_Scary_val> _Mypair;,但字符串真正内存是堆区申请出来的,由成员_Mypair._Myval2._Myptr()指过去,加上模板类重载了操作符,一定程度可以const char*,以及char [N]进行转换。新加VS2019下string的剖析rayhunter:C++中VS2019下STL的string剖析37 赞同 · 8 评论文章不要纠结
_Scary_val> _Mypair;,但字符串真正内存是堆区申请出来的,由成员_Mypair._Myval2._Myptr()指过...
当我们调用c_str()时,本质上是在调用如下方法 constexprconstvalue_type* _Myptr()constnoexcept {constvalue_type* _Result = _Bx._Buf;// 判断是否是长字符串if(_Large_string_engaged()) { _Result = _Unfancy(_Bx._Ptr); }return_Result; } constexprbool_Large_string_engaged()constnoexcept {#i...
const size_type _Right_size = _Right_data._Mysize; const _Elem* const _Right_ptr = _Right_data._Myptr(); auto& _My_data = _Mypair._Myval2; #ifdef __cpp_lib_constexpr_string const bool _Stay_small = _Right_size < _BUF_SIZE && !_STD is_constant_evaluated(); #else // ^^...
_Myptr()+ (_Off < offset ? offset +count : offset), count);//substringelse_Traits::copy(_Myptr()+Off, right.Myptr()+ offset, count);//fill hole_Eos(Num); }return(*this); }string& insert(size_type Off,constchar*ptr, size_type count);string& insert(size_type Off,constchar*ptr...
constexpr const value_type* _Myptr() const noexcept { const value_type* _Result = _Bx._Buf; // 判断是否是长字符串 if (_Large_string_engaged()) { _Result = _Unfancy(_Bx._Ptr); } return _Result; } constexpr bool _Large_string_engaged() const noexcept { ...
constexpr const value_type* _Myptr() const noexcept { const value_type* _Result = _Bx._Buf;// 判断是否是长字符串 if (_Large_string_engaged()) { _Result = _Unfancy(_Bx._Ptr);} return _Result;} constexpr bool _Large_string_engaged() const noexcept { #if _HAS_CXX20 // 判断...
const _Elem *c_str() const { // return pointer to null-terminated nonmutable array return (_Myptr()); } const _Elem *data() const { // return pointer to nonmutable array return (c_str()); }©2022 Baidu |由 百度智能云 提供计算服务 | 使用百度前必读 | 文库协议 | 网站地图 | ...
问如何将std::vector<std::string>作为char**传递?EN您已经构造并填充了字符串的向量:std::vector<...
= &_Right // pre: *this owns no memory, iterators orphaned (note: // _Buf/_Ptr/_Mysize/_Myres may be garbage init) auto& _Right_data = _Right._Mypair._Myval2; const size_type _Right_size = _Right_data._Mysize; const _Elem* const _Right_ptr = _Right_data._Myptr(); ...