Is this destructor declaration a typo in C++ Primer (Stanley Lippman)?
In - C++ Primer, Third Edition By Stanley B. Lippman, Josée Lajoie
It says in:
15.1 Operator Overloading
As we have seen in the examples in previous chapters, operator overloading allows the programmer to define versions of the predefined operators (as discussed in Chapter 4) for operands of class type. For example, the String class presented in Section 3.15 defines many overloaded operators. Here is the definition of our String class:
#include <iostream>
class String;
istream& operator>>( istream &, String & );
ostream& operator<<( ostream &, const String & );
class String {
public:
/ overloaded set of constructors
// provide automatic initializat开发者_Go百科ion
String( const char * = 0 );
String( const String & );
// destructor: automatic deinitialization **------> NOTE**
String(); //**------> NOTE**
// overloaded set of assignment operators
String& operator=( const String & );
String& operator=( const char * );
// overloaded subscript operator
char& operator[]( int ) const;
// overloaded set of equality operators
// str1 == str2;
bool operator==( const char * ) const;
bool operator==( const String & ) const;
// member access functions
int size() { return _size; }
char* c_str() { return _string; }
private:
int _size;
char *_string;
};
How can String()
be a destructor? Isn't a destructor supposed to appear with a Tilde prefixing it, like this ~String()
?
Guess, i found mistakes in the book recommended by SO
Yes. Looks like a typo to me. Did you copy the code from an accompanying cd-rom or something?
It sounds like a typo -- String
would definitely be a constructor, and ~String
a destructor.
You're right - that looks like a typo to me, although I couldn't find an errata listing for that book.
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