/// <summary>
/// If representative member is non-null and is contained in a constructed type, then find
/// other members in the same type with the same signature. If this is an override member,
/// add them to the overridden and runtime overridden lists. Otherwise, add them to the
/// hidden list.
/// </summary>
private static void FindRelatedMembers(
bool isOverride,
bool overridingMemberIsFromSomeCompilation,
LanguageSymbolKind overridingMemberKind,
Symbol representativeMember,
out ImmutableArray <Symbol> overriddenMembers,
out ImmutableArray <Symbol> runtimeOverriddenMembers,
ref ArrayBuilder <Symbol> hiddenBuilder)
{
overriddenMembers = ImmutableArray <Symbol> .Empty;
runtimeOverriddenMembers = ImmutableArray <Symbol> .Empty;
if ((object)representativeMember != null)
{
bool needToSearchForRelated = !representativeMember.ContainingType.IsDefinition;
if (isOverride)
{
if (needToSearchForRelated)
{
ArrayBuilder <Symbol> overriddenBuilder = ArrayBuilder <Symbol> .GetInstance();
ArrayBuilder <Symbol> runtimeOverriddenBuilder = ArrayBuilder <Symbol> .GetInstance();
overriddenBuilder.Add(representativeMember);
runtimeOverriddenBuilder.Add(representativeMember);
FindOtherOverriddenMethodsInContainingType(representativeMember, overridingMemberIsFromSomeCompilation, overriddenBuilder, runtimeOverriddenBuilder);
overriddenMembers = overriddenBuilder.ToImmutableAndFree();
runtimeOverriddenMembers = runtimeOverriddenBuilder.ToImmutableAndFree();
}
else
{
overriddenMembers = ImmutableArray.Create <Symbol>(representativeMember);
runtimeOverriddenMembers = overriddenMembers;
}
}
else
{
AddHiddenMemberIfApplicable(ref hiddenBuilder, overridingMemberKind, representativeMember);
if (needToSearchForRelated)
{
FindOtherHiddenMembersInContainingType(overridingMemberKind, representativeMember, ref hiddenBuilder);
}
}
}
}
public virtual CSharpSymbolKind ToCSharpKind(LanguageSymbolKind kind)
{
switch (kind.Switch())
{
case LanguageSymbolKind.Assembly:
return(CSharpSymbolKind.Assembly);
case LanguageSymbolKind.NetModule:
return(CSharpSymbolKind.NetModule);
case LanguageSymbolKind.Alias:
return(CSharpSymbolKind.Alias);
case LanguageSymbolKind.Namespace:
return(CSharpSymbolKind.Namespace);
case LanguageSymbolKind.NamedType:
return(CSharpSymbolKind.NamedType);
case LanguageSymbolKind.Property:
return(CSharpSymbolKind.Property);
case LanguageSymbolKind.Operation:
return(CSharpSymbolKind.Method);
case LanguageSymbolKind.ErrorType:
return(CSharpSymbolKind.ErrorType);
case LanguageSymbolKind.Name:
return(CSharpSymbolKind.Namespace);
case LanguageSymbolKind.DynamicType:
return(CSharpSymbolKind.DynamicType);
case LanguageSymbolKind.ConstructedType:
return(CSharpSymbolKind.ArrayType);
case LanguageSymbolKind.None:
return(CSharpSymbolKind.ErrorType);
default:
throw new ArgumentException("Unexpected symbol kind: " + kind.ToString(), nameof(kind));
}
}
/// <summary>
/// Look for overridden or hidden members in a specific type.
/// </summary>
/// <param name="member">Member that is hiding or overriding.</param>
/// <param name="memberIsFromSomeCompilation">True if member is from the current compilation.</param>
/// <param name="memberContainingType">The type that contains member (member.ContainingType).</param>
/// <param name="currType">The type to search.</param>
/// <param name="currTypeBestMatch">
/// A member with the same signature if currTypeHasExactMatch is true,
/// a member with (a minimal number of) different custom modifiers if there is one,
/// and null otherwise.</param>
/// <param name="currTypeHasSameKindNonMatch">True if there's a member with the same name and kind that is not a match.</param>
/// <param name="hiddenBuilder">Hidden members (same name, different kind) will be added to this builder.</param>
/// <remarks>
/// There is some similarity between this member and TypeSymbol.FindPotentialImplicitImplementationMemberDeclaredInType.
/// When making changes to this member, think about whether or not they should also be applied in TypeSymbol.
///
/// In incorrect or imported code, it is possible that both currTypeBestMatch and hiddenBuilder will be populated.
/// </remarks>
private static void FindOverriddenOrHiddenMembersInType(
Symbol member,
bool memberIsFromSomeCompilation,
NamedTypeSymbol memberContainingType,
NamedTypeSymbol currType,
out Symbol currTypeBestMatch,
out bool currTypeHasSameKindNonMatch,
out ArrayBuilder <Symbol> hiddenBuilder)
{
currTypeBestMatch = null;
currTypeHasSameKindNonMatch = false;
hiddenBuilder = null;
bool currTypeHasExactMatch = false;
LanguageSymbolKind memberKind = member.Kind;
foreach (Symbol otherMember in currType.GetMembers(member.Name))
{
if (!IsOverriddenSymbolAccessible(otherMember, memberContainingType))
{
//do nothing
}
else if (otherMember.Kind != memberKind)
{
//do nothing
}
else if (!currTypeHasExactMatch)
{
if (MatchesOverride(member, otherMember))
{
currTypeHasExactMatch = true;
currTypeBestMatch = otherMember;
}
else
{
currTypeHasSameKindNonMatch = true;
}
}
}
}
/// <summary>
/// Having found that we are hiding a method with exactly the same signature
/// (including custom modifiers), we want to find methods with the same signature
/// on the declaring type because they will also be hidden.
/// (If the declaring type is constructed, it's possible that two or more
/// methods have the same signature (including custom modifiers).)
/// (If the representative member is an indexer, it's possible that two or more
/// properties have the same signature (including custom modifiers, even in a
/// non-generic type).
/// </summary>
/// <param name="hidingMemberKind">
/// This kind of the hiding member.
/// </param>
/// <param name="representativeMember">
/// The member that we consider to be hidden (must have exactly the same custom modifiers as the hiding member).
/// Assumed to already be in hiddenBuilder.
/// </param>
/// <param name="hiddenBuilder">
/// Will have all other members with the same signature (including custom modifiers) as
/// representativeMember added.
/// </param>
private static void FindOtherHiddenMembersInContainingType(LanguageSymbolKind hidingMemberKind, Symbol representativeMember, ref ArrayBuilder <Symbol> hiddenBuilder)
{
Debug.Assert((object)representativeMember != null);
}
/// <summary>
/// Some kinds of methods are not considered to be hideable by certain kinds of members.
/// Specifically, methods, properties, and types cannot hide constructors, destructors,
/// operators, conversions, or accessors.
/// </summary>
private static void AddHiddenMemberIfApplicable(ref ArrayBuilder <Symbol> hiddenBuilder, LanguageSymbolKind hidingMemberKind, Symbol hiddenMember)
{
Debug.Assert((object)hiddenMember != null);
AccessOrGetInstance(ref hiddenBuilder).Add(hiddenMember);
}