template<typename T>void f (T&& val) { g(std::forward<T>(val));}int main(){ X v; // create variable X const c; // create constant f(v); // f() for variable calls f(X&) => calls g(X&) f(c); // f() for constant c
结构体是⼀些值的集合,这些值称为成员变量。结构的每个成员可以是不同类型的变量。稍微复杂的类型,直接使用内置类型是不行的!比如:描述一个人这时候,我们就可以用结构体来定义结构体中可以包含各种类型的数据,用来描述一个复杂对象的各种属性 2.1 结构体的声明 9 1 struct tag { member-list;//名字可以...
templatevoid f(T::type) { } struct A { }; void g() { A a; f(a); } $ gcc-4.9 t.cc t.cc:1:33: error: variable or field 'f' declared void templatevoid f(T::type) { } ^ t.cc: In function 'void g()': t.cc:6:5: error: 'f' was not declared in this scope f(...
In the factory template, set the m_lpfnNew member variable to the address of this static function. The function pointer type is LPFNNewCOMObject. The following example shows a typical function for m_lpfnNew: C++ Copy CUnknown * WINAPI CMyComponent::CreateInstance(LPUNKNOWN pUnk, HRESULT *pHr...
/root/examples/chapter09/04-clang-tidy/src/calc.cpp:3:11: warning: method 'Sum' can be made static [readability-convert-member-functions-to-static] int Calc::Sum(int a, int b) { ^ [ 12%] Building CXX object bin/CMakeFiles/sut.dir/run.cpp.o ...
编译器错误 C3740 “template”: 模板不能发出或接收事件 编译器错误 C3741 “class”: 当 event_receiver 的“layout_dependent”参数为 true 时,必须是组件类 编译器错误 C3742 “token1”:“attribute”的属性参数中的标记顺序不均衡,应为“token2” ...
*/typedefstructBoxStruct{inta;/**< Some documentation for the member BoxStruct#a. */intb;/**< Some documentation for the member BoxStruct#b. */doublec;/**< Etc. */} tBoxStruct; 对于一些需要说明的变量,可以在变量前加上一段Doxygen注释,方便度代码的人查看,也可以声称在比如HTML等文档中。
* \file template.h * \brief Template include file */ /* Here is empty line */ 每个文件(头文件或源文件)必须包含许可证(开始注释包括单个星号,因为doxygen必须忽略这个) 使用与项目/库已经使用的相同的许可证 /** * \file template.h * \brief Template include file ...
The current compiler correctly gives an error, because the template parameter type doesn't match the template argument (the parameter is a pointer to a const member, but the function f is non-const): Output Copy error C2893: Failed to specialize function template 'void S2::f(void)'note:...
VexCL - A C++ vector expression template library for OpenCL/CUDA. [MIT] STAPL - A C++ parallel programming framework designed to work on both shared and distributed memory parallel computers. [BSD] concurrencpp - A general concurrency library containing tasks, executors, timers and C++20 coroutin...