Feature: injectable strict shared pointer (#14)

Signed-off-by: Dmitriy Khaustov aka xDimon <[email protected]>

Author: xDimon

src/qtils/strict_sptr.hpp

@@ -4,6 +4,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#pragma once
+
 #include <memory>
 #include <stdexcept>
 #include <type_traits>
@@ -43,6 +45,13 @@ namespace qtils {
       }
     }
 
+  private:
+   struct ForceInject{}; // Auxiliary arg appended to select ctor for DI
+
+  public:
+    StrictSharedPtr(std::shared_ptr<T> sptr, ForceInject):
+         StrictSharedPtr(std::move(sptr)) {}
+
     // Copy constructor and assignment
     StrictSharedPtr(const StrictSharedPtr &) = default;
     StrictSharedPtr &operator=(const StrictSharedPtr &) = default;