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</pre><div class="example-wrap"><pre class="rust ">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::{<span class="ident">BTreeMap</span>, <span class="ident">HashSet</span>, <span class="ident">VecDeque</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;

<span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Serialize</span>};

<span class="kw">use</span> <span class="ident">abstutil</span>::{
    <span class="ident">deserialize_btreemap</span>, <span class="ident">deserialize_usize</span>, <span class="ident">serialize_btreemap</span>, <span class="ident">serialize_usize</span>, <span class="ident">Tags</span>,
};
<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Distance</span>, <span class="ident">PolyLine</span>, <span class="ident">Polygon</span>, <span class="ident">Pt2D</span>};

<span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">osm</span>, <span class="ident">LaneID</span>, <span class="ident">Map</span>, <span class="ident">PathConstraints</span>, <span class="ident">Position</span>};

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">BuildingID</span>(
    <span class="attribute">#[<span class="ident">serde</span>(
        <span class="ident">serialize_with</span> <span class="op">=</span> <span class="string">&quot;serialize_usize&quot;</span>,
        <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="string">&quot;deserialize_usize&quot;</span>
    )]</span>
    <span class="kw">pub</span> <span class="ident">usize</span>,
);

<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">BuildingID</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
        <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">&quot;Building #{}&quot;</span>, <span class="self">self</span>.<span class="number">0</span>)
    }
}

<span class="doccomment">/// A building has connections to the road and sidewalk, may contain commercial amenities, and have</span>
<span class="doccomment">/// off-street parking.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Building</span> {
    <span class="kw">pub</span> <span class="ident">id</span>: <span class="ident">BuildingID</span>,
    <span class="kw">pub</span> <span class="ident">polygon</span>: <span class="ident">Polygon</span>,
    <span class="kw">pub</span> <span class="ident">levels</span>: <span class="ident">f64</span>,
    <span class="kw">pub</span> <span class="ident">address</span>: <span class="ident">String</span>,
    <span class="kw">pub</span> <span class="ident">name</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">NamePerLanguage</span><span class="op">&gt;</span>,
    <span class="kw">pub</span> <span class="ident">orig_id</span>: <span class="ident">osm</span>::<span class="ident">OsmID</span>,
    <span class="doccomment">/// Where a text label should be centered to have the best chances of being contained within</span>
    <span class="doccomment">/// the polygon.</span>
    <span class="kw">pub</span> <span class="ident">label_center</span>: <span class="ident">Pt2D</span>,
    <span class="kw">pub</span> <span class="ident">amenities</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Amenity</span><span class="op">&gt;</span>,
    <span class="kw">pub</span> <span class="ident">bldg_type</span>: <span class="ident">BuildingType</span>,
    <span class="kw">pub</span> <span class="ident">parking</span>: <span class="ident">OffstreetParking</span>,
    <span class="doccomment">/// Depending on options while importing, these might be empty, to save file space.</span>
    <span class="kw">pub</span> <span class="ident">osm_tags</span>: <span class="ident">Tags</span>,

    <span class="doccomment">/// The building&#39;s connection for pedestrians is immutable. For cars and bikes, it can change</span>
    <span class="doccomment">/// based on map edits, so don&#39;t cache it.</span>
    <span class="kw">pub</span> <span class="ident">sidewalk_pos</span>: <span class="ident">Position</span>,
    <span class="doccomment">/// Goes from building to sidewalk</span>
    <span class="kw">pub</span> <span class="ident">driveway_geom</span>: <span class="ident">PolyLine</span>,
}

<span class="doccomment">/// A business located inside a building.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Debug</span>, <span class="ident">Clone</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Amenity</span> {
    <span class="kw">pub</span> <span class="ident">names</span>: <span class="ident">NamePerLanguage</span>,
    <span class="doccomment">/// This is the specific amenity listed in OSM, not the more general `AmenityType` category.</span>
    <span class="kw">pub</span> <span class="ident">amenity_type</span>: <span class="ident">String</span>,
    <span class="doccomment">/// Depending on options while importing, these might be empty, to save file space.</span>
    <span class="kw">pub</span> <span class="ident">osm_tags</span>: <span class="ident">Tags</span>,
}

