boost

问题 I have to pass a boost::shared_ptr : boost::shared_ptr<Protobuf::Person::Profile> pProfile = boost::make_shared<Protobuf::Person::Profile>(); which is protobuf's pointer, to a protobuf's function oPerson.set_allocated_profile(pProfile) but oPerson.set_allocated() expects a pointer to Protobuf::Person::Profile . I have tried couple of ways but I think when I try to convert protobuf object to JSON using pbjson::pb2Json which is a library function built on rapid json, the pointer goes out of

问题 I have to pass a boost::shared_ptr : boost::shared_ptr<Protobuf::Person::Profile> pProfile = boost::make_shared<Protobuf::Person::Profile>(); which is protobuf's pointer, to a protobuf's function oPerson.set_allocated_profile(pProfile) but oPerson.set_allocated() expects a pointer to Protobuf::Person::Profile . I have tried couple of ways but I think when I try to convert protobuf object to JSON using pbjson::pb2Json which is a library function built on rapid json, the pointer goes out of

问题 A simple parser as on Coliru. The parser -(+x3::alpha) should be able to propagate an attribute of type boost::optional<std::string> as Qi does. But it does not compile. std::string const input = "abc"; boost::optional<std::string> attr; if(x3::parse(boost::begin(input),boost::end(input), -(+x3::alpha), attr)) { std::cout<<"match!"<<std::endl; } else { std::cout<<"NOT match!"<<std::endl; } 回答1: I don't think the normative claim "should be able [...] as Qi does" cuts wood. X3 is not an

问题 I've read this and then this questions about how to efficiently read big amount of text (floats in the second question) in C++ exploiting the boost::spirit library. From what I've seen, the solutions proposed in the questions above read the whole text, while I need to read a portion of the input text (for example from char x to char y). Can I exploit the library above for this purpose? How could I efficiently do it otherwise? 回答1: You don't even need to map a subsection of the file, because

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . I have implemented udp_client and 'udp_server` where server and client follows a pull model. The server pushes the data only when the client requests it. I want to change this to push model where server pushes the data down to the client when data is available. My source files, header files and make is given

问题 I am trying to write a template wrapper that works with the smart_ptr type and need to throw an exception in some cases. For this case I'd like to include the name of the type the class is wrapping. As I am working with smart pointers only forward declarations will be available for the type. So the essential question is how can I get a string for of a template parameter without having its definition available? (I don't need a clean name, anything resembling the name will be fine) My attempt

问题 I am trying to write a template wrapper that works with the smart_ptr type and need to throw an exception in some cases. For this case I'd like to include the name of the type the class is wrapping. As I am working with smart pointers only forward declarations will be available for the type. So the essential question is how can I get a string for of a template parameter without having its definition available? (I don't need a clean name, anything resembling the name will be fine) My attempt

问题 I'm trying to expose my C++ Classes to Python using Boost.Python. Here is a simplyfied version of what I'm trying to do: struct Base { virtual ~Base() {}; virtual char const *Hello() { printf("Base.Hello\n"); return "Hello. I'm Base."; }; }; struct Derived : Base { char const *Hello() { printf("Derived.Hello\n"); return "Hello. I'm Derived."; }; Base &test() { printf("Derived.test\n"); // ... // After some calculation, we get result reference `instance' // `instance' can be an instance of

问题 I've downloaded boost_1_61_0 and unzipped it. I used bootstrap.bat generating b2.exe and bjam.exe and successfully built libraries in a folder named "stage" for both x64 and win32 . After I have .lib and boost folders containing include files. When I remove the root folder I can't build my program. Why am I unable to build the code? I have used bs as: b2 -j8 toolset=msvc-14.0 address-model=64 architecture=x86 link=static threading=multi runtime-link=shared --build-type=minimal stage -

问题 When would I use boost::equality_comparable vs overriding T's bool operator==(T const& rhs) method? Here's some sample code. #include <boost/operators.hpp> enum class AnEnum : uint64_t; struct Base : boost::equality_comparable<Base> { std::shared_ptr<AnEnum > units; std::shared_ptr<int> value; bool operator ==(Base const& rhs) { return (*value == *rhs.value) && (*units == *rhs.units); } friend bool operator == (const Base & lhs, const Base & rhs) { return (*lhs.value == *rhs.value) && (*lhs