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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Linq;
using System.Text;
using ICSharpCode.NRefactory.TypeSystem.Implementation;
namespace ICSharpCode.NRefactory.TypeSystem
{
/// <summary>
/// Represents the intersection of several types.
/// </summary>
public class IntersectionType : AbstractType
{
readonly ReadOnlyCollection<IType> types;
public ReadOnlyCollection<IType> Types {
get { return types; }
}
private IntersectionType(IType[] types)
{
Debug.Assert(types.Length >= 2);
this.types = Array.AsReadOnly(types);
}
public static IType Create(IEnumerable<IType> types)
{
IType[] arr = types.Distinct().ToArray();
foreach (IType type in arr) {
if (type == null)
throw new ArgumentNullException();
}
if (arr.Length == 0)
return SpecialType.UnknownType;
else if (arr.Length == 1)
return arr[0];
else
return new IntersectionType(arr);
}
public override TypeKind Kind {
get { return TypeKind.Intersection; }
}
public override string Name {
get {
StringBuilder b = new StringBuilder();
foreach (var t in types) {
if (b.Length > 0)
b.Append(" & ");
b.Append(t.Name);
}
return b.ToString();
}
}
public override string ReflectionName {
get {
StringBuilder b = new StringBuilder();
foreach (var t in types) {
if (b.Length > 0)
b.Append(" & ");
b.Append(t.ReflectionName);
}
return b.ToString();
}
}
public override bool? IsReferenceType {
get {
foreach (var t in types) {
bool? isReferenceType = t.IsReferenceType;
if (isReferenceType.HasValue)
return isReferenceType.Value;
}
return null;
}
}
public override int GetHashCode()
{
int hashCode = 0;
unchecked {
foreach (var t in types) {
hashCode *= 7137517;
hashCode += t.GetHashCode();
}
}
return hashCode;
}
public override bool Equals(IType other)
{
IntersectionType o = other as IntersectionType;
if (o != null && types.Count == o.types.Count) {
for (int i = 0; i < types.Count; i++) {
if (!types[i].Equals(o.types[i]))
return false;
}
return true;
}
return false;
}
public override IEnumerable<IType> DirectBaseTypes {
get { return types; }
}
public override ITypeReference ToTypeReference()
{
throw new NotSupportedException();
}
public override IEnumerable<IMethod> GetMethods(Predicate<IUnresolvedMethod> filter, GetMemberOptions options)
{
return GetMembersHelper.GetMethods(this, FilterNonStatic(filter), options);
}
public override IEnumerable<IMethod> GetMethods(IList<IType> typeArguments, Predicate<IUnresolvedMethod> filter, GetMemberOptions options)
{
return GetMembersHelper.GetMethods(this, typeArguments, filter, options);
}
public override IEnumerable<IProperty> GetProperties(Predicate<IUnresolvedProperty> filter, GetMemberOptions options)
{
return GetMembersHelper.GetProperties(this, FilterNonStatic(filter), options);
}
public override IEnumerable<IField> GetFields(Predicate<IUnresolvedField> filter, GetMemberOptions options)
{
return GetMembersHelper.GetFields(this, FilterNonStatic(filter), options);
}
public override IEnumerable<IEvent> GetEvents(Predicate<IUnresolvedEvent> filter, GetMemberOptions options)
{
return GetMembersHelper.GetEvents(this, FilterNonStatic(filter), options);
}
public override IEnumerable<IMember> GetMembers(Predicate<IUnresolvedMember> filter, GetMemberOptions options)
{
return GetMembersHelper.GetMembers(this, FilterNonStatic(filter), options);
}
static Predicate<T> FilterNonStatic<T>(Predicate<T> filter) where T : class, IUnresolvedMember
{
if (filter == null)
return member => !member.IsStatic;
else
return member => !member.IsStatic && filter(member);
}
}
}
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