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select_2nd Struct Template Reference

Selects the second member of an instance and applies the parameterising functional to it. More...

#include <stlsoft_functionals.h>

List of all members.

Public Methods
	select_2nd ()
	Default constructor.
	select_2nd (F f)
	Constructs from the given function object, which it will then apply via operator()().
template<typename T> void	operator() (T &t)
	Function call operator, which applies the parameterising function object to the second part of the pair t.

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Detailed Description

template<typename F>
struct stlsoft::select_2nd< F >

Selects the second member of an instance and applies the parameterising functional to it.

This functional selects the "second" member of an instance (obviously this is usually the std::pair type), and applies the parameterising functional to it.

For example, if you have a std::map and wish to write out the values with a dump_value functional, you could achieve this with the following:

  std::for_each(m.begin(), m.end(), stlsoft::select_2nd<dump_value>());

Parameters:

F	The parameterising functional

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Constructor & Destructor Documentation

select_2nd (    )  [inline]

Default constructor.

select_2nd (  F    f )  [inline, explicit]

Constructs from the given function object, which it will then apply via operator()().

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Member Function Documentation

void operator() (  T &    t )  [inline]

Function call operator, which applies the parameterising function object to the second part of the pair t. Parameters: t  An instance of a pair like type, to whose second member will be applied the function F

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The documentation for this struct was generated from the following file:

• stlsoft_functionals.h

STLSoft Libraries documentation © Synesis Software Pty Ltd, 2001-2004