modern_cpp_training

My Personal Modern C++ Hands-On Training

This repo is my personal hands-on training around Scott Meyers' "Effective Modern C++". Each project covers a topic that I found significant and I wanted to give it a try. Most of the code is original, however, there are some copy-paste from other site examples, like cppreference.com

In each subfolder there is a separate CMake project. To create new project in top of the existing ones, use:

./make_new_project <project_name>

To compile all projects in one shot, use the root CMakeFiles.txt or compile one by one by diving in each project's subdir.

SubProjects:

move-semantics

Demonstrates move-constructor performance call on a class, by printing all construction, destructor, copy and movement of an object across different types of assignment.

Note: for catching value copy when returning by value, the compiler optimization is removed.

See CMakeLists.txt

target_compile_options(move-statements PRIVATE -fno-elide-constructors)

Compile with and without it, also with and without C++11

#set (CMAKE_CXX_STANDARD 98) 

Output:

C++ 98 with "-fno-elide-constructors" - makes extra copy on function return values, usually optimized out by modern compilers

default constructor
copy constructor
default destructor
copy constructor
default destructor
default destructor

C++ 11 with "-fno-elide-constructors":

default constructor
move constructor
default destructor
move constructor
default destructor
default destructor

C98 default:

default constructor
default destructor

C++ 11 default:

default constructor
default destructor