public override void Evaluate()

in src/csharp/MonoDebugSession.cs [731:777]
45 lines of code
11 McCabe index (conditional complexity)

		public override void Evaluate(Response response, dynamic args)
		{
			string error = null;

			var expression = getString(args, "expression");
			if (expression == null) {
				error = "expression missing";
			} else {
				int frameId = getInt(args, "frameId", -1);
				var frame = _frameHandles.Get(frameId, null);
				if (frame != null) {
					if (frame.ValidateExpression(expression)) {
						var val = frame.GetExpressionValue(expression, _debuggerSessionOptions.EvaluationOptions);
						val.WaitHandle.WaitOne();

						var flags = val.Flags;
						if (flags.HasFlag(ObjectValueFlags.Error) || flags.HasFlag(ObjectValueFlags.NotSupported)) {
							error = val.DisplayValue;
							if (error.IndexOf("reference not available in the current evaluation context") > 0) {
								error = "not available";
							}
						}
						else if (flags.HasFlag(ObjectValueFlags.Unknown)) {
							error = "invalid expression";
						}
						else if (flags.HasFlag(ObjectValueFlags.Object) && flags.HasFlag(ObjectValueFlags.Namespace)) {
							error = "not available";
						}
						else {
							int handle = 0;
							if (val.HasChildren) {
								handle = _variableHandles.Create(val.GetAllChildren());
							}
							SendResponse(response, new EvaluateResponseBody(val.DisplayValue, handle));
							return;
						}
					}
					else {
						error = "invalid expression";
					}
				}
				else {
					error = "no active stackframe";
				}
			}
			SendErrorResponse(response, 3014, "Evaluate request failed ({_reason}).", new { _reason = error } );
		}