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</pre><pre class='rust '>
<span class='kw'>use</span> <span class='kw'>super</span>::{<span class='ident'>Timespec</span>, <span class='ident'>Tm</span>, <span class='ident'>at_utc</span>, <span class='ident'>ParseError</span>, <span class='ident'>NSEC_PER_SEC</span>};

<span class='doccomment'>/// Parses the time from the string according to the format string.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>strptime</span>(<span class='kw-2'>mut</span> <span class='ident'>s</span>: <span class='kw-2'>&amp;</span><span class='ident'>str</span>, <span class='ident'>format</span>: <span class='kw-2'>&amp;</span><span class='ident'>str</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Result</span><span class='op'>&lt;</span><span class='ident'>Tm</span>, <span class='ident'>ParseError</span><span class='op'>&gt;</span> {
    <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>tm</span> <span class='op'>=</span> <span class='ident'>Tm</span> {
        <span class='ident'>tm_sec</span>: <span class='number'>0</span>,
        <span class='ident'>tm_min</span>: <span class='number'>0</span>,
        <span class='ident'>tm_hour</span>: <span class='number'>0</span>,
        <span class='ident'>tm_mday</span>: <span class='number'>0</span>,
        <span class='ident'>tm_mon</span>: <span class='number'>0</span>,
        <span class='ident'>tm_year</span>: <span class='number'>0</span>,
        <span class='ident'>tm_wday</span>: <span class='number'>0</span>,
        <span class='ident'>tm_yday</span>: <span class='number'>0</span>,
        <span class='ident'>tm_isdst</span>: <span class='number'>0</span>,
        <span class='ident'>tm_utcoff</span>: <span class='number'>0</span>,
        <span class='ident'>tm_nsec</span>: <span class='number'>0</span>,
    };
    <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>chars</span> <span class='op'>=</span> <span class='ident'>format</span>.<span class='ident'>chars</span>();

    <span class='kw'>while</span> <span class='kw'>let</span> <span class='prelude-val'>Some</span>(<span class='ident'>ch</span>) <span class='op'>=</span> <span class='ident'>chars</span>.<span class='ident'>next</span>() {
        <span class='kw'>if</span> <span class='ident'>ch</span> <span class='op'>==</span> <span class='string'>&#39;%&#39;</span> {
            <span class='kw'>if</span> <span class='kw'>let</span> <span class='prelude-val'>Some</span>(<span class='ident'>ch</span>) <span class='op'>=</span> <span class='ident'>chars</span>.<span class='ident'>next</span>() {
                <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>parse_type</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>s</span>, <span class='ident'>ch</span>, <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>tm</span>));
            }
        } <span class='kw'>else</span> {
            <span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>parse_char</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>s</span>, <span class='ident'>ch</span>));
        }
    }

