Use = default for virtual constructors.

src/tactic/bv/bv_bound_chk_tactic.cpp

@@ -147,7 +147,7 @@ public:
     imp(ast_manager & m, params_ref const & p, bv_bound_chk_stats& stats)
         : m_rw(m, p, stats) {    }
 
-    virtual ~imp() {    }
+    virtual ~imp() = default;
 
     ast_manager& m() { return m_rw.m(); }
 

src/tactic/converter.h

@@ -26,7 +26,7 @@ class converter {
     unsigned m_ref_count;
 public:
     converter():m_ref_count(0) {}
-    virtual ~converter() {}
+    virtual ~converter() = default;
 
     void inc_ref() { ++m_ref_count;  }
 

src/tactic/core/ctx_simplify_tactic.h

@@ -26,7 +26,7 @@ public:
     class simplifier {
         goal_num_occurs* m_occs;
     public:
-        virtual ~simplifier() {}
+        virtual ~simplifier() = default;
         virtual bool assert_expr(expr * t, bool sign) = 0;
         virtual bool simplify(expr* t, expr_ref& result) = 0;
         virtual bool may_simplify(expr* t) { return true; }

src/tactic/core/dom_simplify_tactic.h

@@ -64,7 +64,7 @@ public:
 
 class dom_simplifier {
  public:
-    virtual ~dom_simplifier() {}
+    virtual ~dom_simplifier() = default;
     /**
        \brief assert_expr performs an implicit push
     */

src/tactic/probe.h

@@ -44,7 +44,7 @@ private:
 
 public:
     probe():m_ref_count(0) {}
-    virtual ~probe() {}
+    virtual ~probe() = default;
 
     void inc_ref() { ++m_ref_count; }
     void dec_ref() { SASSERT(m_ref_count > 0); --m_ref_count; if (m_ref_count == 0) dealloc(this); }

src/tactic/user_propagator_base.h

@@ -53,7 +53,7 @@ namespace user_propagator {
     class core {
     public:
 
-        virtual ~core() {}
+        virtual ~core() = default;
         
         virtual void user_propagate_init(
             void* ctx,