Function url_view_base::has_query

Return true if a query is present

Synopsis

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

bool
has_query() const noexcept;

Description

This function returns true if this contains a query. An empty query is distinct from having no query.

Example

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

Complexity

Constant.

Exception Safety

Throws nothing.

BNF

query           = *( pchar / "/" / "?" )

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

Specification

  • link:https://datatracker.ietf.org/doc/html/rfc3986#section-3.4 >3.4. Query (rfc3986)</a> @li <a href=[://en.wikipedia.org/wiki/Query_string" >Query string (Wikipedia)]