boost

问题 I am trying to build a native Android project that requires Boost library. I have built Boost for the platforms I am targeting using this git project. But for some reason find_package() for Boost fails to find the Boost header paths Below is the project structure and for the Android app, and location where I have placed the Boost library. android_app ├── src │ └──<folder> │ └──<folder> │ └──CMakeLists.txt └── lib └── boost_armeabi-v7a ├── include │ └── boost_1_68_0 │ └──boost │ ├──align.hpp │

问题 I am trying to build from source the following software in Windows 10: https://github.com/FreeOpcUa/freeopcua. I have also installed the latest version of the boost libraries ( boost_1_71_0 ) but when I try to use CMake for compiling the source code, CMake cannot find the location of boost. Environment: Windows 10 CMake version: 3.15.3 boost version: 1.71.0 I have downloaded the latest version of boost from this link: https://dl.bintray.com/boostorg/release/1.71.0/source/boost_1_71_0.zip I

问题 I am trying to build from source the following software in Windows 10: https://github.com/FreeOpcUa/freeopcua. I have also installed the latest version of the boost libraries ( boost_1_71_0 ) but when I try to use CMake for compiling the source code, CMake cannot find the location of boost. Environment: Windows 10 CMake version: 3.15.3 boost version: 1.71.0 I have downloaded the latest version of boost from this link: https://dl.bintray.com/boostorg/release/1.71.0/source/boost_1_71_0.zip I

问题 I have a minimal example of Boost serialization where I try to save an integer in a binary archive file Here is main.cpp: #include <iostream> #include <fstream> #include <boost/archive/binary_oarchive.hpp> int main() { int t = 0; std::ofstream file("Test.bin"); boost::archive::binary_oarchive archive(file); archive << t; file.close(); return 0; } and here is the CMake file: cmake_minimum_required(VERSION 3.15) project(Test) set(CMAKE_CXX_STANDARD 17) find_package(Boost REQUIRED serialization)

问题 When dealing with a const vector, the following doesn't work: const std::vector<std::string> v; v.push_back("test"); // error: v cannot be modified Instead, you have to initialize the vector on the same line where it is constructed. However, even with this restriction, boost::make_transform_iterator makes it easy to do something with another vector's elements before pushing them into v. In this example, convert is a unary function that returns a transformed version of an input element: auto

问题 I'm implementing TCP server that uses both asio socket.async_read() and boost::asio::async_read_until() methods for asynchronous reading data from socket. Both use the same handler for reading data from boost::asio::streambuf. The handler that perfectly works invoked via async_read() : void handle_read(const boost::system::error_code& ec, std::size_t ytes_transferred) ) { m_request_buffer.commit(bytes_transferred); boost::asio::streambuf::const_buffers_type rq_buf_data = m_request_buffer.data

问题 I am new to boost::iostreams so this might be trivial: Assuming namespace io = boost::iostreams; this works io::filtering_ostream out(std::cout); out << "some\nstring\n"; and this works std::string result; io::filtering_ostream out(io::counter() | io::back_inserter(result)); out << "some\nstring\n"; yet this does not compile io::filtering_ostream out(io::counter() | std::cout); out << "some\nstring\n"; How do you pipe into std::cout ? 回答1: Wrapping std::cout with boost::ref worked for me: io:

问题 I'm trying to make sure serializing works for matrices i.e. Armadillo and I'm getting some errors. I made a simple example of a random matrix and am trying to save the content using boost in a binary file, then load it using boost: #include <iostream> #include <fstream> #include <boost/archive/tmpdir.hpp> #include <boost/archive/binary_oarchive.hpp> #include <boost/archive/binary_iarchive.hpp> #include <armadillo> int main() { arma::mat A = arma::randu<arma::mat>(4,5); std::ofstream

问题 I'm trying to generate Erdos-Renyi graphs using boost graph library. In the code below, which is taken from The Boost 1.72 documentation the networks always have the same number of edges (they should not, for particular p values). I have tried using different random seeds to no avail. Thanks for any help. #include <boost/graph/adjacency_list.hpp> #include <boost/graph/erdos_renyi_generator.hpp> #include <boost/random/linear_congruential.hpp> #include <iostream> using namespace std; typedef

问题 I'm trying to generate Erdos-Renyi graphs using boost graph library. In the code below, which is taken from The Boost 1.72 documentation the networks always have the same number of edges (they should not, for particular p values). I have tried using different random seeds to no avail. Thanks for any help. #include <boost/graph/adjacency_list.hpp> #include <boost/graph/erdos_renyi_generator.hpp> #include <boost/random/linear_congruential.hpp> #include <iostream> using namespace std; typedef