{"id":10263,"url":"https://patchwork.libcamera.org/api/patches/10263/?format=json","web_url":"https://patchwork.libcamera.org/patch/10263/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20201026195209.16748-1-laurent.pinchart@ideasonboard.com>","date":"2020-10-26T19:52:08","name":"[libcamera-devel,1/2] libcamera: Use helper variable template for type traits","commit_ref":"6cbdc2859963e17bc897a4022f1d68170477d888","pull_url":null,"state":"accepted","archived":false,"hash":"ba59bc4ade60803734966cd3b7f9d8d44cfddc92","submitter":{"id":2,"url":"https://patchwork.libcamera.org/api/people/2/?format=json","name":"Laurent Pinchart","email":"laurent.pinchart@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/10263/mbox/","series":[{"id":1418,"url":"https://patchwork.libcamera.org/api/series/1418/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1418","date":"2020-10-26T19:52:08","name":"[libcamera-devel,1/2] libcamera: Use helper variable template for type traits","version":1,"mbox":"https://patchwork.libcamera.org/series/1418/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/10263/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/10263/checks/","tags":{},"headers":{"Return-Path":"<libcamera-devel-bounces@lists.libcamera.org>","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 991DCC3B5C\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 26 Oct 2020 19:53:02 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id E6A8462067;\n\tMon, 26 Oct 2020 20:53:01 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 5F40B60350\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 26 Oct 2020 20:53:00 +0100 (CET)","from pendragon.lan (62-78-145-57.bb.dnainternet.fi [62.78.145.57])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id D9AB5527\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 26 Oct 2020 20:52:59 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"moauUd8K\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1603741980;\n\tbh=Iz5L6q5eGV5XMDwUcIW2q1bVKWYgqyoE9ARr/nweGBs=;\n\th=From:To:Subject:Date:From;\n\tb=moauUd8KuR/fM85H7Qe11oAbsRAplXq/MA4/WadC7dDz7gOeiaoRGguew7XjRaemb\n\tAbNzmCNtUL6AhsfTWt7Daqu45hbyFFBTyjXDqAXK+Lc6UjfxEIoBMqNRDlpXB2fGFW\n\t+4K1Ybdm710iHCaYZJPR+/nAe/qlstSoF42FkVfQ=","From":"Laurent Pinchart <laurent.pinchart@ideasonboard.com>","To":"libcamera-devel@lists.libcamera.org","Date":"Mon, 26 Oct 2020 21:52:08 +0200","Message-Id":"<20201026195209.16748-1-laurent.pinchart@ideasonboard.com>","X-Mailer":"git-send-email 2.27.0","MIME-Version":"1.0","Subject":"[libcamera-devel] [PATCH 1/2] libcamera: Use helper variable\n\ttemplate for type traits","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"<libcamera-devel.lists.libcamera.org>","List-Unsubscribe":"<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>","List-Archive":"<https://lists.libcamera.org/pipermail/libcamera-devel/>","List-Post":"<mailto:libcamera-devel@lists.libcamera.org>","List-Help":"<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>","List-Subscribe":"<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>"},"content":"C++17 introduces helper variable templates for type traits, allowing\nshortening std::is_foo<T>::value to std::is_foo_v<T>. Use them through\nthe code base.