FindReferences: API idea for new options

ICSharpCode.NRefactory.CSharp/Resolver/FindReferencedEntities.cs

@@ -27,13 +27,39 @@ namespace ICSharpCode.NRefactory.CSharp.Resolver
 	/// </summary>
 	public sealed class FindReferencedEntities : IResolveVisitorNavigator
 	{
-		readonly Action<AstNode, IEntity> referenceFound;
+		readonly Action<AstNode, IMember> memberReferenceFound;
+		readonly Action<AstNode, IType> typeReferenceFound;
 		
+		/// <summary>
+		/// Creates a new FindReferencedEntities instance that
+		/// looks for entity definitions.
+		/// The visitor will report type definitions and member definitions (not specialized members).
+		/// </summary>
 		public FindReferencedEntities(Action<AstNode, IEntity> referenceFound)
 		{
 			if (referenceFound == null)
 				throw new ArgumentNullException("referenceFound");
-			this.referenceFound = referenceFound;
+			this.memberReferenceFound = (node, member) => referenceFound(node, member.MemberDefinition);
+			this.typeReferenceFound = (node, type) => {
+				var def = type.GetDefinition();
+				if (def != null)
+					referenceFound(node, def);
+			};
+		}
+		
+		/// <summary>
+		/// Creates a new FindReferencedEntities instance that
+		/// looks for types and members.
+		/// The visitor will report parameterized types and potentially specialized members.
+		/// </summary>
+		public FindReferencedEntities(Action<AstNode, IType> typeReferenceFound, Action<AstNode, IMember> memberReferenceFound)
+		{
+			if (typeReferenceFound == null)
+				throw new ArgumentNullException("typeReferenceFound");
+			if (memberReferenceFound == null)
+				throw new ArgumentNullException("memberReferenceFound");
+			this.typeReferenceFound = typeReferenceFound;
+			this.memberReferenceFound = memberReferenceFound;
 		}
 		
 		public ResolveVisitorNavigationMode Scan(AstNode node)
@@ -48,28 +74,26 @@ namespace ICSharpCode.NRefactory.CSharp.Resolver
 			
 			MemberResolveResult mrr = result as MemberResolveResult;
 			if (mrr != null) {
-				referenceFound(node, mrr.Member.MemberDefinition);
+				memberReferenceFound(node, mrr.Member);
 			}
 			TypeResolveResult trr = result as TypeResolveResult;
 			if (trr != null) {
-				ITypeDefinition typeDef = trr.Type.GetDefinition();
-				if (typeDef != null)
-					referenceFound(node, typeDef);
+				typeReferenceFound(node, trr.Type);
 			}
 			ForEachResolveResult ferr = result as ForEachResolveResult;
 			if (ferr != null) {
 				Resolved(node, ferr.GetEnumeratorCall);
 				if (ferr.CurrentProperty != null)
-					referenceFound(node, ferr.CurrentProperty.MemberDefinition);
+					memberReferenceFound(node, ferr.CurrentProperty);
 				if (ferr.MoveNextMethod != null)
-					referenceFound(node, ferr.MoveNextMethod.MemberDefinition);
+					memberReferenceFound(node, ferr.MoveNextMethod);
 			}
 		}
 		
 		public void ProcessConversion(Expression expression, ResolveResult result, Conversion conversion, IType targetType)
 		{
 			if (conversion.IsUserDefined || conversion.IsMethodGroupConversion) {
-				referenceFound(expression, conversion.Method.MemberDefinition);
+				memberReferenceFound(expression, conversion.Method);
 			}
 		}
 	}

ICSharpCode.NRefactory.CSharp/Resolver/FindReferences.cs

@@ -42,9 +42,42 @@ namespace ICSharpCode.NRefactory.CSharp.Resolver
 	{
 		#region Properties
 		/// <summary>
-		/// Gets/Sets whether to find type references even if an alias is being used.
+		/// Specifies whether to find type references even if an alias is being used.
+		/// Aliases may be <c>var</c> or <c>using Alias = ...;</c>.
 		/// </summary>
 		public bool FindTypeReferencesEvenIfAliased { get; set; }
+		
+		/// <summary>
+		/// Specifies whether find references should only look for specialized matches
+		/// with equal type parameter substitution to the member we are searching for.
+		/// </summary>
+		public bool FindOnlySpecializedReferences { get; set; }
+		
+		/// <summary>
+		/// If this option is enabled, find references on a overridden member
+		/// will find calls to the base member.
+		/// </summary>
+		public bool FindCallsThroughVirtualBaseMethod { get; set; }
+		
+		/// <summary>
+		/// If this option is enabled, find references on a member implementing
+		/// an interface will also find calls to the interface.
+		/// </summary>
+		public bool FindCallsThroughInterface { get; set; }
+		
+		/// <summary>
+		/// If this option is enabled, find references will look for all references
+		/// to the virtual method slot.
+		/// </summary>
+		public bool WholeVirtualSlot { get; set; }
+		
+		/// <summary>
+		/// Specifies whether to look for references in documentation comments.
+		/// This will find entity references in <c>cref</c> attributes and
+		/// parameter references in <c>&lt;param&gt;</c> and <c>&lt;paramref&gt;</c> tags.
+		/// TODO: implement this feature.
+		/// </summary>
+		public bool SearchInDocumentationComments { get; set; }
 		#endregion
 		