    <span class='prelude-val'>Ok</span>(<span class='ident'>tm</span>)
}

<span class='kw'>fn</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='kw-2'>&amp;</span><span class='ident'>str</span>, <span class='ident'>ch</span>: <span class='ident'>char</span>, <span class='ident'>tm</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>Tm</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Result</span><span class='op'>&lt;</span>(), <span class='ident'>ParseError</span><span class='op'>&gt;</span> {
    <span class='kw'>match</span> <span class='ident'>ch</span> {
        <span class='string'>&#39;A&#39;</span> <span class='op'>=&gt;</span> <span class='kw'>match</span> <span class='ident'>match_strs</span>(<span class='ident'>s</span>, <span class='kw-2'>&amp;</span>[(<span class='string'>&quot;Sunday&quot;</span>, <span class='number'>0</span>),
                                     (<span class='string'>&quot;Monday&quot;</span>, <span class='number'>1</span>),
                                     (<span class='string'>&quot;Tuesday&quot;</span>, <span class='number'>2</span>),
                                     (<span class='string'>&quot;Wednesday&quot;</span>, <span class='number'>3</span>),
                                     (<span class='string'>&quot;Thursday&quot;</span>, <span class='number'>4</span>),
                                     (<span class='string'>&quot;Friday&quot;</span>, <span class='number'>5</span>),
                                     (<span class='string'>&quot;Saturday&quot;</span>, <span class='number'>6</span>)]) {
            <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_wday</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidDay</span>)
        },
        <span class='string'>&#39;a&#39;</span> <span class='op'>=&gt;</span> <span class='kw'>match</span> <span class='ident'>match_strs</span>(<span class='ident'>s</span>, <span class='kw-2'>&amp;</span>[(<span class='string'>&quot;Sun&quot;</span>, <span class='number'>0</span>),
                                     (<span class='string'>&quot;Mon&quot;</span>, <span class='number'>1</span>),
                                     (<span class='string'>&quot;Tue&quot;</span>, <span class='number'>2</span>),
                                     (<span class='string'>&quot;Wed&quot;</span>, <span class='number'>3</span>),
                                     (<span class='string'>&quot;Thu&quot;</span>, <span class='number'>4</span>),
                                     (<span class='string'>&quot;Fri&quot;</span>, <span class='number'>5</span>),
                                     (<span class='string'>&quot;Sat&quot;</span>, <span class='number'>6</span>)]) {
            <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_wday</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidDay</span>)
        },
        <span class='string'>&#39;B&#39;</span> <span class='op'>=&gt;</span> <span class='kw'>match</span> <span class='ident'>match_strs</span>(<span class='ident'>s</span>, <span class='kw-2'>&amp;</span>[(<span class='string'>&quot;January&quot;</span>, <span class='number'>0</span>),
                                     (<span class='string'>&quot;February&quot;</span>, <span class='number'>1</span>),
                                     (<span class='string'>&quot;March&quot;</span>, <span class='number'>2</span>),
                                     (<span class='string'>&quot;April&quot;</span>, <span class='number'>3</span>),
                                     (<span class='string'>&quot;May&quot;</span>, <span class='number'>4</span>),
                                     (<span class='string'>&quot;June&quot;</span>, <span class='number'>5</span>),
                                     (<span class='string'>&quot;July&quot;</span>, <span class='number'>6</span>),
                                     (<span class='string'>&quot;August&quot;</span>, <span class='number'>7</span>),
                                     (<span class='string'>&quot;September&quot;</span>, <span class='number'>8</span>),
                                     (<span class='string'>&quot;October&quot;</span>, <span class='number'>9</span>),
                                     (<span class='string'>&quot;November&quot;</span>, <span class='number'>10</span>),
                                     (<span class='string'>&quot;December&quot;</span>, <span class='number'>11</span>)]) {
            <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_mon</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidMonth</span>)
        },
        <span class='string'>&#39;b&#39;</span> <span class='op'>|</span> <span class='string'>&#39;h&#39;</span> <span class='op'>=&gt;</span> <span class='kw'>match</span> <span class='ident'>match_strs</span>(<span class='ident'>s</span>, <span class='kw-2'>&amp;</span>[(<span class='string'>&quot;Jan&quot;</span>, <span class='number'>0</span>),
                                           (<span class='string'>&quot;Feb&quot;</span>, <span class='number'>1</span>),
                                           (<span class='string'>&quot;Mar&quot;</span>, <span class='number'>2</span>),
                                           (<span class='string'>&quot;Apr&quot;</span>, <span class='number'>3</span>),
                                           (<span class='string'>&quot;May&quot;</span>, <span class='number'>4</span>),
                                           (<span class='string'>&quot;Jun&quot;</span>, <span class='number'>5</span>),
