IT. Expert System.

override is an identifier with a special meaning when used after member function declarators: it's not a reserved keyword otherwise.

Syntax:

declarator  

In a member function declaration, override may appear in virt-specifier-seq immediately after the declarator, and before the pure-specifier, if used.

Example:

struct A
{
   virtual void foo();
   void bar();
};
 
struct B : A
{
   void foo() const override; // Error: B::foo does not override A::foo
                              // (signature mismatch)
   void foo() override; // OK: B::foo overrides A::foo
   void bar() override; // Error: A::bar is not virtual
};

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