[#boost-urls-grammar-RangeRule]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/grammar.adoc[grammar]::RangeRule
:relfileprefix: ../../../
:mrdocs:

== Synopsis

Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/grammar/range_rule.hpp#Lundefined[boost/url/grammar/range_rule.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class T>
concept RangeRule = requires (T r, char const*& it, char const* end)
    {
        typename T::value_type;
        { r.first(it, end) } ‐> std::same_as<system::result<typename T::value_type>>;
        { r.next(it, end) } ‐> std::same_as<system::result<typename T::value_type>>;
    };
----


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