Mirrors/CppCoreGuidelines
1
0
Fork 0
mirror of https://github.com/isocpp/CppCoreGuidelines.git synced 2025-12-17 12:44:42 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

added example to C.136

Browse Source
This commit is contained in:
Bjarne Stroustrup
2017-04-02 14:36:21 -04:00
parent 13d6eff946
commit 45e11be0ad
1 changed files with 7 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
CppCoreGuidelines.md
View File

@@ -6447,7 +6447,6 @@ To make this interface useful, we must provide its implementation classes (here,
Now `Shape` is a poor example of a class with an implementation, Now `Shape` is a poor example of a class with an implementation,
but bear with us because this is just a simple example of a technique aimed at more complex hierarchies. but bear with us because this is just a simple example of a technique aimed at more complex hierarchies.
class Impl::Circle : public Circle, public Impl::Shape { // implementation class Impl::Circle : public Circle, public Impl::Shape { // implementation
public: public:
// constructors, destructor // constructors, destructor
@@ -6697,6 +6696,13 @@ If the operations are virtual the use of inheritance is necessary, if not using
This a relatively rare use because implementation can often be organized into a single-rooted hierarchy. This a relatively rare use because implementation can often be organized into a single-rooted hierarchy.
##### Example
Sometimes, an "implementation attribute" is more like a "mixin" that determine the behavior of an implementation and inject
members to enable the implementation of the policies it requires.
For example, see `std::enable_shared_from_this`
or various bases from boost.intrusive (e.g. `list_base_hook` or `intrusive_ref_counter`).
##### Enforcement ##### Enforcement
??? ???