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Private constructor does not allow to create derived classes.

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Egor Pugin
2015-09-26 13:59:26 +03:00
parent bf8f1b8f49
commit 240bc0ea0c
1 changed files with 2 additions and 2 deletions
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CppCoreGuidelines.md
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@@ -3833,7 +3833,7 @@ How would a maintainer know whether `j` was deliberately uninitialized (probably
**Example*:
class B {
private:
protected:
B() { /* ... */ } // create an imperfectly initialized object
virtual void PostInitialize() // to be called right after construction
@@ -3859,7 +3859,7 @@ How would a maintainer know whether `j` was deliberately uninitialized (probably
shared_ptr<D> p = D::Create<D>(); // creating a D object
By making the constructor `private` we avoid an incompletely constructed object escaping into the wild.
By making the constructor `protected` we avoid an incompletely constructed object escaping into the wild.
By providing the factory function `Create()`, we make construction (on the free store) convenient.
**Note**: Conventional factory functions allocate on the free store, rather than on the stack or in an enclosing object.