Fixed operator precedence (#2308)

wonder · wonder · commit 9fc31d468fb2 · 2009-12-22T14:13:49.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk@12578 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/core/qgssearchstringparser.yy b/src/core/qgssearchstringparser.yy
@@ -84,18 +84,21 @@ void addToTmpNodes(QgsSearchTreeNode* node);
 //%error-verbose
 
 // operator precedence
-// all operators have left associativity
-// (right associtativity is used for assignment)
-%left '^'
-%left '*' '/'
-%left '+' '-'
-%left UMINUS  // fictious symbol (for unary minus)
-%left COMPARISON
+// all operators have left associativity, i.e. 1+2+3 traslates to (1+2)+3
+// the order of operators here determines their precendence
 
-%left AND
 %left OR
+%left AND
 %left NOT
 
+%left COMPARISON
+
+%left '+' '-'
+%left '*' '/'
+%left '^'
+%left UMINUS  // fictious symbol (for unary minus)
+
+
 %%
 
 root: search_cond { /*gParserRootNode = $1;*/ }