                                           (<span class='string'>&quot;Jul&quot;</span>, <span class='number'>6</span>),
                                           (<span class='string'>&quot;Aug&quot;</span>, <span class='number'>7</span>),
                                           (<span class='string'>&quot;Sep&quot;</span>, <span class='number'>8</span>),
                                           (<span class='string'>&quot;Oct&quot;</span>, <span class='number'>9</span>),
                                           (<span class='string'>&quot;Nov&quot;</span>, <span class='number'>10</span>),
                                           (<span class='string'>&quot;Dec&quot;</span>, <span class='number'>11</span>)]) {
            <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_mon</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidMonth</span>)
        },
        <span class='string'>&#39;C&#39;</span> <span class='op'>=&gt;</span> <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>, <span class='number'>0</span>, <span class='number'>99</span>) {
            <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_year</span> <span class='op'>+=</span> (<span class='ident'>v</span> <span class='op'>*</span> <span class='number'>100</span>) <span class='op'>-</span> <span class='number'>1900</span>; <span class='prelude-val'>Ok</span>(()) }
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidYear</span>)
        },
        <span class='string'>&#39;c&#39;</span> <span class='op'>=&gt;</span> {
            <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;a&#39;</span>, <span class='ident'>tm</span>)
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39; &#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;b&#39;</span>, <span class='ident'>tm</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39; &#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;e&#39;</span>, <span class='ident'>tm</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39; &#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;T&#39;</span>, <span class='ident'>tm</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39; &#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;Y&#39;</span>, <span class='ident'>tm</span>))
        }
        <span class='string'>&#39;D&#39;</span> <span class='op'>|</span> <span class='string'>&#39;x&#39;</span> <span class='op'>=&gt;</span> {
            <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;m&#39;</span>, <span class='ident'>tm</span>)
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;/&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;d&#39;</span>, <span class='ident'>tm</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;/&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;y&#39;</span>, <span class='ident'>tm</span>))
        }
        <span class='string'>&#39;d&#39;</span> <span class='op'>=&gt;</span> <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>, <span class='number'>1</span>, <span class='number'>31</span>) {
            <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_mday</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidDayOfMonth</span>)
        },
        <span class='string'>&#39;e&#39;</span> <span class='op'>=&gt;</span> <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>true</span>, <span class='number'>1</span>, <span class='number'>31</span>) {
            <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_mday</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidDayOfMonth</span>)
        },
        <span class='string'>&#39;f&#39;</span> <span class='op'>=&gt;</span> {
            <span class='ident'>tm</span>.<span class='ident'>tm_nsec</span> <span class='op'>=</span> <span class='ident'>match_fractional_seconds</span>(<span class='ident'>s</span>);
            <span class='prelude-val'>Ok</span>(())
        }
        <span class='string'>&#39;F&#39;</span> <span class='op'>=&gt;</span> {
            <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;Y&#39;</span>, <span class='ident'>tm</span>)
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;-&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;m&#39;</span>, <span class='ident'>tm</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;-&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;d&#39;</span>, <span class='ident'>tm</span>))
        }
        <span class='string'>&#39;H&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>, <span class='number'>0</span>, <span class='number'>23</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_hour</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidHour</span>)
            }
        }
        <span class='string'>&#39;I&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>, <span class='number'>1</span>, <span class='number'>12</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_hour</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>v</span> <span class='op'>==</span> <span class='number'>12</span> { <span class='number'>0</span> } <span class='kw'>else</span> { <span class='ident'>v</span> }; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidHour</span>)
            }
        }
        <span class='string'>&#39;j&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>3</span>, <span class='bool-val'>false</span>, <span class='number'>1</span>, <span class='number'>366</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_yday</span> <span class='op'>=</span> <span class='ident'>v</span> <span class='op'>-</span> <span class='number'>1</span>; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidDayOfYear</span>)
