Order of selectors with pseudoelements

[zerkms]

I've tried to convert https://github.com/mapbox/osm-bright to mapnik xml and has found that magnacarto does not keep the right order of the selectors with pseudoelements.

The roads in OSM Bright are defined something like

#roads_high::outline[zoom>=11][zoom<=20],
#tunnel[render='1_outline'][zoom>=11][zoom<=20],
#bridge[render='1_outline'][zoom>=11][zoom<=20]{
...
}
#roads_high[zoom>=11][zoom<=20],
#tunnel[render='3_inline'][zoom>=11][zoom<=20],
#bridge[render='3_inline'][zoom>=11][zoom<=20]{
...
}

The resulting magnacarto generated xml looks

  <Layer name="roads_high" srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" maxzoom="400000" minzoom="500">
    <StyleName>roads_high</StyleName>
    <StyleName>roads_high-outline</StyleName>

while it should be

  <Layer name="roads_high" srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
    <StyleName><![CDATA[roads_high-outline]]></StyleName>
    <StyleName><![CDATA[roads_high]]></StyleName>

(the latter was generated using different tool hence other minor differences)