){
     REQUIRE(sls::is_light_container<std::initializer_list<int>>::value == true);
+}
+
+TEST_CASE("Check for emplace back"){
+    //we know vector should have this its the type trait that is tested
+    REQUIRE(sls::has_emplace_back<std::vector<int>>::value == true);
 }