            }
        }
        <span class='string'>&#39;k&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>true</span>, <span class='number'>0</span>, <span class='number'>23</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_hour</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidHour</span>)
            }
        }
        <span class='string'>&#39;l&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>true</span>, <span class='number'>1</span>, <span class='number'>12</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_hour</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>v</span> <span class='op'>==</span> <span class='number'>12</span> { <span class='number'>0</span> } <span class='kw'>else</span> { <span class='ident'>v</span> }; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidHour</span>)
            }
        }
        <span class='string'>&#39;M&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>, <span class='number'>0</span>, <span class='number'>59</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_min</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidMinute</span>)
            }
        }
        <span class='string'>&#39;m&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>, <span class='number'>1</span>, <span class='number'>12</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_mon</span> <span class='op'>=</span> <span class='ident'>v</span> <span class='op'>-</span> <span class='number'>1</span>; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidMonth</span>)
            }
        }
        <span class='string'>&#39;n&#39;</span> <span class='op'>=&gt;</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;\n&#39;</span>),
        <span class='string'>&#39;P&#39;</span> <span class='op'>=&gt;</span> <span class='kw'>match</span> <span class='ident'>match_strs</span>(<span class='ident'>s</span>, <span class='kw-2'>&amp;</span>[(<span class='string'>&quot;am&quot;</span>, <span class='number'>0</span>), (<span class='string'>&quot;pm&quot;</span>, <span class='number'>12</span>)]) {
            <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_hour</span> <span class='op'>+=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidHour</span>)
        },
        <span class='string'>&#39;p&#39;</span> <span class='op'>=&gt;</span> <span class='kw'>match</span> <span class='ident'>match_strs</span>(<span class='ident'>s</span>, <span class='kw-2'>&amp;</span>[(<span class='string'>&quot;AM&quot;</span>, <span class='number'>0</span>), (<span class='string'>&quot;PM&quot;</span>, <span class='number'>12</span>)]) {
            <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_hour</span> <span class='op'>+=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidHour</span>)
        },
        <span class='string'>&#39;R&#39;</span> <span class='op'>=&gt;</span> {
            <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;H&#39;</span>, <span class='ident'>tm</span>)
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;:&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;M&#39;</span>, <span class='ident'>tm</span>))
        }
        <span class='string'>&#39;r&#39;</span> <span class='op'>=&gt;</span> {
            <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;I&#39;</span>, <span class='ident'>tm</span>)
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;:&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;M&#39;</span>, <span class='ident'>tm</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;:&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;S&#39;</span>, <span class='ident'>tm</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39; &#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;p&#39;</span>, <span class='ident'>tm</span>))
        }
        <span class='string'>&#39;s&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_i64</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>18</span>, <span class='bool-val'>false</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> {
                    <span class='op'>*</span><span class='ident'>tm</span> <span class='op'>=</span> <span class='ident'>at_utc</span>(<span class='ident'>Timespec</span>::<span class='ident'>new</span>(<span class='ident'>v</span>, <span class='number'>0</span>));
                    <span class='prelude-val'>Ok</span>(())
                },
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidSecondsSinceEpoch</span>)
            }
        }
        <span class='string'>&#39;S&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>, <span class='number'>0</span>, <span class='number'>60</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_sec</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidSecond</span>)
            }
        }
        <span class='comment'>//&#39;s&#39; {}</span>
        <span class='string'>&#39;T&#39;</span> <span class='op'>|</span> <span class='string'>&#39;X&#39;</span> <span class='op'>=&gt;</span> {
            <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;H&#39;</span>, <span class='ident'>tm</span>)
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;:&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;M&#39;</span>, <span class='ident'>tm</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;:&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;S&#39;</span>, <span class='ident'>tm</span>))
