(C++) std::mem_fun_ref

 

std::mem_fun_ref is an adapter to be able to use algorithms on a member function of T stored in a container as T (compare std::mem_fun, to use algorithms on a member function of T stored in a container as T* ).

 

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#include <algorithm> #include <iostream> #include <vector> struct MyClass {   void SayHello() const { std::cout << "Hello" << std::endl; } };

 

Screen output:

 

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Hello Hello Hello

 

 

 

 

 

 

Full example

 

• Download the Qt Creator project 'CppMem_fun_ref' (zip)

 

 

 

 

 

Technical facts

 

Application type(s)

• Desktop application

Operating system(s) or programming environment(s)

• Lubuntu 12.10 (quantal)

IDE(s):

• Qt Creator 2.5.2

Project type:

• Console application

C++ standard:

• C++98

Compiler(s):

• G++ 4.7.2

Libraries used:

• STL: GNU ISO C++ Library, version 4.7.2

 

 

 

 

 

Qt project file: CppMem_fun_ref.pro

 

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TEMPLATE = app CONFIG += console CONFIG -= qt SOURCES += main.cpp QMAKE_CXXFLAGS += -Wall -Wextra -Weffc++ -Werror

 

 

 

 

 

main.cpp

 

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#include <algorithm> #include <iostream> #include <vector> struct MyClass {   void SayHello() const { std::cout << "Hello" << std::endl; } }; int main() {   std::vector<MyClass> v(3);   std::for_each(v.begin(), v.end(), std::mem_fun_ref(&MyClass::SayHello)); }