1 // Copyright 2024 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_RANGES_FROM_RANGE_H_ 6 #define BASE_RANGES_FROM_RANGE_H_ 7 8 namespace base { 9 10 // A marker type for constructors from a range. This is a backport of 11 // `std::from_range_t` in C++23, and will be relaced with the std version one 12 // day. 13 // 14 // https://en.cppreference.com/w/cpp/ranges/from_range 15 struct from_range_t { 16 explicit from_range_t() = default; 17 }; 18 19 // The instantiation of `from_range_t`, to be passed to constructors taking the 20 // marker type `from_range_t`. 21 constexpr inline from_range_t from_range; 22 23 } // namespace base 24 25 #endif // BASE_RANGES_FROM_RANGE_H_ 26