        }
        <span class='string'>&#39;t&#39;</span> <span class='op'>=&gt;</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;\t&#39;</span>),
        <span class='string'>&#39;u&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='bool-val'>false</span>, <span class='number'>1</span>, <span class='number'>7</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_wday</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>v</span> <span class='op'>==</span> <span class='number'>7</span> { <span class='number'>0</span> } <span class='kw'>else</span> { <span class='ident'>v</span> }; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidDayOfWeek</span>)
            }
        }
        <span class='string'>&#39;v&#39;</span> <span class='op'>=&gt;</span> {
            <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;e&#39;</span>, <span class='ident'>tm</span>)
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;-&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;b&#39;</span>, <span class='ident'>tm</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;-&#39;</span>))
                .<span class='ident'>and_then</span>(<span class='op'>|</span>()<span class='op'>|</span> <span class='ident'>parse_type</span>(<span class='ident'>s</span>, <span class='string'>&#39;Y&#39;</span>, <span class='ident'>tm</span>))
        }
        <span class='comment'>//&#39;W&#39; {}</span>
        <span class='string'>&#39;w&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='bool-val'>false</span>, <span class='number'>0</span>, <span class='number'>6</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_wday</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidDayOfWeek</span>)
            }
        }
        <span class='string'>&#39;Y&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits</span>(<span class='ident'>s</span>, <span class='number'>4</span>, <span class='number'>4</span>, <span class='bool-val'>false</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_year</span> <span class='op'>=</span> <span class='ident'>v</span> <span class='op'>-</span> <span class='number'>1900</span>; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidYear</span>)
            }
        }
        <span class='string'>&#39;y&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>match</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>s</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>, <span class='number'>0</span>, <span class='number'>99</span>) {
                <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> { <span class='ident'>tm</span>.<span class='ident'>tm_year</span> <span class='op'>=</span> <span class='ident'>v</span>; <span class='prelude-val'>Ok</span>(()) }
                <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidYear</span>)
            }
        }
        <span class='string'>&#39;Z&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>if</span> <span class='ident'>match_str</span>(<span class='ident'>s</span>, <span class='string'>&quot;UTC&quot;</span>) <span class='op'>||</span> <span class='ident'>match_str</span>(<span class='ident'>s</span>, <span class='string'>&quot;GMT&quot;</span>) {
                <span class='ident'>tm</span>.<span class='ident'>tm_utcoff</span> <span class='op'>=</span> <span class='number'>0</span>;
                <span class='prelude-val'>Ok</span>(())
            } <span class='kw'>else</span> {
                <span class='comment'>// It&#39;s odd, but to maintain compatibility with c&#39;s</span>
                <span class='comment'>// strptime we ignore the timezone.</span>
                <span class='kw'>for</span> (<span class='ident'>i</span>, <span class='ident'>ch</span>) <span class='kw'>in</span> <span class='ident'>s</span>.<span class='ident'>char_indices</span>() {
                    <span class='kw'>if</span> <span class='ident'>ch</span> <span class='op'>==</span> <span class='string'>&#39; &#39;</span> {
                        <span class='op'>*</span><span class='ident'>s</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='ident'>s</span>[<span class='ident'>i</span>..];
                        <span class='kw'>return</span> <span class='prelude-val'>Ok</span>(())
                    }
                }
                <span class='op'>*</span><span class='ident'>s</span> <span class='op'>=</span> <span class='string'>&quot;&quot;</span>;
                <span class='prelude-val'>Ok</span>(())
            }
        }
        <span class='string'>&#39;z&#39;</span> <span class='op'>=&gt;</span> {
            <span class='kw'>if</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;Z&#39;</span>).<span class='ident'>is_ok</span>() {
                <span class='ident'>tm</span>.<span class='ident'>tm_utcoff</span> <span class='op'>=</span> <span class='number'>0</span>;
                <span class='prelude-val'>Ok</span>(())
            } <span class='kw'>else</span> {
                <span class='kw'>let</span> <span class='ident'>sign</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;+&#39;</span>).<span class='ident'>is_ok</span>() {<span class='number'>1</span>}
                           <span class='kw'>else</span> <span class='kw'>if</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;-&#39;</span>).<span class='ident'>is_ok</span>() {<span class='op'>-</span><span class='number'>1</span>}
                           <span class='kw'>else</span> { <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidZoneOffset</span>) };

