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| author | Dan Goodliffe <dan@randomdan.homeip.net> | 2023-04-10 14:34:56 +0100 |
|---|---|---|
| committer | Dan Goodliffe <dan@randomdan.homeip.net> | 2023-04-10 14:34:56 +0100 |
| commit | e7d946aadebfdf49cc96e6a518c1af1ef7f5c71c (patch) | |
| tree | 5077b9db0ea285f665d2225347dbddd0512ce658 | |
| parent | Add the plant/foliage game item concepts (diff) | |
| download | ilt-e7d946aadebfdf49cc96e6a518c1af1ef7f5c71c.tar.bz2 ilt-e7d946aadebfdf49cc96e6a518c1af1ef7f5c71c.tar.xz ilt-e7d946aadebfdf49cc96e6a518c1af1ef7f5c71c.zip | |
Add operator* helper specialised for std::span
| -rw-r--r-- | lib/collections.hpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/lib/collections.hpp b/lib/collections.hpp index b51d18e..8f5a43d 100644 --- a/lib/collections.hpp +++ b/lib/collections.hpp @@ -78,6 +78,27 @@ operator*(const C<T...> & in, auto && f) return out; } +template<typename T, std::size_t N> +[[nodiscard]] constexpr auto +operator*(const std::span<T, N> in, auto && f) +{ + std::array<decltype(f(std::declval<T>())), N> out; + + std::transform(in.begin(), in.end(), out.begin(), f); + return out; +} + +template<typename T> +[[nodiscard]] constexpr auto +operator*(const std::span<T, std::dynamic_extent> in, auto && f) +{ + std::vector<decltype(f(std::declval<T>()))> out; + + out.reserve(in.size()); + std::transform(in.begin(), in.end(), std::inserter(out, out.end()), f); + return out; +} + template<typename... T> constexpr auto & operator+=(std::vector<T...> & in, std::vector<T...> && src) |