The document discusses the ongoing development and status of C++ and JavaScript bindings for EFL (Enlightenment Foundation Libraries), indicating that the C++ bindings are in the stabilization phase while JavaScript bindings are in early development. It highlights a focus on performance and modern API features in C++, aiming to avoid dependence on Boost libraries, and explores potential APIs that align with JavaScript developers' expectations. Additionally, it presents ideas for building on JavaScript and Lua bindings, emphasizing portability and user interface considerations.

1. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
EFL bindings for C++ and JS
Expertise Solutions
Felipe Magno de Almeida
October 11, 2014

2. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Status
▶ C++ binding status
▶ Stabilization phase
▶ JavaScript binding status
▶ Early development
▶ EINA

3. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Status
▶ C++ binding status
▶ Stabilization phase
▶ JavaScript binding status
▶ Early development
▶ EINA

4. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Status
▶ C++ binding status
▶ Stabilization phase
▶ JavaScript binding status
▶ Early development
▶ EINA

5. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Status
▶ C++ binding status
▶ Stabilization phase
▶ JavaScript binding status
▶ Early development
▶ EINA

6. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Status
▶ C++ binding status
▶ Stabilization phase
▶ JavaScript binding status
▶ Early development
▶ EINA

7. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
C++
▶ Focus on performance
▶ Modern API
▶ Use C++11 features
▶ Doesn’t depend on Boost Libraries

8. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
C++
▶ Focus on performance
▶ Modern API
▶ Use C++11 features
▶ Doesn’t depend on Boost Libraries

9. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
C++
▶ Focus on performance
▶ Modern API
▶ Use C++11 features
▶ Doesn’t depend on Boost Libraries

10. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
C++
▶ Focus on performance
▶ Modern API
▶ Use C++11 features
▶ Doesn’t depend on Boost Libraries

11. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
C++
▶ Focus on performance
▶ Modern API
▶ Use C++11 features
▶ Doesn’t depend on Boost Libraries

12. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Performance
▶ Thin wrapper for C
▶ Eina C++
▶ Expedite C++

13. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Performance
▶ Thin wrapper for C
▶ Eina C++
▶ Expedite C++

14. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Thin wrappers
Eina_List * raw = · · · ;
e f l : : e i n a : : l i s t <int > l i s t ( raw ) ;
f o r ( auto x : l i s t )
std : : cout << x << std : : endl ;
c a l l _ c _ f u n c t i o n ( l i s t . native_handle ( ) ) ;

15. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Thin wrappers
/// @ b r i e f Eo C on s t ru ct or .
///
/// Co nst ruc ts the o b j e c t from an Eo* p o i n t e r s
///
/// @param eo The Eo o b j e c t p o i n t e r .
///
e x p l i c i t canvas ( Eo* eo )
: e f l : : eo : : base ( eo )
{}

16. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Thin wrappers
e f l : : e i n a : : r a n g e _ l i s t <evas : : object >
foo () const
{
Eina_List * _tmp_ret ;
eo_do ( _eo_ptr ( ) , _tmp_ret = : : bar_foo ( ) ) ;
r e t u r n e f l : : e o l i a n : : to_cxx
< e f l : : e i n a : : r a n g e _ l i s t < evas : : o b j e c t >>
( _tmp_ret ,
std : : tuple <std : : f al se _t yp e ,
std : : fa ls e_ ty pe >());
}

17. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Performance
▶ Thin wrapper for C
▶ Eina C++
▶ Expedite C++

18. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Performance
▶ Thin wrapper for C
▶ Eina C++
▶ Expedite C++

19. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Expedite C++
▶ Comparable performance to C
▶ Still a few cases to investigate
▶ Naive conversion to C++
▶ Test optimizations
▶ Allows us to catch performance regressions

20. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Expedite C++
▶ Comparable performance to C
▶ Still a few cases to investigate
▶ Naive conversion to C++
▶ Test optimizations
▶ Allows us to catch performance regressions

21. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Expedite C++
▶ Comparable performance to C
▶ Still a few cases to investigate
▶ Naive conversion to C++
▶ Test optimizations
▶ Allows us to catch performance regressions

22. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Expedite C++
▶ Comparable performance to C
▶ Still a few cases to investigate
▶ Naive conversion to C++
▶ Test optimizations
▶ Allows us to catch performance regressions

23. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Expedite C++
▶ Comparable performance to C
▶ Still a few cases to investigate
▶ Naive conversion to C++
▶ Test optimizations
▶ Allows us to catch performance regressions

24. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
C++
▶ Focus on performance
▶ Modern API
▶ Use C++11 features
▶ Doesn’t depend on Boost Libraries

25. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Modern API and C++11
▶ Show examples

26. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
C++
▶ Focus on performance
▶ Modern API
▶ Use C++11 features
▶ Doesn’t depend on Boost Libraries

27. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Doesn’t depend on Boost
▶ C++11
▶ std :: error_code
▶ Type Traits
▶ Tuples

28. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Doesn’t depend on Boost
▶ C++11
▶ std :: error_code
▶ Type Traits
▶ Tuples

29. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Doesn’t depend on Boost
▶ C++11
▶ std :: error_code
▶ Type Traits
▶ Tuples

30. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Doesn’t depend on Boost
▶ C++11
▶ std :: error_code
▶ Type Traits
▶ Tuples

31. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Type Traits
template <typename T>
c l a s s i n a r r a y
: p u b l i c e i n a : : i f _
<e i n a : : is_pod<T>, _pod_inarray <T>
, _nonpod_inarray<T> >:: type
{

32. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Type Traits
template <typename C o n t i g u o u s I t e r a t o r >
s t r i n g s h a r e ( C o n t i g u o u s I t e r a t o r i
, C o n t i g u o u s I t e r a t o r j
, typename e i n a : : e n a b l e _ i f
<e i n a : : i s _ c o n t i g u o u s _ i t e r a t o r
<C o n t i g u o u s I t e r a t o r >:: value >:: type * = 0)
: _ s t r i n g ( : : e i n a _ s t r i n g s h a r e _ a d d _ l e n g t h
(&* i , j − i ) )
{

33. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Type Traits
template <typename T, typename Enable = void >
s t r u c t i s _ c o n t i g u o u s _ i t e r a t o r
: i n d i r e c t _ i s _ c o n t i g u o u s _ i t e r a t o r <T>
{};
template <>
s t r u c t i s _ c o n t i g u o u s _ i t e r a t o r
<std : : s t r i n g : : c o n s t _ i t e r a t o r > : true_type
{};
template <>
s t r u c t i s _ c o n t i g u o u s _ i t e r a t o r
<std : : s t r i n g : : i t e r a t o r > : true_type
{};

34. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
JavaScript
▶ Using V8
▶ Initial development of EINA data structures
▶ We’re looking for an API that mimics what JS
developers would expect
▶ Ideas on JS bindings

35. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
JavaScript
▶ Using V8
▶ Initial development of EINA data structures
▶ We’re looking for an API that mimics what JS
developers would expect
▶ Ideas on JS bindings

36. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
JavaScript
▶ Using V8
▶ Initial development of EINA data structures
▶ We’re looking for an API that mimics what JS
developers would expect
▶ Ideas on JS bindings

37. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Ideas to build on JS and Lua bindings
▶ Portability
▶ GUI for JavaScript
▶ AppStore
▶ More ideas to create today

38. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Ideas to build on JS and Lua bindings
▶ Portability
▶ GUI for JavaScript
▶ AppStore
▶ More ideas to create today

39. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Ideas to build on JS and Lua bindings
▶ Portability
▶ GUI for JavaScript
▶ AppStore
▶ More ideas to create today

40. .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Ideas to build on JS and Lua bindings
▶ Portability
▶ GUI for JavaScript
▶ AppStore
▶ More ideas to create today