private static void CheckDeconstructLambda(Expression body, IList <ParameterExpression> parameters)
{
if (body.Type != typeof(void))
{
throw Error.DeconstructionShouldReturnVoid();
}
if (parameters.Count < 3)
{
throw Error.DeconstructionShouldHaveThreeOrMoreParameters();
}
for (int i = 1, n = parameters.Count; i < n; i++)
{
if (!parameters[i].IsByRef)
{
throw Error.DeconstructionParameterShouldBeByRef(i);
}
}
}
