改为 using namespace std;
using Type = Invoke<std::tuple_element<N, std::tuple<Ts...>>>; template <std::size_t N> using ConstType = Invoke<std::tuple_element<N, std::tuple<const Ts...>>>; std::tuple<Ts...> data; template <typename... Us> Tuple(Us&&... args) : data(std::forward<Us>(args)....
typedefvoid(*FP)(int,conststd::string&); 若不是特别熟悉函数指针与typedef的童鞋,我相信第一眼还是很难指出FP其实是一个别名,代表着的是一个函数指针,而指向的这个函数返回类型是void,接受参数是int, const std::string&。那么,让我们换做C++11的写法: usingFP =void(*) (int,conststd::string&); 我想...
at /root/git/swoole-src/src/reactor/base.cc:243 243 if (retval > 0) { (gdb) 244 if ((ssize_t) __len == retval) { (gdb) 245 return retval; (gdb) 285 } (gdb) std::__1::function<void (swoole::Buffer*)>::~function() (this=0x8209cd430) at /usr/include/c++/v1/__...
void reserve(std::size_t size) Ensures that the capacity of the storage space is at least size bytes.std::size_t capacity() returns the cacpcity of the storage space in bytes.void clear() Sets the capacity of the storage space to zero and deallocates the buffer. This operation may be...
LONG error = ERROR_MORE_DATA;std::unique_ptr<wchar_t[] > buffer; DWORD bufferLength =/* Some initial reasonable length for the string buffer */;while(error == ERROR_MORE_DATA) {// Create a buffer with bufferLength size (measured in wchar_ts)buffer =std::make_unique<wchar_t[]>(bu...
This isn't a problem if you import std. std.compat exports everything in std and adds the C runtime global namespaces such as ::printf, ::fopen, ::size_t, ::strlen, and so on. The std.compat module makes it easier to work with codebases that refer to many C runtime functions/...
if ( msg_box<mb::ok | mb::cancel>("q") == mb::ok) std::cout << "ok pressed"; Additionally, the msg_box<> knows at compile-time whether or not a button combination works:c++ Copy // ok msg_box<mb::yes | mb::no>("q"); // compile-time error msg_box<mb::ok | mb...
if( msg_box<mb::ok | mb::cancel>("q") == mb::ok)std::cout<<"ok pressed"; Additionally, the msg_box<> knows at compile-time whether or not a button combination works: c++ // okmsg_box<mb::yes | mb::no>("q");// compile-time errormsg_box<mb::ok | ...
Elapsed(); std::cout << "mpi native:\t\t"; std::cout << std::setprecision(3) << "PI =" << pi; std::cout << " in " << stop6 << " seconds\n"; } delete[] results_per_rank; The following mpi_native function is written in DPC++. This function takes five arguments...