Codeeditor class improvements (#4057)

gui/codeeditor.cpp

@@ -71,20 +71,24 @@ Highlighter::Highlighter(QTextDocument *parent,
                     << "export"
                     << "extern"
                     << "false"
+                    << "final"
                     << "float"
                     << "for"
                     << "friend"
                     << "goto"
                     << "if"
+                    << "import"
                     << "inline"
                     << "int"
                     << "long"
+                    << "module"
                     << "mutable"
                     << "namespace"
                     << "new"
                     << "noexcept"
                     << "nullptr"
                     << "operator"
+                    << "override"
                     << "private"
                     << "protected"
                     << "public"
@@ -130,7 +134,9 @@ Highlighter::Highlighter(QTextDocument *parent,
 
     mQuotationFormat.setForeground(mWidgetStyle->quoteColor);
     mQuotationFormat.setFontWeight(mWidgetStyle->quoteWeight);
-    rule.pattern = QRegularExpression("\".*\"");
+    // We use lazy `*?` instead greed `*` quantifier to find the real end of the c-string.
+    // We use negative lookbehind assertion `(?<!\)` to ignore `\"` sequience in the c-string.
+    rule.pattern = QRegularExpression("\".*?(?<!\\\\)\"");
     rule.format = mQuotationFormat;
     rule.ruleRole = RuleRole::Quote;
     mHighlightingRules.append(rule);