<span class="doccomment">/// Represent no parking as Private(0, false).</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Clone</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">OffstreetParking</span> {
    <span class="doccomment">/// (Name, spots)</span>
    <span class="ident">PublicGarage</span>(<span class="ident">String</span>, <span class="ident">usize</span>),
    <span class="doccomment">/// (Spots, explicitly tagged as a garage)</span>
    <span class="ident">Private</span>(<span class="ident">usize</span>, <span class="ident">bool</span>),
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">BuildingType</span> {
    <span class="ident">Residential</span> {
        <span class="ident">num_residents</span>: <span class="ident">usize</span>,
        <span class="ident">num_housing_units</span>: <span class="ident">usize</span>,
    },
    <span class="doccomment">/// An estimated number of residents, workers</span>
    <span class="ident">ResidentialCommercial</span>(<span class="ident">usize</span>, <span class="ident">usize</span>),
    <span class="doccomment">/// An estimated number of workers</span>
    <span class="ident">Commercial</span>(<span class="ident">usize</span>),
    <span class="ident">Empty</span>,
}

<span class="kw">impl</span> <span class="ident">BuildingType</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">has_residents</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">BuildingType</span>::<span class="ident">Residential</span> { .. } <span class="op">|</span> <span class="ident">BuildingType</span>::<span class="ident">ResidentialCommercial</span>(<span class="kw">_</span>, <span class="kw">_</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="bool-val">true</span>,
            <span class="ident">BuildingType</span>::<span class="ident">Commercial</span>(<span class="kw">_</span>) <span class="op">|</span> <span class="ident">BuildingType</span>::<span class="ident">Empty</span> <span class="op">=</span><span class="op">&gt;</span> <span class="bool-val">false</span>,
        }
    }
}

<span class="doccomment">/// None corresponds to the native name</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Clone</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">NamePerLanguage</span>(
    <span class="attribute">#[<span class="ident">serde</span>(
        <span class="ident">serialize_with</span> <span class="op">=</span> <span class="string">&quot;serialize_btreemap&quot;</span>,
        <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="string">&quot;deserialize_btreemap&quot;</span>
    )]</span>
    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">BTreeMap</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>, <span class="ident">String</span><span class="op">&gt;</span>,
);

<span class="kw">impl</span> <span class="ident">NamePerLanguage</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">lang</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">String</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="ident">String</span> {
        <span class="comment">// TODO Can we avoid this clone?</span>
        <span class="kw">let</span> <span class="ident">lang</span> <span class="op">=</span> <span class="ident">lang</span>.<span class="ident">cloned</span>();
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">name</span>) <span class="op">=</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">get</span>(<span class="kw-2">&amp;</span><span class="ident">lang</span>) {
            <span class="kw">return</span> <span class="ident">name</span>;
        }
        <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="number">0</span>[<span class="kw-2">&amp;</span><span class="prelude-val">None</span>]
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">tags</span>: <span class="kw-2">&amp;</span><span class="ident">Tags</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">NamePerLanguage</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">native_name</span> <span class="op">=</span> <span class="ident">tags</span>.<span class="ident">get</span>(<span class="ident">osm</span>::<span class="ident">NAME</span>)<span class="question-mark">?</span>;
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
        <span class="ident">map</span>.<span class="ident">insert</span>(<span class="prelude-val">None</span>, <span class="ident">native_name</span>.<span class="ident">to_string</span>());
        <span class="kw">for</span> (<span class="ident">k</span>, <span class="ident">v</span>) <span class="kw">in</span> <span class="ident">tags</span>.<span class="ident">inner</span>() {
            <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">lang</span>) <span class="op">=</span> <span class="ident">k</span>.<span class="ident">strip_prefix</span>(<span class="string">&quot;name:&quot;</span>) {
                <span class="ident">map</span>.<span class="ident">insert</span>(<span class="prelude-val">Some</span>(<span class="ident">lang</span>.<span class="ident">to_string</span>()), <span class="ident">v</span>.<span class="ident">to_string</span>());
            }
        }
        <span class="prelude-val">Some</span>(<span class="ident">NamePerLanguage</span>(<span class="ident">map</span>))
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">unnamed</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">NamePerLanguage</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span> <span class="op">=</span> <span class="ident">BTreeMap</span>::<span class="ident">new</span>();
        <span class="ident">map</span>.<span class="ident">insert</span>(<span class="prelude-val">None</span>, <span class="string">&quot;unnamed&quot;</span>.<span class="ident">to_string</span>());
        <span class="ident">NamePerLanguage</span>(<span class="ident">map</span>)
    }
}

