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## Function template visitor_ptr

boost::visitor_ptr — Returns a visitor object that adapts function pointers for use as a static visitor.

## Synopsis

    // In header: <boost/variant/visitor_ptr.hpp>

    template<typename R, typename T> visitor_ptr_t<T,R> visitor_ptr(R (*)(T));

## Description

Constructs and returns a `visitor_ptr_t` adaptor over the given function.

Returns: | Returns a `visitor_ptr_t` visitor object that, when applied, invokes the given function.
Throws: | Will not throw. (Note, however, that the returned visitor object may throw when applied.)