std::function<void(conststd::string&)>f1;std::function<void(conststd::string&)>f2;bool eq=f1.target<void(*)(conststd::string&)>()==f2.target<void(*)(conststd::string&)>()
本文旨在探讨C++11中引入的 std::function的实现原理. 应用 在正常使用时function 主要会用来存储可调用的对象,如函数指针、可调用类、类成员函数、lambda等. 如下是正常使用时可能会出现的场景. #include <fu…
A pointer to the stored function iftarget_type()==typeid(T), otherwise a null pointer. Example Run this code #include <functional>#include <iostream>intf(int,int){return1;}intg(int,int){return2;}voidtest(std::function<int(int,int)>const&arg){std::cout<<"test function: ";if(arg....
The target is of type std::decay<F>::type.If f is a null pointer to function, a null pointer to member, or an empty value of some std::function specialization, *this will be empty right after the call.This overload participates in overload resolution only if all following conditions ...
:function<CurlCallback>(std::bind(&NetworkResource::writeFunction,this,_1,_2,_3,_4)).target<...
2.在int main()后都是“using names 分享31赞 c++吧 cloud444733905 std::function::target 实现的bug原实现为: template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> const void* __func<_Fp, _Alloc, _Rp(_ArgTypes...)>::target(const type_info& __ti) const _NOEXCEPT { ...
std::function::target_type std::generic_category std::get std::get(std::pair) std::get(std::tuple) std::getenv std::get_deleter std::get_if std::get_new_handler std::get_pointer_safety std::get_temporary_buffer std::get_terminate std::get_unexpected std::gmtime std::greater std:...
Code fn main() { unsafe { std::slice::from_raw_parts(std::ptr::null() as *const u16, 0); } } Expected: No panic, aligning with behavior on *-pc-windows-msvc Actual: thread 'main' panicked at library\core\src\panicking.rs:155:5: unsafe pr...
std::function::assign std::function::function std::function::operator bool std::function::swap std::function::target std::function::target_type std::generic_category std::get std::get(std::pair) std::get(std::tuple) std::getenv std::get_deleter std::get_if std::get_new_handler std...
}else{// Opening output fileoutputFile.open("outputFile.txt");// Opening saving file/*if((ptr_fp = fopen("cppTestOutput.bin", "ab")) == NULL) { printf("Unable to open file!\n"); exit(1); }else printf("Opened file successfully for writing.\n");*/// Adding important informatio...