Sample/Lattice/ISelectionRule: add explicit implementation of operator ==

Sample/Lattice/ISelectionRule.cpp

@@ -38,3 +38,8 @@ bool SimpleSelectionRule::isEqualTo(const ISelectionRule& isr) const
         return *this == *sr;
     return false;
 }
+
+bool SimpleSelectionRule::operator==(const SimpleSelectionRule& other) const
+{
+    return (m_a == other.m_a && m_b == other.m_b && m_c == other.m_c && m_mod == other.m_mod);
+}

Sample/Lattice/ISelectionRule.h

@@ -29,7 +29,7 @@ public:
 
     virtual bool isEqualTo(const ISelectionRule& isr) const = 0;
 
-    bool operator==(const ISelectionRule&) const = default;
+    bool operator==(const ISelectionRule&) const { return false; }
 };
 
 //! Selection rule (v*q)%modulus!=0, defined by vector v(a,b,c) and modulus.
@@ -45,7 +45,7 @@ public:
 
     bool isEqualTo(const ISelectionRule& isr) const override;
 
-    bool operator==(const SimpleSelectionRule&) const = default;
+    bool operator==(const SimpleSelectionRule& other) const;
 
 private:
     int m_a, m_b, m_c;