\n\nSigned-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>\n---\n include/libcamera/bound_method.h |  2 +-\n include/libcamera/controls.h     | 12 ++++----\n include/libcamera/object.h       |  2 +-\n include/libcamera/signal.h       |  4 +--\n include/libcamera/span.h         | 48 ++++++++++++++++----------------\n 5 files changed, 34 insertions(+), 34 deletions(-)","diff":"diff --git a/include/libcamera/bound_method.h b/include/libcamera/bound_method.h\nindex 95a956530877..feac51dac527 100644\n--- a/include/libcamera/bound_method.h\n+++ b/include/libcamera/bound_method.h\n@@ -63,7 +63,7 @@ public:\n \t}\n \tvirtual ~BoundMethodBase() = default;\n \n-\ttemplate<typename T, typename std::enable_if_t<!std::is_same<Object, T>::value> * = nullptr>\n+\ttemplate<typename T, typename std::enable_if_t<!std::is_same_v<Object, T>> * = nullptr>\n \tbool match(T *obj) { return obj == obj_; }\n \tbool match(Object *object) { return object == object_; }\n \ndiff --git a/include/libcamera/controls.h b/include/libcamera/controls.h\nindex 3b7f3347761e..dc549a92f975 100644\n--- a/include/libcamera/controls.h\n+++ b/include/libcamera/controls.h\n@@ -98,7 +98,7 @@ public:\n #ifndef __DOXYGEN__\n \ttemplate<typename T, typename std::enable_if_t<!details::is_span<T>::value &&\n \t\t\t\t\t\t       details::control_type<T>::value &&\n-\t\t\t\t\t\t       !std::is_same<std::string, std::remove_cv_t<T>>::value,\n+\t\t\t\t\t\t       !std::is_same_v<std::string, std::remove_cv_t<T>>,\n \t\t\t\t\t\t       std::nullptr_t> = nullptr>\n \tControlValue(const T &value)\n \t\t: type_(ControlTypeNone), numElements_(0)\n@@ -108,7 +108,7 @@ public:\n \t}\n \n \ttemplate<typename T, typename std::enable_if_t<details::is_span<T>::value ||\n-\t\t\t\t\t\t       std::is_same<std::string, std::remove_cv_t<T>>::value,\n+\t\t\t\t\t\t       std::is_same_v<std::string, std::remove_cv_t<T>>,\n \t\t\t\t\t\t       std::nullptr_t> = nullptr>\n #else\n \ttemplate<typename T>\n@@ -142,7 +142,7 @@ public:\n \n #ifndef __DOXYGEN__\n \ttemplate<typename T, typename std::enable_if_t<!details::is_span<T>::value &&\n-\t\t\t\t\t\t       !std::is_same<std::string, std::remove_cv_t<T>>::value,\n+\t\t\t\t\t\t       !std::is_same_v<std::string, std::remove_cv_t<T>>,\n \t\t\t\t\t\t       std::nullptr_t> = nullptr>\n \tT get() const\n \t{\n@@ -153,7 +153,7 @@ public:\n \t}\n \n \ttemplate<typename T, typename std::enable_if_t<details::is_span<T>::value ||\n-\t\t\t\t\t\t       std::is_same<std::string, std::remove_cv_t<T>>::value,\n+\t\t\t\t\t\t       std::is_same_v<std::string, std::remove_cv_t<T>>,\n \t\t\t\t\t\t       std::nullptr_t> = nullptr>\n #else\n \ttemplate<typename T>\n@@ -170,7 +170,7 @@ public:\n \n #ifndef __DOXYGEN__\n \ttemplate<typename T, typename std::enable_if_t<!details::is_span<T>::value &&\n-\t\t\t\t\t\t       !std::is_same<std::string, std::remove_cv_t<T>>::value,\n+\t\t\t\t\t\t       !std::is_same_v<std::string, std::remove_cv_t<T>>,\n \t\t\t\t\t\t       std::nullptr_t> = nullptr>\n \tvoid set(const T &value)\n \t{\n@@ -179,7 +179,7 @@ public:\n \t}\n \n \ttemplate<typename T, typename std::enable_if_t<details::is_span<T>::value ||\n-\t\t\t\t\t\t       std::is_same<std::string, std::remove_cv_t<T>>::value,\n+\t\t\t\t\t\t       std::is_same_v<std::string, std::remove_cv_t<T>>,\n \t\t\t\t\t\t       std::nullptr_t> = nullptr>\n #else\n \ttemplate<typename T>\ndiff --git a/include/libcamera/object.h b/include/libcamera/object.h\nindex a1882f05fb77..423208db24bd 100644\n--- a/include/libcamera/object.h\n+++ b/include/libcamera/object.h\n@@ -32,7 +32,7 @@ public:\n \tvoid postMessage(std::unique_ptr<Message> msg);\n \n \ttemplate<typename T, typename R, typename... FuncArgs, typename... Args,\n-\t\t