Chombo + EB + MF  3.2
Printable.H
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1 #ifdef CH_LANG_CC
2 /*
3  * _______ __
4  * / ___/ / ___ __ _ / / ___
5  * / /__/ _ \/ _ \/ V \/ _ \/ _ \
6  * \___/_//_/\___/_/_/_/_.__/\___/
7  * Please refer to Copyright.txt, in Chombo's root directory.
8  */
9 #endif
10 
11 #ifndef _PRINTABLE_H_
12 #define _PRINTABLE_H_
13 
14 #include <ostream>
15 #include "BaseNamespaceHeader.H"
16 
17 /**
18  * This class encapsulates the concept of `printability',
19  * it automatically associates the output operator
20  * to a derived class via a virtual method
21  * to get around the problem of polymorphic operator being illegal in C++.
22  *
23  * Typical usage:
24  * (1) inherit from Printable
25  * Class A : Class Printable
26  * (2) define the method print() in A
27  * (3) use '<<' operator for objects of class A
28  *
29  * Variants of print can be added for different flavors.
30  */
31 class Printable
32 {
33 public:
34  virtual ~Printable()
35  {
36  }
37 
38  virtual void print(std::ostream& ) const = 0;
39 };
40 
41 inline std::ostream& operator<< (std::ostream& os, const Printable& p)
42 {
43  p.print(os);
44  return os;
45 }
46 
47 #include "BaseNamespaceFooter.H"
48 #endif
virtual ~Printable()
Definition: Printable.H:34
std::ostream & operator<<(std::ostream &os, const Printable &p)
Definition: Printable.H:41
virtual void print(std::ostream &) const =0
Definition: Printable.H:31