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(C++) StdFunctionExample2

 

C++11STLQt CreatorLubuntu

 

std::function example 2: member functions is a std::function example.

 

Technical facts

 

Operating system(s) or programming environment(s)

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C++ standard:

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Qt project file: ./CppStdFunctionExample2/CppStdFunctionExample2.pro

 

TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt

SOURCES += main.cpp

#
#
# Type of compile
#
#

CONFIG(debug, debug|release) {
  message(Debug mode)
}

CONFIG(release, debug|release) {
  message(Release mode)

  #Remove all asserts and TRACE
  DEFINES += NDEBUG NTRACE_BILDERBIKKEL
}

#
#
# Platform specific
#
#

#
#
# Compiler flags
#
#
QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra

unix {
  QMAKE_CXXFLAGS += -Werror
}

 

 

 

 

 

./CppStdFunctionExample2/main.cpp

 

#include <iostream>
#include <functional>

struct Speaker
{
  Speaker(const std::string hello_message, const std::string bye_message)
    : m_hello_message(hello_message),
      m_bye_message(bye_message)
  {

  }

  void SayHello() const { std::cout << m_hello_message << '\n'; }
  void SayBye() const { std::cout << m_bye_message << '\n'; }

  const std::string m_hello_message;
  const std::string m_bye_message;
};

int main()
{
  const Speaker s1("Hello!","Bye!");
  const Speaker s2("HELLO!","BYE!");

  const std::function<void (const Speaker*)> say_hello_function = &Speaker::SayHello;
  const std::function<void (const Speaker*)> say_bye_function = &Speaker::SayBye;

  say_hello_function(&s1);
  say_bye_function(&s1);

  say_hello_function(&s2);
  say_bye_function(&s2);
}

/* Screen output:

Hello!
Bye!
HELLO!
BYE!
Press <RETURN> to close this window...

*/

 

 

 

 

 

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