/// <summary>
/// Determines if the <paramref name="predicate"/> yields a match in the target <paramref name="expression"/>.
/// </summary>
/// <typeparam name="TExpression">The type of <see cref="Expression"/>
/// to search for.</typeparam>
/// <param name="expression">The <see cref="Expression"/> that represents the sub tree for which to start searching.</param>
/// <param name="predicate">The <see cref="Func{T,TResult}"/> used to filter the result</param>
/// <returns>A list of <see cref="Expression"/> instances that matches the given predicate.</returns>
public static bool Contains <TExpression>(this Expression expression, Func <TExpression, bool> predicate) where TExpression : Expression
{
var finder = new ExpressionFinder <TExpression>();
return(finder.Find(expression, predicate).Any());
}
/// <summary>
/// Returns a list of <typeparamref name="TExpression"/> instances
/// that matches the <paramref name="predicate"/>.
/// </summary>
/// <typeparam name="TExpression">The type of <see cref="Expression"/>
/// to search for.</typeparam>
/// <param name="expression">The <see cref="Expression"/> that represents the sub tree for which to start searching.</param>
/// <param name="predicate">The <see cref="Func{T,TResult}"/> used to filter the result</param>
/// <returns>A list of <see cref="Expression"/> instances that matches the given predicate.</returns>
public static IEnumerable <TExpression> Find <TExpression>(this Expression expression, Func <TExpression, bool> predicate) where TExpression : Expression
{
var finder = new ExpressionFinder <TExpression>();
return(finder.Find(expression, predicate));
}