[#5624456C086AC9FCEBCB6A8C414C4A252BEC1105]

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        <h2>Function string_to_scheme</h2>
        <p><span>Return the known scheme for a non-normalized string, if known</span></p>


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        <h3>Synopsis</h3>
        <div>
            <code>
                            </code>
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        <pre class="source-code cpp">
            scheme
string_to_scheme(core::string_view s) noexcept;
        </pre>
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        <h3>Description</h3>
        <p><span>If the string does not identify a known</span> <span>scheme, the value</span>
<span>scheme::unknown</span>
<span>is</span>
<span>returned.</span></p>

<h3>BNF</h3>
<code>
scheme      = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
</code>
<h3>Specification</h3>
<li><a href="https://datatracker.ietf.org/doc/html/rfc3986#section-3.1">3.1. Scheme (rfc3986)</a></li>

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