typename std::enable_if_t<std::is_base_of<Object, T>::value> * = nullptr>\n+\t\t typename std::enable_if_t<std::is_base_of_v<Object, T>> * = nullptr>\n \tR invokeMethod(R (T::*func)(FuncArgs...), ConnectionType type,\n \t\t       Args... args)\n \t{\ndiff --git a/include/libcamera/signal.h b/include/libcamera/signal.h\nindex 5bcd7a77c5f1..46d917d5f582 100644\n--- a/include/libcamera/signal.h\n+++ b/include/libcamera/signal.h\n@@ -44,7 +44,7 @@ public:\n \t}\n \n #ifndef __DOXYGEN__\n-\ttemplate<typename T, typename R, typename std::enable_if_t<std::is_base_of<Object, T>::value> * = nullptr>\n+\ttemplate<typename T, typename R, typename std::enable_if_t<std::is_base_of_v<Object, T>> * = nullptr>\n \tvoid connect(T *obj, R (T::*func)(Args...),\n \t\t     ConnectionType type = ConnectionTypeAuto)\n \t{\n@@ -52,7 +52,7 @@ public:\n \t\tSignalBase::connect(new BoundMethodMember<T, void, Args...>(obj, object, func, type));\n \t}\n \n-\ttemplate<typename T, typename R, typename std::enable_if_t<!std::is_base_of<Object, T>::value> * = nullptr>\n+\ttemplate<typename T, typename R, typename std::enable_if_t<!std::is_base_of_v<Object, T>> * = nullptr>\n #else\n \ttemplate<typename T, typename R>\n #endif\ndiff --git a/include/libcamera/span.h b/include/libcamera/span.h\nindex 91e9f974cc58..d720adb81f89 100644\n--- a/include/libcamera/span.h\n+++ b/include/libcamera/span.h\n@@ -125,8 +125,8 @@ public:\n \n \ttemplate<std::size_t N>\n \tconstexpr Span(element_type (&arr)[N],\n-\t\t       std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n-\t\t\t\t\t\t\t    element_type (*)[]>::value &&\n+\t\t       std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n+\t\t\t\t\t\t\t      element_type (*)[]> &&\n \t\t\t\t\tN == Extent,\n \t\t\t\t\tstd::nullptr_t> = nullptr) noexcept\n \t\t: data_(arr)\n@@ -135,8 +135,8 @@ public:\n \n \ttemplate<std::size_t N>\n \tconstexpr Span(std::array<value_type, N> &arr,\n-\t\t       std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n-\t\t\t\t\t\t\t    element_type (*)[]>::value &&\n+\t\t       std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n+\t\t\t\t\t\t\t      element_type (*)[]> &&\n \t\t\t\t\tN == Extent,\n \t\t\t\t\tstd::nullptr_t> = nullptr) noexcept\n \t\t: data_(arr.data())\n@@ -145,8 +145,8 @@ public:\n \n \ttemplate<std::size_t N>\n \tconstexpr Span(const std::array<value_type, N> &arr,\n-\t\t       std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n-\t\t\t\t\t\t\t    element_type (*)[]>::value &&\n+\t\t       std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n+\t\t\t\t\t\t\t      element_type (*)[]> &&\n \t\t\t\t\tN == Extent,\n \t\t\t\t\tstd::nullptr_t> = nullptr) noexcept\n \t\t: data_(arr.data())\n@@ -157,9 +157,9 @@ public:\n \texplicit constexpr Span(Container &cont,\n \t\t\t\tstd::enable_if_t<!details::is_span<Container>::value &&\n \t\t\t\t\t\t !details::is_array<Container>::value &&\n-\t\t\t\t\t\t !std::is_array<Container>::value &&\n-\t\t\t\t\t\t std::is_convertible<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],\n-\t\t\t\t\t\t\t\t     element_type (*)[]>::value,\n+\t\t\t\t\t\t !std::is_array_v<Container> &&\n+\t\t\t\t\t\t std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],\n+\t\t\t\t\t\t\t\t       element_type (*)[]>,\n \t\t\t\t\t\t std::nullptr_t> = nullptr)\n \t\t: data_(utils::data(cont))\n \t{\n@@ -169,9 +169,9 @@ public:\n \texplicit constexpr Span(const Container &cont,\n \t\t\t\tstd::enable_if_t<!details::is_span<Container>::value &&\n \t\t\t\t\t\t !details::is_array<Container>::value &&\n-\t\t\t\t\t\t !std::is_array<Container>::value &&\n-\t\t\t\t\t\t std::is_convertible<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],\n-\t\t\t\t\t\t\t\t     element_type (*)[]>::value,\n+\t\t\t\t\t\t !std::is_array_v<Container> &&\n+\t\t\t\t\t\t std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],\n+\t\t\t\t\t\t\t\t       element_type (*)[]>,\n \t\t\t\t\t\t std::nullptr_t> = nullptr)\n \t\t: data_(utils::data(cont))\n \t{\n@@ -180,7 +180,7 @@ public:\n \n \ttemplate<class U, std::size_t N>\n \texplicit constexpr Span(const Span<U, N> &s,\n-\t\t\t\tstd::enable_if_t<std::is_convertible<U (*)[], element_type (*)[]>::value &&\n+\t\t\t\tstd::enable_if_t<std::is_convertible_v<U (*)[], element_type (*)[]> &&\n \t\t\t\t\t\t N == Extent,\n \t\t\t\t\t\t std::nullptr_t> = nullptr) noexcept\n \t\t: data_(s.data())\n@@ -293,8 +293,8 @@ public:\n \n \ttemplate<std::size_t N>\n \tconstexpr Span(element_type (&arr)[N],\n-\t\t       std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n-\t\t\t\t\t\t\t    element_type (*)[]>::value,\n+\t\t       std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n+\t\t\t\t\t\t\t      element_type (*)[]>,\n \t\t\t\t\tstd::nullptr_t> = nullptr) noexcept\n \t\t: data_(arr), size_(N)\n \t{\n@@ -302,8 +302,8 @@ public:\n \n \ttemplate<std::size_t N>\n \tconstexpr Span(std::array<value_type, N> &arr,\n-\t\t       std::enable_if_t<std::is_convertible<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n-\t\t\t\t\t\t\t    element_type (*)[]>::value,\n+\t\t       std::enable_if_t<std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(arr))> (*)[],\n+\t\t\t\t\t\t\t      element_type (*)[]>,\n \t\t\t\t\tstd::nullptr_t> = nullptr) noexcept\n \t\t: data_(utils::data(arr)), size_(N)\n \t{\n@@ -319,9 +319,9 @@ public:\n \tconstexpr Span(Container &cont,\n \t\t       std::enable_if_t<!details::is_span<Container>::value &&\n \t\t\t\t\t!details::is_array<Container>::value &&\n-\t\t\t\t\t!std::is_array<Container>::value &&\n-\t\t\t\t\tstd::is_convertible<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],\n-\t\t\t\t\t\t\t    element_type (*)[]>::value,\n+\t\t\t\t\t!std::is_array_v<Container> &&\n+\t\t\t\t\tstd::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],\n+\t\t\t\t\t\t\t      element_type (*)[]>,\n \t\t\t\t\tstd::nullptr_t> = nullptr)\n \t\t: data_(utils::data(cont)), size_(utils::size(cont))\n \t{\n@@ -331,9 +331,9 @@ public:\n \tconstexpr Span(const Container &cont,\n \t\t       std::enable_if_t<!details::is_span<Container>::value &&\n \t\t\t\t\t!details::is_array<Container>::value &&\n-\t\t\t\t\t!std::is_array<Container>::value &&\n-\t\t\t\t\tstd::is_convertible<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],\n-\t\t\t\t\t\t\t    element_type (*)[]>::value,\n+\t\t\t\t\t!std::is_array_v<Container> &&\n+\t\t\t\t\tstd::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],\n+\t\t\t\t\t\t\t      element_type (*)[]>,\n \t\t\t\t\tstd::nullptr_t> = nullptr)\n \t\t: data_(utils::data(cont)), size_(utils::size(cont))\n \t{\n@@ -341,7 +341,7 @@ public:\n \n \ttemplate<class U, std::size_t N>\n \tconstexpr Span(const Span<U, N> &s,\n-\t\t       std::enable_if_t<std::is_convertible<U (*)[], element_type (*)[]>::value,\n+\t\t       std::enable_if_t<std::is_convertible_v<U (*)[], element_type (*)[]>,\n \t\t\t\t\tstd::nullptr_t> = nullptr) noexcept\n \t\t: data_(s.data()), size_(s.size())\n \t{\n","prefixes":["libcamera-devel","1/2"]}