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author | James Ward <james.ward@arm.com> | 2020-09-25 11:43:21 +0100 |
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committer | James Ward <james.ward@arm.com> | 2020-09-30 08:41:31 +0000 |
commit | 22a4e1539aca7d39d7abc932f0a4d0b27beedf80 (patch) | |
tree | 95152943571413af5a3b550ac391bb17f258feef /third-party/mapbox/variant_visitor.hpp | |
parent | ba3ef18cb6117c49fcdbf177dce5991d6d679cbc (diff) | |
download | armnn-22a4e1539aca7d39d7abc932f0a4d0b27beedf80.tar.gz |
IVGCVSW-4519 Remove Boost Variant and apply_visitor variant
* add mapbox/variant third party package
Signed-off-by: James Ward <james.ward@arm.com>
Change-Id: I181302780edd9dace40f158a11327316a12ce69a
Diffstat (limited to 'third-party/mapbox/variant_visitor.hpp')
-rw-r--r-- | third-party/mapbox/variant_visitor.hpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/third-party/mapbox/variant_visitor.hpp b/third-party/mapbox/variant_visitor.hpp new file mode 100644 index 0000000000..54ddba0e1c --- /dev/null +++ b/third-party/mapbox/variant_visitor.hpp @@ -0,0 +1,43 @@ +#ifndef MAPBOX_UTIL_VARIANT_VISITOR_HPP +#define MAPBOX_UTIL_VARIANT_VISITOR_HPP + +#include <utility> + +namespace mapbox { +namespace util { + +template <typename... Fns> +struct visitor; + +template <typename Fn> +struct visitor<Fn> : Fn +{ + using Fn::operator(); + + template<typename T> + visitor(T&& fn) : Fn(std::forward<T>(fn)) {} +}; + +template <typename Fn, typename... Fns> +struct visitor<Fn, Fns...> : Fn, visitor<Fns...> +{ + using Fn::operator(); + using visitor<Fns...>::operator(); + + template<typename T, typename... Ts> + visitor(T&& fn, Ts&&... fns) + : Fn(std::forward<T>(fn)) + , visitor<Fns...>(std::forward<Ts>(fns)...) {} +}; + +template <typename... Fns> +visitor<typename std::decay<Fns>::type...> make_visitor(Fns&&... fns) +{ + return visitor<typename std::decay<Fns>::type...> + (std::forward<Fns>(fns)...); +} + +} // namespace util +} // namespace mapbox + +#endif // MAPBOX_UTIL_VARIANT_VISITOR_HPP |