                <span class='kw'>let</span> <span class='ident'>hours</span>;
                <span class='kw'>let</span> <span class='ident'>minutes</span>;

                <span class='kw'>match</span> <span class='ident'>match_digits</span>(<span class='ident'>s</span>, <span class='number'>2</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>) {
                    <span class='prelude-val'>Some</span>(<span class='ident'>h</span>) <span class='op'>=&gt;</span> <span class='ident'>hours</span> <span class='op'>=</span> <span class='ident'>h</span>,
                    <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidZoneOffset</span>)
                }

                <span class='comment'>// consume the colon if its present,</span>
                <span class='comment'>// just ignore it otherwise</span>
                <span class='kw'>let</span> _ <span class='op'>=</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;:&#39;</span>);

                <span class='kw'>match</span> <span class='ident'>match_digits</span>(<span class='ident'>s</span>, <span class='number'>2</span>, <span class='number'>2</span>, <span class='bool-val'>false</span>) {
                    <span class='prelude-val'>Some</span>(<span class='ident'>m</span>) <span class='op'>=&gt;</span> <span class='ident'>minutes</span> <span class='op'>=</span> <span class='ident'>m</span>,
                    <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='kw'>return</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidZoneOffset</span>)
                }

                <span class='ident'>tm</span>.<span class='ident'>tm_utcoff</span> <span class='op'>=</span> <span class='ident'>sign</span> <span class='op'>*</span> (<span class='ident'>hours</span> <span class='op'>*</span> <span class='number'>60</span> <span class='op'>*</span> <span class='number'>60</span> <span class='op'>+</span> <span class='ident'>minutes</span> <span class='op'>*</span> <span class='number'>60</span>);
                <span class='prelude-val'>Ok</span>(())
            }
        }
        <span class='string'>&#39;%&#39;</span> <span class='op'>=&gt;</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>, <span class='string'>&#39;%&#39;</span>),
        <span class='ident'>ch</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidFormatSpecifier</span>(<span class='ident'>ch</span>))
    }
}


<span class='kw'>fn</span> <span class='ident'>match_str</span>(<span class='ident'>s</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='kw-2'>&amp;</span><span class='ident'>str</span>, <span class='ident'>needle</span>: <span class='kw-2'>&amp;</span><span class='ident'>str</span>) <span class='op'>-&gt;</span> <span class='ident'>bool</span> {
    <span class='kw'>if</span> <span class='ident'>s</span>.<span class='ident'>starts_with</span>(<span class='ident'>needle</span>) {
        <span class='op'>*</span><span class='ident'>s</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='ident'>s</span>[<span class='ident'>needle</span>.<span class='ident'>len</span>()..];
        <span class='bool-val'>true</span>
    } <span class='kw'>else</span> {
        <span class='bool-val'>false</span>
    }
}

<span class='kw'>fn</span> <span class='ident'>match_strs</span>(<span class='ident'>ss</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='kw-2'>&amp;</span><span class='ident'>str</span>, <span class='ident'>strs</span>: <span class='kw-2'>&amp;</span>[(<span class='kw-2'>&amp;</span><span class='ident'>str</span>, <span class='ident'>i32</span>)]) <span class='op'>-&gt;</span> <span class='prelude-ty'>Option</span><span class='op'>&lt;</span><span class='ident'>i32</span><span class='op'>&gt;</span> {
    <span class='kw'>for</span> <span class='kw-2'>&amp;</span>(<span class='ident'>needle</span>, <span class='ident'>value</span>) <span class='kw'>in</span> <span class='ident'>strs</span>.<span class='ident'>iter</span>() {
        <span class='kw'>if</span> <span class='ident'>match_str</span>(<span class='ident'>ss</span>, <span class='ident'>needle</span>) {
            <span class='kw'>return</span> <span class='prelude-val'>Some</span>(<span class='ident'>value</span>)
        }
    }
    <span class='prelude-val'>None</span>
}

<span class='kw'>fn</span> <span class='ident'>match_digits</span>(<span class='ident'>ss</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='kw-2'>&amp;</span><span class='ident'>str</span>, <span class='ident'>min_digits</span> : <span class='ident'>usize</span>, <span class='ident'>max_digits</span>: <span class='ident'>usize</span>, <span class='ident'>ws</span>: <span class='ident'>bool</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Option</span><span class='op'>&lt;</span><span class='ident'>i32</span><span class='op'>&gt;</span> {
    <span class='kw'>match</span> <span class='ident'>match_digits_i64</span>(<span class='ident'>ss</span>, <span class='ident'>min_digits</span>, <span class='ident'>max_digits</span>, <span class='ident'>ws</span>) {
        <span class='prelude-val'>Some</span>(<span class='ident'>v</span>) <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>(<span class='ident'>v</span> <span class='kw'>as</span> <span class='ident'>i32</span>),
        <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>None</span>
    }
}

