Delete copy assignment constructors

Add explicit keyword to constructors
Add Line access to Syl and Char

src/Char.cc

@@ -3,6 +3,7 @@
 Char::Char(const Char& old) :
     char_(old.char_),
     dur(old.dur),
-    style(old.style)
+    style(old.style),
+    line(old.line)
 {
 }

src/Char.hpp

@@ -3,17 +3,22 @@
 
 #include "Style.hpp"
 
+class Line;
+
 class Char {
 private:
     QChar char_;
     unsigned int dur;
 
     Style *style;
+    Line *line;
 
 public:
     // Copy constructor
-    Char(const Char&);
-    Char(const QChar);
+    explicit Char(const Char&);
+    explicit Char(const QChar);
+
+    Char& operator=(const Char&) = delete;
     ~Char() noexcept = default;
 };
 

src/Line.hpp

@@ -19,9 +19,11 @@ private:
     QVector<Syl> syls;
 
 public:
-    Line();
-    Line(const Line&);
-    Line(QString);
+    explicit Line();
+    explicit Line(const Line&);
+    explicit Line(QString);
+    Line& operator=(const Line&) = delete;
+
     ~Line() noexcept = default;
 };
 

src/Style.hpp

@@ -30,9 +30,11 @@ private:
 
 public:
     // Should grab and copy a user-changeable default style
-    Style();
-    Style(const Style&);
-    Style(const QString&);
+    explicit Style();
+    explicit Style(const Style&);
+    explicit Style(const QString&);
+
+    Style& operator=(const Style&) = delete;
     ~Style() noexcept = default;
 };
 

src/Syl.cc

@@ -3,6 +3,7 @@
 Syl::Syl(const Syl& old) :
     chars(old.chars),
     dur(old.dur),
-    style(old.style)
+    style(old.style),
+    line(old.line)
 {
 }

src/Syl.hpp

@@ -4,16 +4,21 @@
 #include "Char.hpp"
 #include "Style.hpp"
 
+class Line;
+
 class Syl {
 private:
     QVector<Char> chars;
     unsigned int dur;
 
     Style *style;
+    Line *line;
 
 public:
-    Syl(const Syl&);
-    Syl(const QString);
+    explicit Syl(const Syl&);
+    explicit Syl(const QString);
+
+    Syl& operator=(const Syl&) = delete;
     ~Syl() noexcept = default;
 };