Differential D14233 Diff 48875 source/blender/blenlib/BLI_index_range.hh

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source/blender/blenlib/BLI_index_range.hh

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	return this->slice(range.start(), range.size());	return this->slice(range.start(), range.size());
	}	}

		/**
		* Returns a new Span with n elements removed from the beginning. This invokes undefined
		JacquesLuckeUnsubmitted Not Done Inline Actions `Span` -> `IndexRange`. JacquesLucke: `Span` -> `IndexRange`.
		* behavior when n is negative.
		*/
		constexpr IndexRange drop_front(int64_t n) const
		{
		BLI_assert(n >= 0);
		const int64_t new_size = std::max<int64_t>(0, size_ - n);
		return IndexRange(start_ + n, new_size);
		}

		/**
		* Returns a new IndexRange with n elements removed from the beginning. This invokes undefined
		* behavior when n is negative.
		*/
		constexpr IndexRange drop_back(int64_t n) const
		{
		BLI_assert(n >= 0);
		const int64_t new_size = std::max<int64_t>(0, size_ - n);
		return IndexRange(start_, new_size);
		}

		/**
		* Returns a new IndexRange that only contains the first n elements. This invokes undefined
		* behavior when n is negative.
		*/
		constexpr IndexRange take_front(int64_t n) const
		{
		BLI_assert(n >= 0);
		const int64_t new_size = std::min<int64_t>(size_, n);
		return IndexRange(start_, new_size);
		}

		/**
		* Returns a new IndexRange that only contains the last n elements. This invokes undefined
		* behavior when n is negative.
		*/
		constexpr IndexRange take_back(int64_t n) const
		{
		HooglyBooglyAuthorUnsubmitted Done Inline Actions I'll add some tests for these if you think they're reasonable. And I can split them to a separate commit if you'd prefer too. HooglyBoogly: I'll add some tests for these if you think they're reasonable. And I can split them to a…
		JacquesLuckeUnsubmitted Not Done Inline Actions Adding some tests would be good. A separate commit too, doesn't need separate review though. JacquesLucke: Adding some tests would be good. A separate commit too, doesn't need separate review though.
		BLI_assert(n >= 0);
		const int64_t new_size = std::min<int64_t>(size_, n);
		return IndexRange(start_ + size_ - new_size, new_size);
		}

	/**	/**
	* Get read-only access to a memory buffer that contains the range as actual numbers.	* Get read-only access to a memory buffer that contains the range as actual numbers.
	*/	*/
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