<span class='kw'>fn</span> <span class='ident'>match_digits_i64</span>(<span class='ident'>ss</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='kw-2'>&amp;</span><span class='ident'>str</span>, <span class='ident'>min_digits</span> : <span class='ident'>usize</span>, <span class='ident'>max_digits</span>: <span class='ident'>usize</span>, <span class='ident'>ws</span>: <span class='ident'>bool</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Option</span><span class='op'>&lt;</span><span class='ident'>i64</span><span class='op'>&gt;</span> {
    <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>value</span> : <span class='ident'>i64</span> <span class='op'>=</span> <span class='number'>0</span>;
    <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>n</span> <span class='op'>=</span> <span class='number'>0</span>;
    <span class='kw'>if</span> <span class='ident'>ws</span> {
        <span class='kw'>let</span> <span class='ident'>s2</span> <span class='op'>=</span> <span class='ident'>ss</span>.<span class='ident'>trim_left_matches</span>(<span class='string'>&quot; &quot;</span>);
        <span class='ident'>n</span> <span class='op'>=</span> <span class='ident'>ss</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='ident'>s2</span>.<span class='ident'>len</span>();
        <span class='kw'>if</span> <span class='ident'>n</span> <span class='op'>&gt;</span> <span class='ident'>max_digits</span> { <span class='kw'>return</span> <span class='prelude-val'>None</span> }
    }
    <span class='kw'>let</span> <span class='ident'>chars</span> <span class='op'>=</span> <span class='ident'>ss</span>[<span class='ident'>n</span>..].<span class='ident'>char_indices</span>();
    <span class='kw'>for</span> (_, <span class='ident'>ch</span>) <span class='kw'>in</span> <span class='ident'>chars</span>.<span class='ident'>take</span>(<span class='ident'>max_digits</span> <span class='op'>-</span> <span class='ident'>n</span>) {
        <span class='kw'>match</span> <span class='ident'>ch</span> {
            <span class='string'>&#39;0&#39;</span> ... <span class='string'>&#39;9&#39;</span> <span class='op'>=&gt;</span> <span class='ident'>value</span> <span class='op'>=</span> <span class='ident'>value</span> <span class='op'>*</span> <span class='number'>10</span> <span class='op'>+</span> (<span class='ident'>ch</span> <span class='kw'>as</span> <span class='ident'>i64</span> <span class='op'>-</span> <span class='string'>&#39;0&#39;</span> <span class='kw'>as</span> <span class='ident'>i64</span>),
            _ <span class='op'>=&gt;</span> <span class='kw'>break</span>,
        }
        <span class='ident'>n</span> <span class='op'>+=</span> <span class='number'>1</span>;
    }

    <span class='kw'>if</span> <span class='ident'>n</span> <span class='op'>&gt;=</span> <span class='ident'>min_digits</span> <span class='op'>&amp;&amp;</span> <span class='ident'>n</span> <span class='op'>&lt;=</span> <span class='ident'>max_digits</span> {
        <span class='op'>*</span><span class='ident'>ss</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='ident'>ss</span>[<span class='ident'>n</span>..];
        <span class='prelude-val'>Some</span>(<span class='ident'>value</span>)
    } <span class='kw'>else</span> {
        <span class='prelude-val'>None</span>
    }
}

<span class='kw'>fn</span> <span class='ident'>match_fractional_seconds</span>(<span class='ident'>ss</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='kw-2'>&amp;</span><span class='ident'>str</span>) <span class='op'>-&gt;</span> <span class='ident'>i32</span> {
    <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>value</span> <span class='op'>=</span> <span class='number'>0</span>;
    <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>multiplier</span> <span class='op'>=</span> <span class='ident'>NSEC_PER_SEC</span> <span class='op'>/</span> <span class='number'>10</span>;

    <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>chars</span> <span class='op'>=</span> <span class='ident'>ss</span>.<span class='ident'>char_indices</span>();
    <span class='kw'>let</span> <span class='ident'>orig</span> <span class='op'>=</span> <span class='op'>*</span><span class='ident'>ss</span>;
    <span class='kw'>for</span> (<span class='ident'>i</span>, <span class='ident'>ch</span>) <span class='kw'>in</span> <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>chars</span> {
        <span class='op'>*</span><span class='ident'>ss</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='ident'>orig</span>[<span class='ident'>i</span>..];
        <span class='kw'>match</span> <span class='ident'>ch</span> {
            <span class='string'>&#39;0&#39;</span> ... <span class='string'>&#39;9&#39;</span> <span class='op'>=&gt;</span> {
                <span class='comment'>// This will drop digits after the nanoseconds place</span>
                <span class='kw'>let</span> <span class='ident'>digit</span> <span class='op'>=</span> <span class='ident'>ch</span> <span class='kw'>as</span> <span class='ident'>i32</span> <span class='op'>-</span> <span class='string'>&#39;0&#39;</span> <span class='kw'>as</span> <span class='ident'>i32</span>;
                <span class='ident'>value</span> <span class='op'>+=</span> <span class='ident'>digit</span> <span class='op'>*</span> <span class='ident'>multiplier</span>;
                <span class='ident'>multiplier</span> <span class='op'>/=</span> <span class='number'>10</span>;
            }
            _ <span class='op'>=&gt;</span> <span class='kw'>break</span>
        }
    }