 		#region GetEffectiveAccessibility

ICSharpCode.NRefactory.CSharp/Resolver/TypeInference.cs

@@ -629,15 +629,12 @@ namespace ICSharpCode.NRefactory.CSharp.Resolver
 			// Handle array types:
 			ArrayType arrU = U as ArrayType;
 			ArrayType arrV = V as ArrayType;
-			ParameterizedType pV = V as ParameterizedType;
 			if (arrU != null && arrV != null && arrU.Dimensions == arrV.Dimensions) {
 				MakeLowerBoundInference(arrU.ElementType, arrV.ElementType);
 				return;
-			} else if (arrU != null && IsIEnumerableCollectionOrList(pV) && arrU.Dimensions == 1) {
-				MakeLowerBoundInference(arrU.ElementType, pV.GetTypeArgument(0));
-				return;
 			}
 			// Handle parameterized types:
+			ParameterizedType pV = V as ParameterizedType;
 			if (pV != null) {
 				ParameterizedType uniqueBaseType = null;
 				foreach (IType baseU in U.GetAllBaseTypes()) {
@@ -677,20 +674,6 @@ namespace ICSharpCode.NRefactory.CSharp.Resolver
 				Log.Unindent();
 			}
 		}
-		
-		static bool IsIEnumerableCollectionOrList(ParameterizedType rt)
-		{
-			if (rt == null || rt.TypeParameterCount != 1)
-				return false;
-			switch (rt.GetDefinition().FullName) {
-				case "System.Collections.Generic.IList":
-				case "System.Collections.Generic.ICollection":
-				case "System.Collections.Generic.IEnumerable":
-					return true;
-				default:
-					return false;
-			}
-		}
 		#endregion
 		
 		#region MakeUpperBoundInference (§7.5.2.10)
@@ -713,15 +696,12 @@ namespace ICSharpCode.NRefactory.CSharp.Resolver
 			// Handle array types:
 			ArrayType arrU = U as ArrayType;
 			ArrayType arrV = V as ArrayType;
-			ParameterizedType pU = U as ParameterizedType;
 			if (arrV != null && arrU != null && arrU.Dimensions == arrV.Dimensions) {
 				MakeUpperBoundInference(arrU.ElementType, arrV.ElementType);
 				return;
-			} else if (arrV != null && IsIEnumerableCollectionOrList(pU) && arrV.Dimensions == 1) {
-				MakeUpperBoundInference(pU.GetTypeArgument(0), arrV.ElementType);
-				return;
 			}
 			// Handle parameterized types:
+			ParameterizedType pU = U as ParameterizedType;
 			if (pU != null) {
 				ParameterizedType uniqueBaseType = null;
 				foreach (IType baseV in V.GetAllBaseTypes()) {

ICSharpCode.NRefactory.Tests/CSharp/Resolver/TypeInferenceTests.cs

@@ -70,6 +70,25 @@ namespace ICSharpCode.NRefactory.CSharp.Resolver
 			Assert.IsTrue(success);
 		}
 		
+		[Test]
+		public void ArrayToReadOnlyList()
+		{
+			ITypeParameter tp = new DefaultTypeParameter(compilation, EntityType.Method, 0, "T");
+			IType stringType = compilation.FindType(KnownTypeCode.String);
+			ITypeDefinition readOnlyListType = compilation.FindType(KnownTypeCode.IReadOnlyListOfT).GetDefinition();
+			if (readOnlyListType == null)
+				Assert.Ignore(".NET 4.5 IReadOnlyList not available");
+			
+			bool success;
+			Assert.AreEqual(
+				new [] { stringType },
+				ti.InferTypeArguments(new [] { tp },
+				                      new [] { new ResolveResult(new ArrayType(compilation, stringType)) },
+				                      new [] { new ParameterizedType(readOnlyListType, new [] { tp }) },
+				                      out success));
+			Assert.IsTrue(success);
+		}
+		
 		[Test]
 		public void EnumerableToArrayInContravariantType()
 		{