:relfileprefix: ../../../
[#boost-urls-params_encoded_base-buffer]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/params_encoded_base.adoc[pass:[params_encoded_base]]::buffer


Return the query corresponding to these params


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_encoded_base.hpp#L176[boost/url/params_encoded_base.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
xref:boost/urls/pct_string_view.adoc[pct_string_view]
buffer() const noexcept;
----

== Description


This function returns the query string
referenced by the container.
The returned string may contain
percent escapes.

=== Example
[,cpp]
----
assert( url_view( "?first=John&last=Doe" ).encoded_params().buffer() == "first=John&last=Doe" );
----

=== Complexity

Constant.

=== Exception Safety

Throws nothing.

=== BNF
[,cpp]
----
query-params    = query-param *( "&" query-param )
query-param     = key [ "=" value ]
key             = *qpchar
value           = *( qpchar / "=" )
----

=== Specification

* link:https://en.wikipedia.org/wiki/Query_string[Query string (Wikipedia)]