Optimization. Avoid expensive exception calls.

--HG--
branch : develop

src/app/valentina/xml/vpattern.cpp

@@ -3679,17 +3679,7 @@ void VPattern::ParseIncrementsElement(const QDomNode &node)
                 if (domElement.tagName() == TagIncrement)
                 {
                     const QString name = GetParametrString(domElement, AttrName, "");
-
+                    const QString desc = GetParametrEmptyString(domElement, AttrDescription);
-                    QString desc;
-                    try
-                    {
-                        desc = GetParametrString(domElement, AttrDescription);
-                    }
-                    catch (VExceptionEmptyParameter &e)
-                    {
-                        Q_UNUSED(e)
-                    }
-
                     const QString formula = GetParametrString(domElement, AttrFormula, "0");
                     bool ok = false;
                     const qreal value = EvalFormula(data, formula, &ok);

src/libs/ifc/xml/vabstractpattern.cpp

@@ -207,13 +207,10 @@ namespace
 void ReadExpressionAttribute(QVector<VFormulaField> &expressions, const QDomElement &element, const QString &attribute)
 {
     VFormulaField formula;
-    try
+    formula.expression = VDomDocument::GetParametrEmptyString(element, attribute);
+
+    if (formula.expression.isEmpty())
     {
-        formula.expression = VDomDocument::GetParametrString(element, attribute);
-    }
-    catch (VExceptionEmptyParameter &e)
-    {
-        Q_UNUSED(e)
         return;
     }
 

src/libs/ifc/xml/vdomdocument.cpp

@@ -456,16 +456,9 @@ QString VDomDocument::GetParametrString(const QDomElement &domElement, const QSt
 //---------------------------------------------------------------------------------------------------------------------
 QString VDomDocument::GetParametrEmptyString(const QDomElement &domElement, const QString &name)
 {
-    QString result;
+    Q_ASSERT_X(not name.isEmpty(), Q_FUNC_INFO, "name of parametr is empty");
-    try
+    Q_ASSERT_X(not domElement.isNull(), Q_FUNC_INFO, "domElement is null");
-    {
+    return domElement.attribute(name);
-        result = GetParametrString(domElement, name, "");
-    }
-    catch(const VExceptionEmptyParameter &)
-    {
-        // do nothing
-    }
-    return result;
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/libs/vformat/vmeasurements.cpp

@@ -269,26 +269,8 @@ void VMeasurements::ReadMeasurements() const
         const QDomElement dom = list.at(i).toElement();
 
         const QString name = GetParametrString(dom, AttrName);
-
+        const QString description = GetParametrEmptyString(dom, AttrDescription);
-        QString description;
+        const QString fullName = GetParametrEmptyString(dom, AttrFullName);
-        try
-        {
-            description = GetParametrString(dom, AttrDescription);
-        }
-        catch (VExceptionEmptyParameter &e)
-        {
-            Q_UNUSED(e)
-        }
-
-        QString fullName;
-        try
-        {
-            fullName = GetParametrString(dom, AttrFullName);
-        }
-        catch (VExceptionEmptyParameter &e)
-        {
-            Q_UNUSED(e)
-        }
 
         QSharedPointer<VMeasurement> meash;
         QSharedPointer<VMeasurement> tempMeash;