Initial commit

core-library/views/trim-elements-view.h

@@ -0,0 +1,55 @@
+#pragma once
+#include "core-library/views/trim-view.h"
+
+namespace core {
+
+template<std::ranges::forward_range Range>
+	requires requires(Range&& range) {
+		(void)range.empty();
+		(void)trim_view{(*std::begin(range))};
+	}
+class trim_elements_view : public std::ranges::view_interface<trim_elements_view<Range>>
+{
+public:
+	constexpr trim_elements_view(Range range)
+	: m_range(std::move(range))
+	{
+	}
+
+	class iterator
+	{
+	public:
+		using base_t = std::ranges::iterator_t<Range>;
+
+		constexpr iterator(base_t base, base_t end)
+		: m_base{base}
+		, m_end{end}
+		{
+		}
+
+		constexpr bool operator!=(iterator other) const { return m_base != other.m_base; }
+		constexpr auto operator*() const { return trim_view{*m_base}; }
+
+		constexpr iterator& operator++()
+		{
+			// Skip empty elements
+			while (++m_base != m_end && std::ranges::empty(**this)) {}
+
+			return *this;
+		}
+
+	private:
+		base_t m_base;
+		base_t m_end;
+	};
+
+	constexpr auto begin() { return iterator{std::begin(m_range), std::end(m_range)}; }
+	constexpr auto end() { return iterator{std::end(m_range), std::end(m_range)}; }
+
+private:
+	Range m_range{};
+};
+
+constexpr view_closure<trim_elements_view> trim_elements{};
+
+}