<span class="kw">impl</span> <span class="ident">Building</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">sidewalk</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">LaneID</span> {
        <span class="self">self</span>.<span class="ident">sidewalk_pos</span>.<span class="ident">lane</span>()
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">house_number</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">num</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">address</span>.<span class="ident">split</span>(<span class="string">&quot; &quot;</span>).<span class="ident">next</span>().<span class="ident">unwrap</span>();
        <span class="kw">if</span> <span class="ident">num</span> <span class="op">!</span><span class="op">=</span> <span class="string">&quot;???&quot;</span> {
            <span class="prelude-val">Some</span>(<span class="ident">num</span>.<span class="ident">to_string</span>())
        } <span class="kw">else</span> {
            <span class="prelude-val">None</span>
        }
    }

    <span class="doccomment">/// The polyline goes from the building to the driving position</span>
    <span class="comment">// TODO Make this handle parking_blackhole</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">driving_connection</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">Position</span>, <span class="ident">PolyLine</span>)<span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">lane</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_parent</span>(<span class="self">self</span>.<span class="ident">sidewalk</span>()).<span class="ident">find_closest_lane</span>(
            <span class="self">self</span>.<span class="ident">sidewalk</span>(),
            <span class="op">|</span><span class="ident">l</span><span class="op">|</span> <span class="ident">PathConstraints</span>::<span class="ident">Car</span>.<span class="ident">can_use</span>(<span class="ident">l</span>, <span class="ident">map</span>),
            <span class="ident">map</span>,
        )<span class="question-mark">?</span>;
        <span class="comment">// TODO Do we need to insist on this buffer, now that we can make cars gradually appear?</span>
        <span class="kw">let</span> <span class="ident">pos</span> <span class="op">=</span> <span class="self">self</span>
            .<span class="ident">sidewalk_pos</span>
            .<span class="ident">equiv_pos</span>(<span class="ident">lane</span>, <span class="ident">map</span>)
            .<span class="ident">buffer_dist</span>(<span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">7.0</span>), <span class="ident">map</span>)<span class="question-mark">?</span>;
        <span class="prelude-val">Some</span>((<span class="ident">pos</span>, <span class="self">self</span>.<span class="ident">driveway_geom</span>.<span class="ident">clone</span>().<span class="ident">must_push</span>(<span class="ident">pos</span>.<span class="ident">pt</span>(<span class="ident">map</span>))))
    }

    <span class="doccomment">/// Returns (biking position, sidewalk position). Could fail if the biking graph is</span>
    <span class="doccomment">/// disconnected.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">biking_connection</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">Position</span>, <span class="ident">Position</span>)<span class="op">&gt;</span> {
        <span class="comment">// Easy case: the building is directly next to a usable lane</span>
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">pair</span>) <span class="op">=</span> <span class="ident">sidewalk_to_bike</span>(<span class="self">self</span>.<span class="ident">sidewalk_pos</span>, <span class="ident">map</span>) {
            <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">pair</span>);
        }

        <span class="comment">// Floodfill the sidewalk graph until we find a sidewalk&lt;-&gt;bike connection.</span>
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">queue</span>: <span class="ident">VecDeque</span><span class="op">&lt;</span><span class="ident">LaneID</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">VecDeque</span>::<span class="ident">new</span>();
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">visited</span>: <span class="ident">HashSet</span><span class="op">&lt;</span><span class="ident">LaneID</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">HashSet</span>::<span class="ident">new</span>();
        <span class="ident">queue</span>.<span class="ident">push_back</span>(<span class="self">self</span>.<span class="ident">sidewalk</span>());

