WebAug 11, 2024 · std::size_t hash_code() const noexcept; (since C++11) Returns an unspecified value (here denoted by hash code) such that for all std::type_info objects referring to the same type, their hash code is the same. No other guarantees are given: std::type_info objects referring to different types may have the same hash code … WebFollowing is the declaration for std::type_info::name. C++98 const char* name() const; C++11 const char* name() const noexcept; Parameters. none. Return Value. It returns a null-terminated character sequence that may identify the type. Exceptions. No-throw guarantee − this member function never throws exceptions. Data races. The locale object ...
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http://www.duoduokou.com/cplusplus/17268335123597330843.html Web仅在C++17及更高版本中有效。此外，在需要删除的 ； 之前有一个错误的 ） ，正确的语句是： if（const size\u t pos=name.find（前缀）；pos！=string:：npos） 对于C++的早期版本，需要将代码 > POS /代码>从代码>中分离出来，如果 语句： const size\u t pos=name.find（前缀）； if ... the play shed stafford
C++函数中获得参数数组的大小-爱代码爱编程
Web（A） 如果我想将typeinfo对象存储在无序的集合中，我需要做什么. typeinfo支持==和name（）方法。该名称可用于生成哈希，并==表示相等 （B） 如果我想在一个有序的集合（std:：set）中存储typeinfo对象，我需要做什么 WebAug 15, 2015 · The safest, easiest and most correct way to do this would be to add a virtual name function of your own to Resource: virtual std::string name () const = 0; Then override it in every subclass to return the name of the class. Share. WebNov 17, 2024 · If you want to print the type of the object itself, try typeid (*u.get ()).name (). If you want polymorphic behaviour, use polymorphic classes. This requires defining at least one virtual function in Base. You need to define a virtual destructor anyway for correct behaviour of object deletion. the play shakespeare