void MainPage::OnPointerPressed(winrt::Windows::UI::Xaml::Input::PointerRoutedEventArgs const& e) { winrt::Windows::Foundation::Point const point{ e.GetCurrentPoint(nullptr).Position() }; std::wostringstream wostringstream; wostringstream << L"Pointer pressed at (" << point.X << L",...
const_pointer _M_local_data() const { return std::pointer_traits<const_pointer>::pointer_to(*_M_local_buf); } 这里可以看见M_dataplus表示实际存放数据的地方,当string是空的时候,其实就是指向M_local_buf,且_M_string_length是0。 当由char*构造string时,构造函数如下: 代码语言:javascript 代码运...
* objects. AcquireMallocatedString means that the user passes a * pointer to a malloc-allocated string that the fbstring object will * take into custody. */enum class AcquireMallocatedString {};// Nonstandard constructorbasic_fbstring(value_type *s, size_type n, size_type c, AcquireMallocat...
__init(_VSTD::__to_raw_pointer(__str.__get_long_pointer()), __str.__get_long_size()); #if _LIBCPP_DEBUG_LEVEL >= 2 __get_db()->__insert_c(this); #endif } 左值拷贝构造函数的源字符串如果为 短字符串,使用数组(__raw)的方式直接拷贝; 长字符串,使用__init方法进行内存拷贝。
identical to// typedef void (*func)(int, int);using func=void(*)(int,int);// the name 'func' now denotes a pointer to function:voidexample(int,int){}func f=example;// alias templatetemplate<classT>using ptr=T*;// the name 'ptr<T>' is now an alias for pointer to Tptr<int>...
// cpp_attr_ref_string.cpp// compile with: /LD#include"unknwn.h"[module(name="ATLFIRELib")]; [export,string]typedefchara[21]; [dispinterface, restricted, uuid("00000000-0000-0000-0000-000000000001")] __interface IFireTabCtrl { [id(1)]HRESULTMethod3([in,string]char*pC); }; ...
pointer __get_pointer() _NOEXCEPT {return __is_long() ? __get_long_pointer() : __get_short_pointer();} _LIBCPP_INLINE_VISIBILITY const_pointer __get_pointer() const _NOEXCEPT {return __is_long() ? __get_long_pointer() : __get_short_pointer();} 另外还定义了两个静态常量作为...
ptr: Pointer to the block of memory where data will be read into. size: Size in bytes of each element to be read. count: Number of elements, each one with a size ofsize, to be read. stream: Pointer to aFILEobject that specifies the input stream. ...
string& string::insert(size_type idx, const char* chars, size_type chars_len)idx:index number where insertion is to be made.*chars:is the pointer to the array.chars_len:is the number of characters to be inserted from character array.返回:*thisErrors:Throwsout_of_rangeif idx > size()...
* @param __p Pointer to the memory to deallocate. * @param __n The number of objects space was allocated for. * * Calls a.deallocate(p, n) */ static void deallocate(_Alloc& __a, pointer __p, size_type __n) { __a.deallocate...