c++ - Compiler-generated copy/assignment functions for classes with reference and const members -


The book I am reading says that when there is a member in your class that is a reference or a const. , The copy maker or assignment operators generated by the compiler will not work. For example, #include & lt; Iostream & gt; #include & lt; String & gt; using namespace std; Class text block {public: text block (string str): s (str) {cout & lt; & Lt; "Constructor is being called" & lt; & Lt; Endl; } String & amp; S; }; Int main () {text block P ("af"); Textbox q (p); Q = p; Cout & lt; & Lt; "Q's" & lt; & Lt; q.s & lt; & Lt; Endl; Return (0); }

According to my book, both lines are TextBlock q (p); and q = p; should return compiler errors, but using the G ++ compiler for Linux, I only line q = p; is getting an error, when I comment on it, it works fine and compile the code is output for the correct SQL, so it is apparently compiled by the compiler-generated copy constructor Copying. When I call line string & amp; C; to const string << / code>.

Has some changes made in C ++ that allow the copy constructor to automatically generate context and context for the object, but not the assignment operator? Or maybe I do not understand the book correctly? any idea?

The book is wrong A consultant member or reference member will disrupt the generation of the default copy assignment operator, but the compiler Does not stop making copy constructor

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