add noexcept to all methods in demo classes

Author: daixtrose

polymorphism/include/polymorphism/impl_with_interface.hpp

@@ -14,8 +14,8 @@ class Impl
     std::string s_ { "<default value>" }; // with default member initializer (C++11)
 
 public:
-    std::string coolFeature() const override { return s_; }
-    void set(std::string s) override
+    std::string coolFeature() const noexcept override { return s_; }
+    void set(std::string s) noexcept override
     {
         s_ = std::move(s);
     }

polymorphism/include/polymorphism/impl_without_interface.hpp

@@ -12,8 +12,8 @@ class Impl {
     std::string s_ { "<default value>" }; // with default member initializer (C++11)
 
 public:
-    std::string coolFeature() const { return s_; }
-    void set(std::string s)
+    std::string coolFeature() const noexcept { return s_; }
+    void set(std::string s) noexcept
     {
         s_ = std::move(s);
     }