[libcamera-devel] [PATCH v2 1/2] Revert "libcamera: span: Provide and use helper variable templates for type traits"

[Laurent Pinchart]

Hi Jean-Michel,

Thank you for the patch.

On Tue, Jan 26, 2021 at 02:04:14PM +0100, Jean-Michel Hautbois wrote:
> This reverts commit 8e42c2feb7ff7c350ffbbf97dd963dfd54e21faa.

Missing Signed-off-by. Same for the next patch. Could you provide them
in an e-mail reply ?

> ---
>  include/libcamera/controls.h | 12 ++++++------
>  include/libcamera/span.h     | 22 ++++++++--------------
>  2 files changed, 14 insertions(+), 20 deletions(-)
> 
> diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h
> index 3634dc43..dc549a92 100644
> --- a/include/libcamera/controls.h
> +++ b/include/libcamera/controls.h
> @@ -96,7 +96,7 @@ public:
>  	ControlValue();
>  
>  #ifndef __DOXYGEN__
> -	template<typename T, typename std::enable_if_t<!details::is_span_v<T> &&
> +	template<typename T, typename std::enable_if_t<!details::is_span<T>::value &&
>  						       details::control_type<T>::value &&
>  						       !std::is_same_v<std::string, std::remove_cv_t<T>>,
>  						       std::nullptr_t> = nullptr>
> @@ -107,7 +107,7 @@ public:
>  		    &value, 1, sizeof(T));
>  	}
>  
> -	template<typename T, typename std::enable_if_t<details::is_span_v<T> ||
> +	template<typename T, typename std::enable_if_t<details::is_span<T>::value ||
>  						       std::is_same_v<std::string, std::remove_cv_t<T>>,
>  						       std::nullptr_t> = nullptr>
>  #else
> @@ -141,7 +141,7 @@ public:
>  	}
>  
>  #ifndef __DOXYGEN__
> -	template<typename T, typename std::enable_if_t<!details::is_span_v<T> &&
> +	template<typename T, typename std::enable_if_t<!details::is_span<T>::value &&
>  						       !std::is_same_v<std::string, std::remove_cv_t<T>>,
>  						       std::nullptr_t> = nullptr>
>  	T get() const
> @@ -152,7 +152,7 @@ public:
>  		return *reinterpret_cast<const T *>(data().data());
>  	}
>  
> -	template<typename T, typename std::enable_if_t<details::is_span_v<T> ||
> +	template<typename T, typename std::enable_if_t<details::is_span<T>::value ||
>  						       std::is_same_v<std::string, std::remove_cv_t<T>>,
>  						       std::nullptr_t> = nullptr>
>  #else
> @@ -169,7 +169,7 @@ public:
>  	}
>  
>  #ifndef __DOXYGEN__
> -	template<typename T, typename std::enable_if_t<!details::is_span_v<T> &&
> +	template<typename T, typename std::enable_if_t<!details::is_span<T>::value &&
>  						       !std::is_same_v<std::string, std::remove_cv_t<T>>,
>  						       std::nullptr_t> = nullptr>
>  	void set(const T &value)
> @@ -178,7 +178,7 @@ public:
>  		    reinterpret_cast<const void *>(&value), 1, sizeof(T));
>  	}
>  
> -	template<typename T, typename std::enable_if_t<details::is_span_v<T> ||
> +	template<typename T, typename std::enable_if_t<details::is_span<T>::value ||
>  						       std::is_same_v<std::string, std::remove_cv_t<T>>,
>  						       std::nullptr_t> = nullptr>
>  #else
> diff --git a/include/libcamera/span.h b/include/libcamera/span.h
> index e7ffef12..d720adb8 100644
> --- a/include/libcamera/span.h
> +++ b/include/libcamera/span.h
> @@ -31,9 +31,6 @@ template<typename U, std::size_t N>
>  struct is_array<std::array<U, N>> : public std::true_type {
>  };
>  
> -template<typename T>
> -inline constexpr bool is_array_v = is_array<T>::value;
> -
>  template<typename U>
>  struct is_span : public std::false_type {
>  };
> @@ -42,9 +39,6 @@ template<typename U, std::size_t Extent>
>  struct is_span<Span<U, Extent>> : public std::true_type {
>  };
>  
> -template<typename T>
> -inline constexpr bool is_span_v = is_span<T>::value;
> -
>  } /* namespace details */
>  
>  namespace utils {
> @@ -161,8 +155,8 @@ public:
>  
>  	template<class Container>
>  	explicit constexpr Span(Container &cont,
> -				std::enable_if_t<!details::is_span_v<Container> &&
> -						 !details::is_array_v<Container> &&
> +				std::enable_if_t<!details::is_span<Container>::value &&
> +						 !details::is_array<Container>::value &&
>  						 !std::is_array_v<Container> &&
>  						 std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
>  								       element_type (*)[]>,
> @@ -173,8 +167,8 @@ public:
>  
>  	template<class Container>
>  	explicit constexpr Span(const Container &cont,
> -				std::enable_if_t<!details::is_span_v<Container> &&
> -						 !details::is_array_v<Container> &&
> +				std::enable_if_t<!details::is_span<Container>::value &&
> +						 !details::is_array<Container>::value &&
>  						 !std::is_array_v<Container> &&
>  						 std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
>  								       element_type (*)[]>,
> @@ -323,8 +317,8 @@ public:
>  
>  	template<class Container>
>  	constexpr Span(Container &cont,
> -		       std::enable_if_t<!details::is_span_v<Container> &&
> -					!details::is_array_v<Container> &&
> +		       std::enable_if_t<!details::is_span<Container>::value &&
> +					!details::is_array<Container>::value &&
>  					!std::is_array_v<Container> &&
>  					std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
>  							      element_type (*)[]>,
> @@ -335,8 +329,8 @@ public:
>  
>  	template<class Container>
>  	constexpr Span(const Container &cont,
> -		       std::enable_if_t<!details::is_span_v<Container> &&
> -					!details::is_array_v<Container> &&
> +		       std::enable_if_t<!details::is_span<Container>::value &&
> +					!details::is_array<Container>::value &&
>  					!std::is_array_v<Container> &&
>  					std::is_convertible_v<std::remove_pointer_t<decltype(utils::data(cont))> (*)[],
>  							      element_type (*)[]>,

-- 
Regards,

Laurent Pinchart