A first batch of potential bugs spotted by llvm/clang

There are more warnings left, but these are the easiest to fix. And some of them are real bugs (assignments with == instead of =).

src/TextClass.h

@@ -385,7 +385,7 @@ public:
 	/// \return true if there is a Layout with latexname lay
 	bool hasLaTeXLayout(std::string const & lay) const;
 	/// A DocumentClass nevers count as loaded, since it is dynamic
-	virtual bool loaded() { return false; }
+	virtual bool loaded() const { return false; }
 	/// \return the layout object of an inset given by name. If the name
 	/// is not found as such, the part after the ':' is stripped off, and
 	/// searched again. In this way, an error fallback can be provided:

src/frontends/qt4/GuiDocument.h

@@ -183,8 +183,6 @@ private:
 	GuiIdListModel modules_av_model_;
 	/// selected modules
 	GuiIdListModel modules_sel_model_;
-	/// current buffer
-	BufferId current_id_;
 
 	/// return false if validate_listings_params returns error
 	bool isValid();

src/frontends/qt4/GuiFontLoader.cpp

@@ -131,10 +131,12 @@ QString symbolFamily(FontFamily family)
 }
 
 
+#if 0
 bool isSymbolFamily(FontFamily family)
 {
 	return family >= SYMBOL_FAMILY && family <= ESINT_FAMILY;
 }
+#endif
 
 
 static bool isChosenFont(QFont & font, QString const & family)

src/frontends/qt4/GuiWorkArea.cpp

@@ -968,7 +968,7 @@ void GuiWorkArea::generateSyntheticMouseEvent()
 		d->buffer_view_->scroll(up ? -step : step);
 		d->buffer_view_->updateMetrics();
 	} else {
-		d->buffer_view_->scrollDocView(value + up ? -step : step, false);
+		d->buffer_view_->scrollDocView(value + (up ? -step : step), false);
 	}
 
 	// In which paragraph do we have to set the cursor ?

src/frontends/qt4/GuiWorkArea.h

@@ -257,8 +257,6 @@ protected:
 private:
 	///
 	QPoint dragStartPos_;
-	///
-	int dragCurrentIndex_;
 
 Q_SIGNALS:
 	///

src/frontends/qt4/TocWidget.cpp

@@ -262,6 +262,7 @@ void TocWidget::on_persistentCB_stateChanged(int state)
 }
 
 
+#if 0
 /* FIXME (Ugras 17/11/06):
 I have implemented a indexDepth function to get the model indices. In my
 opinion, somebody should derive a new qvariant class for tocModelItem
@@ -274,7 +275,7 @@ static int indexDepth(QModelIndex const & index, int depth = -1)
 	return index.parent() == QModelIndex()
 		? depth : indexDepth(index.parent(), depth);
 }
-
+#endif
 
 void TocWidget::on_depthSL_valueChanged(int depth)
 {

src/insets/InsetCommandParams.h

@@ -31,6 +31,8 @@ class Lexer;
 
 class ParamInfo {
 public:
+	///
+	ParamInfo() {}
 	/// Types of parameters
 	enum ParamType {
 		LATEX_OPTIONAL,    /// normal optional argument

src/insets/InsetTabular.h

@@ -57,7 +57,7 @@ public:
 	///
 	InsetCode lyxCode() const { return CELL_CODE; }
 	///
-	Inset * clone() { return new InsetTableCell(*this); }
+	Inset * clone() const { return new InsetTableCell(*this); }
 	///
 	bool getStatus(Cursor & cur, FuncRequest const & cmd,
 		FuncStatus & status) const;

src/mathed/InsetMathFont.cpp

@@ -139,7 +139,7 @@ void InsetMathFont::htmlize(HtmlStream & os) const
 	         || tag == "textbf")
 		variant = "bold";
 	else if (tag == "mathcal")
-		variant == "script";
+		variant = "script";
 	else if (tag == "mathit" || tag == "textsl"
 	         || tag == "emph" || tag == "textit")
 		variant = "italic";
@@ -179,7 +179,7 @@ void InsetMathFont::mathmlize(MathStream & os) const
 	         || tag == "textbf")
 		variant = "bold";
 	else if (tag == "mathcal")
-		variant == "script";
+		variant = "script";
 	else if (tag == "mathit" || tag == "textsl"
 	         || tag == "emph" || tag == "textit")
 		variant = "italic";

src/support/FileName.h

@@ -55,8 +55,8 @@ public:
 	 * \param filename the file in question. Must have an absolute path.
 	 * Encoding is always UTF-8.
 	 */
-	virtual void set(std::string const & filename);
-	virtual void set(FileName const & fn, std::string const & suffix);
+	void set(std::string const & filename);
+	void set(FileName const & fn, std::string const & suffix);
 	virtual void erase();
 	/// Is this filename empty?
 	bool empty() const;
@@ -253,7 +253,7 @@ public:
 	 *  \param buffer_path if \c filename has a relative path, generate
 	 *  the absolute path using this.
 	 */
-	virtual void set(std::string const & filename, std::string const & buffer_path);
+	void set(std::string const & filename, std::string const & buffer_path);
 	///
 	void erase();
 	///

src/support/Messages.cpp

@@ -69,7 +69,7 @@ namespace lyx {
 
 // This version use the traditional gettext.
 Messages::Messages(string const & l)
-	: lang_(l), warned_(false)
+	: lang_(l)
 {
 	// strip off any encoding suffix, i.e., assume 8-bit po files
 	size_t i = lang_.find(".");

src/support/Messages.h

@@ -36,8 +36,6 @@ public:
 private:
 	///
 	std::string lang_;
-	/// Did we warn about unavailable locale already?
-	mutable bool warned_;
 	///
 	typedef std::map<std::string, docstring> TranslationCache;
 	/// Internal cache for gettext translated strings.