apolukhin/boost-cookbook

Online examples from "Boost C++ Application Development Cookbook":

Boost C++ Application Development Cookbook, Second Edition

This repository contains all the code examples from the

• Boost C++ Application Development Cookbook, Second Edition (ISBN: 9781787282247), Packt Publishing, by Antony Polukhin.
• Разработка приложений на C++ с использованием Boost (ISBN: 9785970608685), ДМК Пресс, by Антон Полухин (Antony Polukhin).

Compile and Run Examples Online.

Content

This repository contatins project files for QtCreator IDE. BoostBook.pro - is the main project file. See config.txt file for setupping platform specific flags.

QtCreator's project files are very simple and it's easy to understand what is required for example compilation by just opening the '.pro' file with any text editor.

All source code is distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

Coding style

Some of the C++ coding styles are broken to fit better cookbook educational format:

• Headers are not always included in the beginning of source and header files.

This is done in attempt to show in which header which classes and functions are defined. Another goal of doing so, is to avoid errors while copying parts of code to book (it is simpler and safer to copy required peace of code at once, instead of gathering together headers and code parts all across the project).

• Our own classes are declared in global namespace (instead of separate namespace).

This is done to reduce amount of unrequired text in book.

• Usually no aliases for namespaces used and usually no using namespace used.

This is done for your simplicity. You may open any recipe, start it from the middle of 'How to do it' part and see a working part of code that does not require searching all around the chapter for an answer 'In what namespace is this class defined?'.

Thanks

Thanks to Heather Gopsill from Packt Publishing for giving a permission to make sources publicly available. Thanks to Nitin Dasan from Packt Publishing for getting all the necessary approvals for making sources publicly available for the second edition of the book.

Notes for book update

For year 2022+ :

• Separate chapters on Graphs/Testing/Image processinggit
• Remove description of all the Boost libraries that were added into C++11 (including Boost.Move)
• More recipes for unordered containers
• Move string_view into the first chapter
• Pimpl example using ...?
• Boost.Range recipes
• boost::allocate_shared ?
• Dig into the boost::function and statefull allocator support?
• Boost.Convert examples
• Add a very simple example on regexes.
• MPL11 example (Something like "Finding the sequential layout ordering of N different types that would minimize padding due to alignment between them").
• Add an example on stateful allocators in Boost.
• Add an example on Boost.PolyCollection.

boost-cookbook's Issues

Chapter05/02_mutex/main.cpp

i have trouble with compilation on raspberry pi but finally got in working.
heres the code:

#include <boost/thread/mutex.hpp>
#include <boost/thread/locks.hpp>
#include <boost/thread.hpp>
#include <iostream>

namespace with_sync {

int shared_i = 0;
boost::mutex i_mutex;

void do_inc() {
    for (std::size_t i = 0; i < 30000; ++i) {
        int i_snapshot;
        {   // Critical section begin.
            boost::lock_guard<boost::mutex> lock(i_mutex);
            i_snapshot = ++shared_i;
        }   // Critical section end.
        std::cout<<i_snapshot<<std::endl;
        // Do some work with i_snapshot.
        // ...
        (void)i_snapshot;
    }
}

void do_dec() {
    for (std::size_t i = 0; i < 30000; ++i) {
        int i_snapshot;
        {   // Critical section begin.
            boost::lock_guard<boost::mutex> lock(i_mutex);
            i_snapshot = -- shared_i;
        }   // Critical section end.
            std::cout<<i_snapshot<<std::endl;
        // Do some work with i_snapshot.
        // ...
        (void) i_snapshot;
    }
}

int run() {
    boost::thread t1(&do_inc);
    boost::thread t2(&do_dec);

    t1.join();
    t2.join();

    assert(shared_i == 0);
    std::cout << "shared_i == " << shared_i;
}

} // namespace without_sync
int main() {
with_sync::run();
return 0; };

i have to add to CMakeLists.txt:

target_link_libraries(BoostTest ${Boost_LIBRARIES} -lpthread)
target_link_libraries(BoostTest ${Boost_LIBRARIES} -lboost_thread)

do these things double each other ?
but without any of them get a error.

unknown type name _lock_policy - Ubuntu 18.04

to include file /usr/include/c++/7/backward/auto_ptr.h
similar change is also required if g++-8 is used eg. /usr/include/c++/8/backward/auto_ptr.h

added line 35
#include <tr1/memory>

error: Circular main.o <- variant dependency dropped. Ubuntu 18.04

Any ideas?

global_i doesn't exist, see comment assert(global_i == 0); // Oops!

global_i not declared

What assert(global_i == 0); // Oops! means?

See

Boost-Cookbook/Chapter05/02_mutex/main.cpp

Line 40 in 912e36f

// assert(global_i == 0); // Oops!

error: DSO missing from command line libpthread.so.0

Any ideas?

start up on Raspberry pi [SOLVED]

hi !
thanks for the Book. but it took me a time to just start up with even "Hello world" example )
i work on Raspberry pi Raspbian bullseyes.
so for those whos suffring as i was i wrote short intro how to start with boost on raspberry pi:

sudo apt install libboost-all-dev

nano main.cpp

#include <boost/program_options.hpp>
#include <iostream>

namespace opt = boost::program_options;

int main(int argc, char *argv[])
{
    // Constructing an options describing variable and giving it a
    // textual description "All options".
    opt::options_description desc("All options");

    // When we are adding options, first parameter is a name
    // to be used in command line. Second parameter is a type
    // of that option, wrapped in value<> class. Third parameter
    // must be a short description of that option.
    desc.add_options()
        ("apples", opt::value<int>(), "how many apples do you have")
        ("oranges", opt::value<int>(), "how many oranges do you have")
        ("help", "produce help message")
    ;

    // Variable to store our command line arguments.
    opt::variables_map vm;

    // Parsing and storing arguments.
    opt::store(opt::parse_command_line(argc, argv, desc), vm);

    // Must be called after all the parsing and storing.
    opt::notify(vm);

    if (vm.count("help")) {
        std::cout << desc << "\n";
        return 1;
    }

    std::cout << "Fruits count: "
        << vm["apples"].as<int>() + vm["oranges"].as<int>()
        << std::endl;

} // end of `main`

nano CMakeLists.txt

cmake_minimum_required(VERSION 3.3)
project(BoostTest)

FIND_PACKAGE(Boost COMPONENTS program_options REQUIRED)
INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS})

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
#set(CMAKE_CXX_FLAGS "-lboost_program_options")

set(SOURCE_FILES main.cpp)
add_executable(BoostTest ${SOURCE_FILES})
target_link_libraries(BoostTest ${Boost_LIBRARIES} -lpthread)
target_link_libraries(BoostTest ${Boost_LIBRARIES} -lboost_program_options)

cmake . 
make

./BoostTest --apples 20 --oranges 30

error: undefined reference to symbol 'pthread_condattr_setclock@@GLIBC_2.3.3'

I have tried QMAKE_CXXFLAGS += -Wall -std=c++11 -pthread and LIBS += -lpthread and have been unable to resolve. Any ideas as to what I doing wrong?

Spirit examples using `auto`

Looks like there's an issue with replacing SPIRIT rules with auto. Make a minimized example and report the issue (or fix the examples, if there's no issue). Add CI tests.