[Olena-patches] 731: Add a first C++0x concept-based version of mini-oln.

https://svn.lrde.epita.fr/svn/oln/trunk/static This version of mini-oln needs g++ from ConceptGCC. You can find it there: /lrde/dev/linux-x86/unstable/conceptgcc-4.1.1-alpha-5/bin/conceptg++ Index: ChangeLog from Roland Levillain &lt;roland(a)lrde.epita.fr&gt; Add a first C++0x concept-based version of mini-oln. * samples/mini-oln/concept-c++/mini-oln.cc: New. mini-oln.cc | 95 +++++++++++++++++++++++++++++++++++++++++++++++------------- 1 file changed, 75 insertions(+), 20 deletions(-) Index: samples/mini-oln/concept-c++/mini-oln.cc --- samples/mini-oln/concept-c++/mini-oln.cc (revision 0) +++ samples/mini-oln/concept-c++/mini-oln.cc (working copy) @@ -26,14 +26,16 @@ // Public License. /* \file samples/mini-oln/mini-oln.cc - \brief A proof of concept of Static using a mini-version of Olena. + \brief A proof of concept of Static using a mini-version of Olena, using + concepts from C++0x. Compile with: - g++ -I../../../{metalic,static,extended,olena} mini-oln.cc + conceptg++ -I../../../../{metalic,static,extended,olena} mini-oln.cc */ #include <vector> +#include <iostream> #include <mlc/case.hh> #include <stc/any.hh> @@ -53,6 +55,44 @@ +/*-----------. +| Concepts. | +`-----------*/ + +namespace concepts +{ + concept Point2d<typename P> {}; + concept Point3d<typename P> {}; + + auto concept Image<typename I> + { + typename point_t; + typename iter_t; + typename value_t; + + // ConceptGCC doesn't support operator signatures yet. +#if 0 + value_t& I::operator ()(point_t&); +#endif + bool I::has(const point_t&) const; + }; + + auto concept Image2d<typename I> : Image<I> + { + int I::nrows_get() const; + int I::ncols_get() const; + }; + + auto concept Image3d<typename I> : Image<I> + { + int I::nrows_get() const; + int I::ncols_get() const; + int I::nslis_get() const; + }; +} + + + /*-------------. | Mini-Olena. | `-------------*/ @@ -82,6 +122,12 @@ }; } +namespace concepts +{ + concept_map Point2d<oln::point2d> {}; + concept_map Point3d<oln::point3d> {}; +} + // ---------- // // Iterator. // @@ -293,31 +339,40 @@ namespace oln { - struct switch_image_base; + // Fwd. decl. + template <typename E> + class image_dimension_switch; - namespace error + // Default version, abort. + template <typename E> + class image_dimension_switch : mlc::abort_<E> { - struct ERROR_image_base; }; - template <typename I> - struct case_<switch_image_base, I, 1> : - public mlc::where_ < mlc::eq_ <I, point2d> > + // Concept-based overloading for Image2d. + template <typename E> where concepts::Point2d< oln_type_of(E, point) > + class image_dimension_switch<E> : public oln::Image2d { - typedef Image2d ret; - }; - - template <typename I> - struct case_<switch_image_base, I, 2> : - public mlc::where_ < mlc::eq_ <I, point3d> > + public: + image_dimension_switch() { - typedef Image3d ret; + std::cout << "image_dimension_switch<E> " + << "where concepts::Point2d<oln_type_of(E, point)>" + << std::endl; + } }; - template <typename I> - struct default_case_<switch_image_base, I> + // Concept-based overloading for Image3d. + template <typename E> where concepts::Point3d< oln_type_of(E, point) > + class image_dimension_switch<E> : public oln::Image3d + { + public: + image_dimension_switch() { - typedef mlc::undefined ret; + std::cout << "image_dimension_switch<E> " + << "where concepts::Point3d<oln_type_of(E, point)>" + << std::endl; + } }; } @@ -334,7 +389,7 @@ template<typename E> struct set_super_type< image_base<E> > { - typedef typename oln::switch_<switch_image_base, E>::ret ret; + typedef typename oln::image_dimension_switch<E> ret; }; template <typename E> @@ -346,7 +401,7 @@ }; template <typename E> - struct image_base : public oln::switch_<switch_image_base, E>::ret + struct image_base : public oln::image_dimension_switch<E> { typedef oln_type_of(image_base, point) point_t; typedef oln_type_of(image_base, iter) iter_t;