add a filter parsing alias of '!=' for '<>' - closes #427

CHANGELOG

@@ -15,12 +15,16 @@ For a complete change history, see the SVN log.
 Mapnik 0.6.2 Release
 --------------------
 
+- Filters: Add support for '!=' as an alias to '<>' for not-equals filters (avoids &lt;&gt;) (r1326) (#427)  
+
 - Gdal Plugin: Add support for Gdal overviews, enabling fast loading of > 1GB rasters (r1321) (#54)
 
 - PostGIS Plugin: Add bbox substitution ability in sql query string (r1292) (#415)
 
 - PostGIS Plugin: Throw and report errors if SQL execution fails (r1291) (#363)
 
+- Python: Added 'mapnik.has_pycairo()' function to test for pycairo support (r1278) (#284)
+
 - PostGIS Plugin: Added missing support for BigInt(int8) postgres datatypes (r1250) (#384)
 
 
@@ -68,6 +72,8 @@ Mapnik 0.6.1 Release
 
 - Python: Pickling support for raster_symbolizer (r1154) (#345)
 
+- Python: Added 'mapnik.has_cairo()' function to test for cairo support (r1152) (#284)
+
 - Python: Exposed dash_array get method (r1151) (#317)
 
 - Python: Pickling support for Coord objects (#345)

include/mapnik/filter_parser.hpp

@@ -473,6 +473,8 @@ namespace mapnik
                   equation = relation >> *( ( L'=' >> relation)
                                             [compose_filter<FeatureT,mapnik::equals<value> >(self.filters,self.exprs)]
                                             | ( L"<>" >> relation)
+                                            [compose_filter<FeatureT,not_equals<value> >(self.filters,self.exprs)]
+                                            | ( L"!=" >> relation)
                                             [compose_filter<FeatureT,not_equals<value> >(self.filters,self.exprs)]);
 
                   cond_expr = equation | (expression)[compose_boolean_filter<FeatureT>(self.filters,self.exprs)];

tests/data/good_maps/unique_filter_map.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Map srs="+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +units=m +no_defs" bgcolor="rgba(0,0,0,0)">
+    <Style name="poly20090929162130952_style">
+
+        <Rule>
+            <Filter>([EAS_ID]!=158)</Filter>
+            <PolygonSymbolizer>
+                <CssParameter name="fill">blue</CssParameter>
+            </PolygonSymbolizer>
+            <LineSymbolizer>
+                <CssParameter name="stroke">blue</CssParameter>
+                <CssParameter name="stroke-width">4</CssParameter>
+            </LineSymbolizer>
+        </Rule>
+
+        <Rule>
+            <Filter>([EAS_ID]&lt;&gt;158)</Filter>
+            <PolygonSymbolizer>
+                <CssParameter name="fill">green</CssParameter>
+            </PolygonSymbolizer>
+            <LineSymbolizer>
+                <CssParameter name="stroke">green</CssParameter>
+                <CssParameter name="stroke-width">2</CssParameter>
+            </LineSymbolizer>
+        </Rule>
+        
+        <Rule>
+            <ElseFilter />
+            <PolygonSymbolizer>
+                <CssParameter name="fill">red</CssParameter>
+            </PolygonSymbolizer>
+        </Rule>
+
+    </Style>
+    <Layer name="poly20090929162130952" srs="+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +units=m +no_defs" status="1" clear_label_cache="1" queryable="1">
+        <StyleName>poly20090929162130952_style</StyleName>
+        <Datasource>
+            <Parameter name="file">../../data/shp/poly.shp</Parameter>
+            <Parameter name="type">shape</Parameter>
+        </Datasource>
+    </Layer>
+</Map>