        <span class="kw">loop</span> {
            <span class="kw">if</span> <span class="ident">queue</span>.<span class="ident">is_empty</span>() {
                <span class="kw">return</span> <span class="prelude-val">None</span>;
            }
            <span class="kw">let</span> <span class="ident">l</span> <span class="op">=</span> <span class="ident">queue</span>.<span class="ident">pop_front</span>().<span class="ident">unwrap</span>();
            <span class="kw">if</span> <span class="ident">visited</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">l</span>) {
                <span class="kw">continue</span>;
            }
            <span class="ident">visited</span>.<span class="ident">insert</span>(<span class="ident">l</span>);
            <span class="comment">// TODO Could search by sidewalk endpoint</span>
            <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">pair</span>) <span class="op">=</span> <span class="ident">sidewalk_to_bike</span>(<span class="ident">Position</span>::<span class="ident">new</span>(<span class="ident">l</span>, <span class="ident">map</span>.<span class="ident">get_l</span>(<span class="ident">l</span>).<span class="ident">length</span>() <span class="op">/</span> <span class="number">2.0</span>), <span class="ident">map</span>)
            {
                <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">pair</span>);
            }
            <span class="kw">for</span> <span class="ident">t</span> <span class="kw">in</span> <span class="ident">map</span>.<span class="ident">get_turns_from_lane</span>(<span class="ident">l</span>) {
                <span class="kw">if</span> <span class="op">!</span><span class="ident">visited</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">t</span>.<span class="ident">id</span>.<span class="ident">dst</span>) {
                    <span class="ident">queue</span>.<span class="ident">push_back</span>(<span class="ident">t</span>.<span class="ident">id</span>.<span class="ident">dst</span>);
                }
            }
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">num_parking_spots</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">usize</span> {
        <span class="kw">match</span> <span class="self">self</span>.<span class="ident">parking</span> {
            <span class="ident">OffstreetParking</span>::<span class="ident">PublicGarage</span>(<span class="kw">_</span>, <span class="ident">n</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">n</span>,
            <span class="ident">OffstreetParking</span>::<span class="ident">Private</span>(<span class="ident">n</span>, <span class="kw">_</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">n</span>,
        }
    }

    <span class="doccomment">/// Does this building contain any amenity matching the category?</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">has_amenity</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">category</span>: <span class="ident">AmenityType</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
        <span class="kw">for</span> <span class="ident">amenity</span> <span class="kw">in</span> <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">amenities</span> {
            <span class="kw">if</span> <span class="ident">AmenityType</span>::<span class="ident">categorize</span>(<span class="kw-2">&amp;</span><span class="ident">amenity</span>.<span class="ident">amenity_type</span>) <span class="op">=</span><span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">category</span>) {
                <span class="kw">return</span> <span class="bool-val">true</span>;
            }
        }
        <span class="bool-val">false</span>
    }
}

<span class="kw">fn</span> <span class="ident">sidewalk_to_bike</span>(<span class="ident">sidewalk_pos</span>: <span class="ident">Position</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">Position</span>, <span class="ident">Position</span>)<span class="op">&gt;</span> {
    <span class="kw">let</span> <span class="ident">lane</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_parent</span>(<span class="ident">sidewalk_pos</span>.<span class="ident">lane</span>()).<span class="ident">find_closest_lane</span>(
        <span class="ident">sidewalk_pos</span>.<span class="ident">lane</span>(),
        <span class="op">|</span><span class="ident">l</span><span class="op">|</span> <span class="op">!</span><span class="ident">l</span>.<span class="ident">biking_blackhole</span> <span class="op">&amp;&amp;</span> <span class="ident">PathConstraints</span>::<span class="ident">Bike</span>.<span class="ident">can_use</span>(<span class="ident">l</span>, <span class="ident">map</span>),
        <span class="ident">map</span>,
    )<span class="question-mark">?</span>;
    <span class="comment">// No buffer needed</span>
    <span class="prelude-val">Some</span>((<span class="ident">sidewalk_pos</span>.<span class="ident">equiv_pos</span>(<span class="ident">lane</span>, <span class="ident">map</span>), <span class="ident">sidewalk_pos</span>))
}

<span class="doccomment">/// Businesses are categorized into one of these types.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">AmenityType</span> {
    <span class="ident">Groceries</span>,
    <span class="ident">Food</span>,
    <span class="ident">Bar</span>,
    <span class="ident">Medical</span>,
    <span class="ident">Religious</span>,
    <span class="ident">Education</span>,
    <span class="ident">Financial</span>,
    <span class="ident">PostOffice</span>,
    <span class="ident">Culture</span>,
    <span class="ident">Childcare</span>,
    <span class="ident">Shopping</span>,
}

