Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is an older version of Boost and was released in 2013. The current version is 1.90.0.

any

any

Description

A metafunction returning the result type of any.

Synopsis

template<
    typename Sequence,
    typename F
    >
struct any
{
    typedef bool type;
};

Table 1.56. Parameters

Parameter	Requirement	Description
`Sequence`	A model of Forward Sequence	Operation's argument
`F`	A model of unary Polymorphic Function Object	Operation's argument

Expression Semantics

result_of::any<Sequence, F>::type

Return type: bool.

Semantics: Returns the return type of any given a sequence of type Sequence and a unary Polymorphic Function Object of type F. The return type is always bool.

Complexity

Constant.

Header

#include <boost/fusion/algorithm/query/any.hpp>
#include <boost/fusion/include/any.hpp>