boost::urls::url_view_base::host_ipvfuture :: Boost Libraries Documentation

# boost::urls::url_view_base::host_ipvfuture

Return the host IPvFuture address

## Synopsis

Declared in `<boost/url/url_view_base.hpp>`

    core::string_view
    host_ipvfuture() const noexcept;

## Description

If the host type is `host_type::ipvfuture`, this function returns the address as a string. Otherwise, if the host type is not an IPvFuture address, it returns an empty string.

## Example

    assert( url_view( "http://[v1fe.d:9]/index.htm" ).host_ipvfuture() == "v1fe.d:9" );

## Complexity

Constant.

## Exception Safety

Throws nothing.

## BNF

    IPvFuture  = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" )

## Specification

- https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.2

## Return Value

The IPvFuture address as a string.

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