<span class="kw">impl</span> <span class="ident">AmenityType</span> {
    <span class="kw">fn</span> <span class="ident">types</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span><span class="op">&gt;</span> {
        <span class="comment">// TODO: create categories for:</span>
        <span class="comment">// hairdresser beauty chemist</span>
        <span class="comment">// car_repair</span>
        <span class="comment">// laundry</span>

        <span class="kw">match</span> <span class="self">self</span> {
            <span class="ident">AmenityType</span>::<span class="ident">Groceries</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">&quot;convenience&quot;</span>, <span class="string">&quot;supermarket&quot;</span>],
            <span class="comment">// TODO Sort</span>
            <span class="ident">AmenityType</span>::<span class="ident">Food</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[
                <span class="string">&quot;restaurant&quot;</span>,
                <span class="string">&quot;cafe&quot;</span>,
                <span class="string">&quot;fast_food&quot;</span>,
                <span class="string">&quot;food_court&quot;</span>,
                <span class="string">&quot;ice_cream&quot;</span>,
                <span class="string">&quot;pastry&quot;</span>,
                <span class="string">&quot;deli&quot;</span>,
                <span class="string">&quot;greengrocer&quot;</span>,
                <span class="string">&quot;bakery&quot;</span>,
                <span class="string">&quot;butcher&quot;</span>,
                <span class="string">&quot;confectionery&quot;</span>,
                <span class="string">&quot;beverages&quot;</span>,
                <span class="string">&quot;alcohol&quot;</span>,
            ],
            <span class="ident">AmenityType</span>::<span class="ident">Bar</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">&quot;bar&quot;</span>, <span class="string">&quot;lounge&quot;</span>, <span class="string">&quot;pub&quot;</span>, <span class="string">&quot;nightclub&quot;</span>],
            <span class="ident">AmenityType</span>::<span class="ident">Medical</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[
                <span class="string">&quot;chiropractor&quot;</span>,
                <span class="string">&quot;clinic&quot;</span>,
                <span class="string">&quot;dentist&quot;</span>,
                <span class="string">&quot;hospital&quot;</span>,
                <span class="string">&quot;pharmacy&quot;</span>,
                <span class="string">&quot;optician&quot;</span>,
            ],
            <span class="ident">AmenityType</span>::<span class="ident">Religious</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">&quot;place_of_worship&quot;</span>],
            <span class="ident">AmenityType</span>::<span class="ident">Education</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">&quot;college&quot;</span>, <span class="string">&quot;school&quot;</span>, <span class="string">&quot;university&quot;</span>],
            <span class="ident">AmenityType</span>::<span class="ident">Financial</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">&quot;bank&quot;</span>],
            <span class="ident">AmenityType</span>::<span class="ident">PostOffice</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">&quot;post_office&quot;</span>],
            <span class="ident">AmenityType</span>::<span class="ident">Culture</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[
                <span class="string">&quot;arts_centre&quot;</span>,
                <span class="string">&quot;art_gallery&quot;</span>,
                <span class="string">&quot;cinema&quot;</span>,
                <span class="string">&quot;library&quot;</span>,
                <span class="string">&quot;museum&quot;</span>,
                <span class="string">&quot;theatre&quot;</span>,
            ],
            <span class="ident">AmenityType</span>::<span class="ident">Childcare</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">&quot;childcare&quot;</span>, <span class="string">&quot;kindergarten&quot;</span>],
            <span class="ident">AmenityType</span>::<span class="ident">Shopping</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec</span><span class="macro">!</span>[
                <span class="string">&quot;second_hand&quot;</span>,
                <span class="string">&quot;clothes&quot;</span>,
                <span class="string">&quot;furniture&quot;</span>,
                <span class="string">&quot;shoes&quot;</span>,
                <span class="string">&quot;department_store&quot;</span>,
                <span class="string">&quot;car&quot;</span>,
                <span class="string">&quot;kiosk&quot;</span>,
                <span class="string">&quot;hardware&quot;</span>,
                <span class="string">&quot;mobile_phone&quot;</span>,
                <span class="string">&quot;florist&quot;</span>,
                <span class="string">&quot;electronics&quot;</span>,
                <span class="string">&quot;car_parts&quot;</span>,
                <span class="string">&quot;doityourself&quot;</span>,
                <span class="string">&quot;jewelry&quot;</span>,
                <span class="string">&quot;variety_store&quot;</span>,
                <span class="string">&quot;gift&quot;</span>,
                <span class="string">&quot;bicycle&quot;</span>,
                <span class="string">&quot;books&quot;</span>,
                <span class="string">&quot;sports&quot;</span>,
                <span class="string">&quot;travel_agency&quot;</span>,
                <span class="string">&quot;stationery&quot;</span>,
                <span class="string">&quot;pet&quot;</span>,
                <span class="string">&quot;computer&quot;</span>,
                <span class="string">&quot;tyres&quot;</span>,
                <span class="string">&quot;newsagent&quot;</span>,
            ],
        }
    }

