LIBS=On`: Build both shared andstaticlibraries. (off bydefault)* `-DCMAKE_INSTALL_PREFIX=/usr`: Set a prefixforthe installation.* `-DENABLE_LOCALES=On`: Enable the usage of localeconv method. ( on bydefault)* `-DCJSON_OVERRIDE_BUILD_SHARED_LIBS=On`: Enable overriding the value of `...
explicit operator bool() 允许到 bool 的显式转换 - 例如,在给定 shared_ptr<X> sp 的情况下,bool b(sp) 和static_cast<bool>(sp) 都有效 - 允许对 bool 进行布尔值可测试的“上下文转换”- 例如,if (sp)、!sp、sp && 等。 但是,explicit operator bool() 禁止隐式转换为 bool,因此不能使用 bool...
15.17.1.9. Passing pointers (or: passing parameters by reference) Sometimes a C api function expects a pointer to a data type as parameter, probably to write into the corresponding location, or if the data is too large to be passed by value. This is also known as passing parameters by re...
// 类classA{private:constint a;// 常对象成员,只能在初始化列表赋值public:// 构造函数A(){};A(int x):a(x){};// 初始化列表// const可用于对重载函数的区分intgetValue();// 普通成员函数intgetValue()const;// 常成员函数,不得修改类中的任何数据成员的值};voidfunction(){// 对象Ab;// ...
To address this issue, change reference types either to a pointer or a value. Changing the type to a pointer requires changes in the code that uses the union field. Changing the code to a value would change the data stored in the union, which affects other fields since fields in union ...
DLL reference counter DLL will not create .lib file dll's require CRT 9.0.21022.8, 9.0.30729.1 installed from msm, but doesn't work DllregisterServer failed with error code 0x80029c4a while register a dll built in VS 2015 Does anybody know how to use LIBXML2 in Visual Studio C or comm...
Shared Library shrlibsample double * doublePtr double addDoubleRef float * singlePtr single intsize * (integer pointer types) (u)int(size)Ptr For example, int64 * becomes int64Ptr. (u)int(size) multiplyShort byte[] int8Ptr int8 char[] (null-terminated string passed by value) cstring...
unique_ptr weak_ptr auto_ptr(被 C++11 弃用)Class shared_ptr 实现共享式拥有(shared ownership)概念。多个智能指针指向相同对象,该对象和其相关资源会在 “最后一个 reference 被销毁” 时被释放。为了在结构较复杂的情景中执行上述工作,标准库提供 weak_ptr、bad_weak_ptr 和 enable_shared_from_this 等辅助...
unique_ptr weak_ptr auto_ptr(被 C++11 弃用)Class shared_ptr 实现共享式拥有(shared ownership)概念。多个智能指针指向相同对象,该对象和其相关资源会在 “最后一个 reference 被销毁” 时被释放。为了在结构较复杂的情景中执行上述工作,标准库提供 weak_ptr、bad_weak_ptr 和 enable_shared_from_this 等辅助...
宁以pass-by-reference-to-const 替换 pass-by-value (前者通常更高效、避免切割问题(slicing problem),但不适用于内置类型、STL迭代器、函数对象) 必须返回对象时,别妄想返回其 reference(绝不返回 pointer 或 reference 指向一个 local stack 对象,或返回 reference 指向一个 heap-allocated 对象,或返回 pointer ...