:relfileprefix: ../../../../
[#boost-urls-grammar-recycled_ptr-2constructor-05e]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/grammar.adoc[pass:[grammar]]::xref:boost/urls/grammar/recycled_ptr.adoc[pass:[recycled_ptr]]::recycled_ptr


Constructor


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/grammar/recycled.hpp#L301[boost/url/grammar/recycled.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
recycled_ptr(xref:std.adoc[std]::nullptr_t) noexcept;
----

== Description


After construction, this is empty
and refers to a global recycle bin.

=== Example
[,cpp]
----
recycled_ptr< std::string > ps( nullptr );

// Acquire a string and put it into a known state
ps->acquire();
ps->clear();
----

=== Postconditions
[,cpp]
----
&this->bin() != nullptr && this->empty()
----

=== Exception Safety

Throws nothing.








== See Also


xref:boost/urls/grammar/recycled_ptr/acquire.adoc[acquire]
,
xref:boost/urls/grammar/recycled.adoc[recycled]
,
xref:boost/urls/grammar/recycled_ptr/release.adoc[release]
.