    <span class="doccomment">/// All types of amenities, in an arbitrary order.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">all</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">AmenityType</span><span class="op">&gt;</span> {
        <span class="macro">vec</span><span class="macro">!</span>[
            <span class="ident">AmenityType</span>::<span class="ident">Groceries</span>,
            <span class="ident">AmenityType</span>::<span class="ident">Food</span>,
            <span class="ident">AmenityType</span>::<span class="ident">Bar</span>,
            <span class="ident">AmenityType</span>::<span class="ident">Medical</span>,
            <span class="ident">AmenityType</span>::<span class="ident">Religious</span>,
            <span class="ident">AmenityType</span>::<span class="ident">Education</span>,
            <span class="ident">AmenityType</span>::<span class="ident">Financial</span>,
            <span class="ident">AmenityType</span>::<span class="ident">PostOffice</span>,
            <span class="ident">AmenityType</span>::<span class="ident">Culture</span>,
            <span class="ident">AmenityType</span>::<span class="ident">Childcare</span>,
            <span class="ident">AmenityType</span>::<span class="ident">Shopping</span>,
        ]
    }

    <span class="doccomment">/// Categorize an OSM amenity tag.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">categorize</span>(<span class="ident">a</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">AmenityType</span><span class="op">&gt;</span> {
        <span class="kw">for</span> <span class="ident">at</span> <span class="kw">in</span> <span class="ident">AmenityType</span>::<span class="ident">all</span>() {
            <span class="kw">if</span> <span class="ident">at</span>.<span class="ident">types</span>().<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">a</span>) {
                <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">at</span>);
            }
        }
        <span class="prelude-val">None</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">x</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">AmenityType</span><span class="op">&gt;</span> {
        <span class="kw">match</span> <span class="ident">x</span> {
            <span class="string">&quot;groceries&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Groceries</span>),
            <span class="string">&quot;food&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Food</span>),
            <span class="string">&quot;bar&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Bar</span>),
            <span class="string">&quot;medical&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Medical</span>),
            <span class="string">&quot;religious&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Religious</span>),
            <span class="string">&quot;education&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Education</span>),
            <span class="string">&quot;financial&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Financial</span>),
            <span class="string">&quot;post office&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">PostOffice</span>),
            <span class="string">&quot;culture&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Culture</span>),
            <span class="string">&quot;childcare&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Childcare</span>),
            <span class="string">&quot;shopping&quot;</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AmenityType</span>::<span class="ident">Shopping</span>),
            <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">None</span>,
        }
    }
}

<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">AmenityType</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
        <span class="macro">write</span><span class="macro">!</span>(
            <span class="ident">f</span>,
            <span class="string">&quot;{}&quot;</span>,
            <span class="kw">match</span> <span class="self">self</span> {
                <span class="ident">AmenityType</span>::<span class="ident">Groceries</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;groceries&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">Food</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;food&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">Bar</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;bar&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">Medical</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;medical&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">Religious</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;religious&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">Education</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;education&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">Financial</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;financial&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">PostOffice</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;post office&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">Culture</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;culture&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">Childcare</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;childcare&quot;</span>,
                <span class="ident">AmenityType</span>::<span class="ident">Shopping</span> <span class="op">=</span><span class="op">&gt;</span> <span class="string">&quot;shopping&quot;</span>,
            }
        )
    }
}
</pre></div>
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