private static bool KeepSurroundingParentheses(Expression expression)
{
switch (expression.NodeType)
{
case ExpressionType.Conditional:
case ExpressionType.Lambda:
return(true);
case ExpressionType.Call:
var parentExpression = expression.GetParentOrNull();
while (parentExpression != null)
{
expression = parentExpression;
parentExpression = expression.GetParentOrNull();
}
switch (expression.NodeType)
{
case ExpressionType.Add:
case ExpressionType.Convert:
case ExpressionType.Multiply:
case ExpressionType.Subtract:
return(true);
}
return(false);
case ExpressionType.Invoke:
var invocation = (InvocationExpression)expression;
return(invocation.Expression.NodeType == ExpressionType.Lambda);
}
return(false);
}