    <span class='ident'>value</span>
}

<span class='kw'>fn</span> <span class='ident'>match_digits_in_range</span>(<span class='ident'>ss</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='kw-2'>&amp;</span><span class='ident'>str</span>,
                         <span class='ident'>min_digits</span> : <span class='ident'>usize</span>, <span class='ident'>max_digits</span> : <span class='ident'>usize</span>,
                         <span class='ident'>ws</span>: <span class='ident'>bool</span>, <span class='ident'>min</span>: <span class='ident'>i32</span>, <span class='ident'>max</span>: <span class='ident'>i32</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Option</span><span class='op'>&lt;</span><span class='ident'>i32</span><span class='op'>&gt;</span> {
    <span class='kw'>let</span> <span class='ident'>before</span> <span class='op'>=</span> <span class='op'>*</span><span class='ident'>ss</span>;
    <span class='kw'>match</span> <span class='ident'>match_digits</span>(<span class='ident'>ss</span>, <span class='ident'>min_digits</span>, <span class='ident'>max_digits</span>, <span class='ident'>ws</span>) {
        <span class='prelude-val'>Some</span>(<span class='ident'>val</span>) <span class='kw'>if</span> <span class='ident'>val</span> <span class='op'>&gt;=</span> <span class='ident'>min</span> <span class='op'>&amp;&amp;</span> <span class='ident'>val</span> <span class='op'>&lt;=</span> <span class='ident'>max</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>(<span class='ident'>val</span>),
        _ <span class='op'>=&gt;</span> { <span class='op'>*</span><span class='ident'>ss</span> <span class='op'>=</span> <span class='ident'>before</span>; <span class='prelude-val'>None</span> }
    }
}

<span class='kw'>fn</span> <span class='ident'>parse_char</span>(<span class='ident'>s</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='kw-2'>&amp;</span><span class='ident'>str</span>, <span class='ident'>c</span>: <span class='ident'>char</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Result</span><span class='op'>&lt;</span>(), <span class='ident'>ParseError</span><span class='op'>&gt;</span> {
    <span class='kw'>match</span> <span class='ident'>s</span>.<span class='ident'>char_indices</span>().<span class='ident'>next</span>() {
        <span class='prelude-val'>Some</span>((<span class='ident'>i</span>, <span class='ident'>c2</span>)) <span class='op'>=&gt;</span> {
            <span class='kw'>if</span> <span class='ident'>c</span> <span class='op'>==</span> <span class='ident'>c2</span> {
                <span class='op'>*</span><span class='ident'>s</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='ident'>s</span>[<span class='ident'>i</span> <span class='op'>+</span> <span class='ident'>c2</span>.<span class='ident'>len_utf8</span>()..];
                <span class='prelude-val'>Ok</span>(())
            } <span class='kw'>else</span> {
                <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>UnexpectedCharacter</span>(<span class='ident'>c</span>, <span class='ident'>c2</span>))
            }
        }
        <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>Err</span>(<span class='ident'>ParseError</span>::<span class='ident'>InvalidTime</span>),
    }
}
</pre>
</section>
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                </dl>
            </div>

            <div class="infos">
                <h2>Search Tricks</h2>

                <p>
                    Prefix searches with a type followed by a colon (e.g.
                    <code>fn:</code>) to restrict the search to a given type.
                </p>

                <p>
                    Accepted types are: <code>fn</code>, <code>mod</code>,
                    <code>struct</code>, <code>enum</code>,
                    <code>trait</code>, <code>type</code>, <code>macro</code>,
                    and <code>const</code>.
                </p>

                <p>
                    Search functions by type signature (e.g.
                    <code>vec -> usize</code> or <code>* -> vec</code>)
                </p>
            </div>
        </div>
    </aside>

    

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