:relfileprefix: ../../../
[#boost-urls-decode_view-starts_with-01]

== xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/decode_view.adoc[pass:[decode_view]]::starts_with


Checks if the string begins with the given prefix


=== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/decode_view.hpp#L366[boost/url/decode_view.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
bool
starts_with(core::string_view s) const noexcept;
----

=== Description

[,cpp]
----
assert( decode_view( "Program%20Files" ).starts_with("Program") );
----

=== Linear.

=== Throws nothing.