Fixed compiler warnings from gcc 4.0.2:

- Added empty constructors and virtual destructors to many classes and structs
- Removed some usage of the offsetof() macro to instead use C++ class pointers

1 files changed, 17 insertions, 0 deletions

diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h
index 15aebd2492c..89aafa5721e 100644
--- a/sql/item_cmpfunc.h
+++ b/sql/item_cmpfunc.h
@@ -128,6 +128,8 @@ public:
 class Comp_creator
 {
 public:
+  Comp_creator() {}                           /* Remove gcc warning */
+  virtual ~Comp_creator() {}                  /* Remove gcc warning */
   virtual Item_bool_func2* create(Item *a, Item *b) const = 0;
   virtual const char* symbol(bool invert) const = 0;
   virtual bool eqne_op() const = 0;
@@ -137,6 +139,8 @@ public:
 class Eq_creator :public Comp_creator
 {
 public:
+  Eq_creator() {}                             /* Remove gcc warning */
+  virtual ~Eq_creator() {}                    /* Remove gcc warning */
   virtual Item_bool_func2* create(Item *a, Item *b) const;
   virtual const char* symbol(bool invert) const { return invert? "<>" : "="; }
   virtual bool eqne_op() const { return 1; }
@@ -146,6 +150,8 @@ public:
 class Ne_creator :public Comp_creator
 {
 public:
+  Ne_creator() {}                             /* Remove gcc warning */
+  virtual ~Ne_creator() {}                    /* Remove gcc warning */
   virtual Item_bool_func2* create(Item *a, Item *b) const;
   virtual const char* symbol(bool invert) const { return invert? "=" : "<>"; }
   virtual bool eqne_op() const { return 1; }
@@ -155,6 +161,8 @@ public:
 class Gt_creator :public Comp_creator
 {
 public:
+  Gt_creator() {}                             /* Remove gcc warning */
+  virtual ~Gt_creator() {}                    /* Remove gcc warning */
   virtual Item_bool_func2* create(Item *a, Item *b) const;
   virtual const char* symbol(bool invert) const { return invert? "<=" : ">"; }
   virtual bool eqne_op() const { return 0; }
@@ -164,6 +172,8 @@ public:
 class Lt_creator :public Comp_creator
 {
 public:
+  Lt_creator() {}                             /* Remove gcc warning */
+  virtual ~Lt_creator() {}                    /* Remove gcc warning */
   virtual Item_bool_func2* create(Item *a, Item *b) const;
   virtual const char* symbol(bool invert) const { return invert? ">=" : "<"; }
   virtual bool eqne_op() const { return 0; }
@@ -173,6 +183,8 @@ public:
 class Ge_creator :public Comp_creator
 {
 public:
+  Ge_creator() {}                             /* Remove gcc warning */
+  virtual ~Ge_creator() {}                    /* Remove gcc warning */
   virtual Item_bool_func2* create(Item *a, Item *b) const;
   virtual const char* symbol(bool invert) const { return invert? "<" : ">="; }
   virtual bool eqne_op() const { return 0; }
@@ -182,6 +194,8 @@ public:
 class Le_creator :public Comp_creator
 {
 public:
+  Le_creator() {}                             /* Remove gcc warning */
+  virtual ~Le_creator() {}                    /* Remove gcc warning */
   virtual Item_bool_func2* create(Item *a, Item *b) const;
   virtual const char* symbol(bool invert) const { return invert? ">" : "<="; }
   virtual bool eqne_op() const { return 0; }
@@ -739,6 +753,7 @@ class cmp_item_int :public cmp_item
 {
   longlong value;
 public:
+  cmp_item_int() {}                           /* Remove gcc warning */
   void store_value(Item *item)
   {
     value= item->val_int();
@@ -759,6 +774,7 @@ class cmp_item_real :public cmp_item
 {
   double value;
 public:
+  cmp_item_real() {}                          /* Remove gcc warning */
   void store_value(Item *item)
   {
     value= item->val_real();
@@ -780,6 +796,7 @@ class cmp_item_decimal :public cmp_item
 {
   my_decimal value;
 public:
+  cmp_item_decimal() {}                       /* Remove gcc warning */
   void store_value(Item *item);
   int cmp(Item *arg);
   int compare(cmp_item *c);