/// <summary>
/// 指定した型に限定して，指定した要素の最初の子要素を取得します．
/// </summary>
/// <typeparam name="T"> </typeparam>
/// <param name="element"> </param>
/// <param name="dummyForInference"> </param>
/// <returns> </returns>
public static T FirstElement <T>(
this UnifiedElement element, T dummyForInference = null)
where T : class
{
Contract.Requires(element != null);
return(element.Elements <T>().FirstOrDefault());
}
/// <summary>
/// 深さ優先で指定した要素の子孫を列挙します．
/// </summary>
/// <param name="element"> </param>
/// <returns> </returns>
public static IEnumerable <UnifiedElement> Descendants(
this UnifiedElement element)
{
Contract.Requires(element != null);
var children = element.Elements()
.Where(e => e != null);
foreach (var child in children)
{
yield return(child);
foreach (var grandchild in child.Descendants())
{
yield return(grandchild);
}
}
}
/// <summary>
/// 深さ優先で指定した要素の子孫を列挙します． ただし条件に一致する要素を見つけたとき，その要素の探索を中止し次の要素の探索に移ります．
/// </summary>
/// <param name="element"> </param>
/// <param name="predicate"> </param>
/// <returns> </returns>
public static IEnumerable <UnifiedElement> DescendantsUntil(
this UnifiedElement element,
Func <UnifiedElement, bool> predicate)
{
Contract.Requires(element != null);
var children = element.Elements()
.Where(e => e != null && !predicate(e));
foreach (var child in children)
{
yield return(child);
foreach (var grandchild in child.DescendantsUntil(predicate))
{
yield return(grandchild);
}
}
}
/// <summary>
/// 親要素に不適切な要素がないかソースコードを指定して検査します。
/// </summary>
/// <param name="codeObject"> 検査対象のモデル </param>
/// <param name="message"> アサーションに違反した際のエラーメッセージ </param>
private static void AssertParentProperty(
UnifiedElement codeObject, string message)
{
foreach (var element in codeObject.Elements()) {
if (element != null) {
Assert.That(element.Parent, Is.SameAs(codeObject), message);
AssertParentProperty(element, message);
}
}
}
private static void InitializeCounter(
UnifiedElement model,
IDictionary<string, int> counter)
{
var outers = model.Elements()
.Where(
e => e is UnifiedClassLikeDefinition ||
e is UnifiedFunctionDefinition);
foreach (var e in outers) {
var outerStr = GetOutersString(e);
counter[outerStr] = 0;
}
}