diff options
author | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2020-10-12 14:27:29 +0200 |
---|---|---|
committer | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2020-10-13 09:35:20 +0000 |
commit | c30a6232df03e1efbd9f3b226777b07e087a1122 (patch) | |
tree | e992f45784689f373bcc38d1b79a239ebe17ee23 /chromium/v8/src/base/template-utils.h | |
parent | 7b5b123ac58f58ffde0f4f6e488bcd09aa4decd3 (diff) | |
download | qtwebengine-chromium-85-based.tar.gz |
BASELINE: Update Chromium to 85.0.4183.14085-based
Change-Id: Iaa42f4680837c57725b1344f108c0196741f6057
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
Diffstat (limited to 'chromium/v8/src/base/template-utils.h')
-rw-r--r-- | chromium/v8/src/base/template-utils.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/chromium/v8/src/base/template-utils.h b/chromium/v8/src/base/template-utils.h index 8f89672e1af..617ef6ce34b 100644 --- a/chromium/v8/src/base/template-utils.h +++ b/chromium/v8/src/base/template-utils.h @@ -7,6 +7,7 @@ #include <array> #include <functional> +#include <iosfwd> #include <type_traits> #include <utility> @@ -22,6 +23,12 @@ constexpr inline auto make_array_helper(Function f, return {{f(Indexes)...}}; } +template <template <size_t> class Value, std::size_t... Indexes> +constexpr inline auto make_array_helper(std::index_sequence<Indexes...>) + -> std::array<typename Value<0>::value_type, sizeof...(Indexes)> { + return {{Value<Indexes>()...}}; +} + } // namespace detail // base::make_array: Create an array of fixed length, initialized by a function. @@ -35,6 +42,13 @@ constexpr auto make_array(Function f) { return detail::make_array_helper(f, std::make_index_sequence<Size>{}); } +// The same as above, but taking a template instead of a function to generate +// the values for the array. +template <std::size_t Size, template <size_t> class Value> +constexpr auto make_array() { + return detail::make_array_helper<Value>(std::make_index_sequence<Size>{}); +} + // Helper to determine how to pass values: Pass scalars and arrays by value, // others by const reference (even if it was a non-const ref before; this is // disallowed by the style guide anyway). |