Loading of function list from QgsExpression now working

Author: NathanW2

src/core/qgsexpression.cpp

@@ -386,7 +386,7 @@ bool QgsExpression::isFunctionName( QString name )
 
 int QgsExpression::functionIndex( QString name )
 {
-  int count = sizeof( BuiltinFunctions ) / sizeof( FunctionDef);
+  int count = functionCount();
   for ( int i = 0; i < count; i++ )
   {
     if ( QString::compare( name, BuiltinFunctions[i].mName, Qt::CaseInsensitive ) == 0 )
@@ -395,6 +395,11 @@ int QgsExpression::functionIndex( QString name )
   return -1;
 }
 
+int QgsExpression::functionCount()
+{
+    return ( sizeof( BuiltinFunctions ) / sizeof( FunctionDef) );
+}
+
 
 QgsExpression::QgsExpression( const QString& expr )
     : mExpression( expr ), mRowNumber( 0 ), mCalc( NULL )

src/core/qgsexpression.h

@@ -194,6 +194,11 @@ class CORE_EXPORT QgsExpression
     // return index of the function in BuiltinFunctions array
     static int functionIndex( QString name );
 
+    /**  Returns the number of functions defined in the parser
+      *  @return The number of function defined in the parser.
+      */
+    static int functionCount();
+
     //! return quoted column reference (in double quotes)
     static QString quotedColumnRef( QString name ) { return QString( "\"%1\"" ).arg( name.replace( "\"", "\"\"" ) ); }
 

src/gui/qgsexpressionbuilder.cpp

@@ -41,13 +41,14 @@ QgsExpressionBuilderWidget::QgsExpressionBuilderWidget(QgsVectorLayer *layer)
                                                 "<br> Joins two values together into a string " \
                                                 "<br> <i>Usage:</i><br>'Dia' || Diameter");
 
-    int count = sizeof( QgsExpression::BuiltinFunctions ) / sizeof( QgsExpression::FunctionDef);
+    // Load the fuctions from the QgsExpression class
+    int count = QgsExpression::functionCount();
     for ( int i = 0; i < count; i++ )
     {
         QgsExpression::FunctionDef func = QgsExpression::BuiltinFunctions[i];
         QString name = func.mName;
         if ( func.mParams >= 1 )
-            name + "(";
+            name += "(";
         this->registerItem(func.mGroup,func.mName, " " + name + " ", func.mHelpText);
     };
 }