:relfileprefix: ../../../../
[#boost-urls-grammar-string_view_base-starts_with-0b]

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


Return true if a matching prefix exists


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/grammar/string_view_base.hpp#L429[boost/url/grammar/string_view_base.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
constexpr
bool
starts_with(char x) const noexcept;
----

== Description


See `core::string_view::starts_with`