/// <summary>
/// Provide structural equality comparison
/// </summary>
/// <param name="obj">the other value</param>
/// <returns>true if equal, false otherwise</returns>
public override bool Equals(object obj)
{
ExpressionIdentifier other = obj as ExpressionIdentifier;
if ((object)other != null)
{
return(Name.Equals(other.Name, StringComparison.Ordinal));
}
return(false);
}
/// <summary>
/// Find all of the identifiers referenced in the expression.
/// </summary>
/// <returns>the set of referenced identifiers.</returns>
public ReadOnlyCollection <ExpressionIdentifier> Identifiers()
{
HashSet <ExpressionIdentifier> identifiers = new HashSet <ExpressionIdentifier>();
Traverse(
delegate(Expression expression)
{
ExpressionIdentifier identifier = expression as ExpressionIdentifier;
if ((object)identifier != null)
{
if (!identifiers.Contains(identifier))
{
identifiers.Add(identifier);
}
}
});
return((new List <ExpressionIdentifier>(identifiers)).AsReadOnly());
}