public static bool TryParse()

in binding/SkiaSharp/SKColor.cs [130:243]
78 lines of code
26 McCabe index (conditional complexity)

		public static bool TryParse (string hexString, out SKColor color)
		{
			if (string.IsNullOrWhiteSpace (hexString)) {
				// error
				color = SKColor.Empty;
				return false;
			}

#if NETCOREAPP3_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
			// clean up string
			var hexSpan = hexString.AsSpan ().Trim ().TrimStart ('#');

			var len = hexSpan.Length;
			if (len == 3 || len == 4) {
				byte a;
				// parse [A]
				if (len == 4) {
					if (!byte.TryParse (hexSpan.Slice (0, 1), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out a)) {
						// error
						color = SKColor.Empty;
						return false;
					}
					a = (byte)(a << 4 | a);
				} else {
					a = 255;
				}

				// parse RGB
				if (!byte.TryParse (hexSpan.Slice (len - 3, 1), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var r) ||
					!byte.TryParse (hexSpan.Slice (len - 2, 1), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var g) ||
					!byte.TryParse (hexSpan.Slice (len - 1, 1), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var b)) {
					// error
					color = SKColor.Empty;
					return false;
				}

				// success
				color = new SKColor ((byte)(r << 4 | r), (byte)(g << 4 | g), (byte)(b << 4 | b), a);
				return true;
			}

			if (len == 6 || len == 8) {
				// parse [AA]RRGGBB
				if (!uint.TryParse (hexSpan, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var number)) {
					// error
					color = SKColor.Empty;
					return false;
				}

				// success
				color = (SKColor)number;

				// alpha was not provided, so use 255
				if (len == 6) {
					color = color.WithAlpha (255);
				}
				return true;
			}
#else
			// clean up string
			hexString = hexString.Trim ();
			var startIndex = hexString[0] == '#' ? 1 : 0;

			var len = hexString.Length - startIndex;
			if (len == 3 || len == 4) {
				byte a;
				// parse [A]
				if (len == 4) {
					if (!byte.TryParse (string.Concat (new string (hexString[len - 4 + startIndex], 2)), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out a)) {
						// error
						color = SKColor.Empty;
						return false;
					}
				} else {
					a = 255;
				}

				// parse RGB
				if (!byte.TryParse (new string (hexString[len - 3 + startIndex], 2), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var r) ||
					!byte.TryParse (new string (hexString[len - 2 + startIndex], 2), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var g) ||
					!byte.TryParse (new string (hexString[len - 1 + startIndex], 2), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var b)) {
					// error
					color = SKColor.Empty;
					return false;
				}

				// success
				color = new SKColor (r, g, b, a);
				return true;
			}

			if (len == 6 || len == 8) {
				// parse [AA]RRGGBB
				if (!uint.TryParse (hexString.Substring (startIndex), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var number)) {
					// error
					color = SKColor.Empty;
					return false;
				}

				// success
				color = (SKColor)number;

				// alpha was not provided, so use 255
				if (len == 6) {
					color = color.WithAlpha (255);
				}
				return true;
			}
#endif

			// error
			color = SKColor.Empty;
			return false;
		}