:relfileprefix: ../../../
[#48B89671AEA050699387EAFF05B538D0DAC8096F]

= Function url_view_base::has_query

pass:v,q[Return true if a query is present]


== Synopsis

Declared in header `</boost/url/url_view_base.hpp#L1852[boost/url/url_view_base.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
bool
has_query() const noexcept;
----

== Description

pass:v,q[This function returns true if this] pass:v,q[contains a query. An empty query is]
pass:v,q[distinct from having no query.]

=== Example
[,cpp]
----
assert( url_view( "/sql?id=42&col=name&page-size=20" ).has_query() );
----

=== Complexity
pass:v,q[Constant.]

=== Exception Safety
pass:v,q[Throws nothing.]

=== BNF
[,cpp]
----
query           = *( pchar / "/" / "?" )

query-param     = key [ "=" value ]
query-params    = [ query-param ] *( "&" query-param )
----

=== Specification

* pass:v,q[://en.wikipedia.org/wiki/Query_string"]
pass:v,q[>Query string (Wikipedia)]



== Return Value

* `bool`