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* Travis OpenCV4 update, testing Ubuntu with new OpenCV * Fix to Ubuntu travis * Another attempt at OpenCV 4.0 for Ubuntu * And another OpenCV attempt. * Simplifying the travis script * Ubuntu OpenCV 4 support. * Updating to OpenCV 4, for x64 windows. * Fixes to move to OpenCV 4 on windows. * Travis fix for OpenCV 4 on OSX * Renaming a lib. * Travis opencv4 fix. * Building OpenCV4 versions using appveyor. * Attempt mac travis fix. * Small travis fix. * Travis fix attempt. * First iteration in boost removal and upgrade to C++17 * Test with ocv 4.0 * Moving filesystem out of stdafx * Some more boost testing with cmake. * More CMAKE options * More compiler flag changes * Another attempt at compiler options. * Another attempt. * More filesystem stuff. * Linking to filesystem. * Cmake fix with target linking. * Attempting travis with g++-8 * Attempting to setup g++8 on travis linux. * Another travis change. * Adding OpenBLAS to travis and removing g++-8 * Fixing typo * More travis experiments. * More travis debugging. * A small directory change. * Adding some more travis changes. * travis typo fix. * Some reordering of travis, for cleaner yml * Removing `using namespace std` in order to avoid clash with byte and to make the code more consistent. * Working towards removing std::filesystem requirement, allow boost::filesystem as well. * Making boost an optional dependency * Fixing std issue. * Fixing cmake issue. * Fixing the precompiled header issue. * Another cmake boost fix. * Including missing files. * Removing unnecessary includes. * Removing more includes. * Changes to appveyor build, proper removal of VS2015 * If boost is present, do not need to link to filesystem. * Removing un-needed link library. * oops * Mac attempt at opencv4 travis. * Upgrading OCV to 4.1 on VS2018 * Downloading OpenCV binaries through a script * Triger an appveyor build. * Upgrading VS version. * Attempting VS2017 build * Adding win-32 libraries for OpenCV 4.1 * Adding OpenCV 32 bit libraries.
93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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//
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// Copyright (C) 2018 Intel Corporation
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#ifndef OPENCV_GAPI_UTIL_HPP
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#define OPENCV_GAPI_UTIL_HPP
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#include <utility> // std::tuple
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// \cond HIDDEN_SYMBOLS
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// This header file contains some generic utility functions which are
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// used in other G-API Public API headers.
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//
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// PLEASE don't put any stuff here if it is NOT used in public API headers!
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namespace cv
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{
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namespace detail
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{
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// Recursive integer sequence type, useful for enumerating elements of
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// template parameter packs.
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template<int... I> struct Seq { using next = Seq<I..., sizeof...(I)>; };
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template<int Sz> struct MkSeq { using type = typename MkSeq<Sz-1>::type::next; };
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template<> struct MkSeq<0>{ using type = Seq<>; };
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// Checks if elements of variadic template satisfy the given Predicate.
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// Implemented via tuple, with an interface to accept plain type lists
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template<template<class> class, typename, typename...> struct all_satisfy;
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template<template<class> class F, typename T, typename... Ts>
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struct all_satisfy<F, std::tuple<T, Ts...> >
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{
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static const constexpr bool value = F<T>::value
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&& all_satisfy<F, std::tuple<Ts...> >::value;
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};
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template<template<class> class F, typename T>
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struct all_satisfy<F, std::tuple<T> >
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{
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static const constexpr bool value = F<T>::value;
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};
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template<template<class> class F, typename T, typename... Ts>
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struct all_satisfy: public all_satisfy<F, std::tuple<T, Ts...> > {};
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// Permute given tuple type C with given integer sequence II
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// Sequence may be less than tuple C size.
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template<class, class> struct permute_tuple;
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template<class C, int... IIs>
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struct permute_tuple<C, Seq<IIs...> >
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{
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using type = std::tuple< typename std::tuple_element<IIs, C>::type... >;
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};
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// Given T..., generates a type sequence of sizeof...(T)-1 elements
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// which is T... without its last element
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// Implemented via tuple, with an interface to accept plain type lists
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template<typename T, typename... Ts> struct all_but_last;
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template<typename T, typename... Ts>
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struct all_but_last<std::tuple<T, Ts...> >
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{
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using C = std::tuple<T, Ts...>;
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using S = typename MkSeq<std::tuple_size<C>::value - 1>::type;
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using type = typename permute_tuple<C, S>::type;
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};
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template<typename T, typename... Ts>
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struct all_but_last: public all_but_last<std::tuple<T, Ts...> > {};
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template<typename... Ts>
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using all_but_last_t = typename all_but_last<Ts...>::type;
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// NB.: This is here because there's no constexpr std::max in C++11
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template<std::size_t S0, std::size_t... SS> struct max_of_t
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{
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static constexpr const std::size_t rest = max_of_t<SS...>::value;
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static constexpr const std::size_t value = rest > S0 ? rest : S0;
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};
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template<std::size_t S> struct max_of_t<S>
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{
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static constexpr const std::size_t value = S;
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};
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} // namespace detail
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} // namespace cv
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// \endcond
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#endif // OPENCV_GAPI_UTIL_HPP
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