blob: 4062edc014371a7f7a084d7297d95a626ad78f96 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Linq.Expressions;
namespace System.Web.Mvc.ExpressionUtil
{
// Serves as the base class for all expression fingerprints. Provides a default implementation
// of GetHashCode().
internal abstract class ExpressionFingerprint
{
protected ExpressionFingerprint(ExpressionType nodeType, Type type)
{
NodeType = nodeType;
Type = type;
}
// the type of expression node, e.g. OP_ADD, MEMBER_ACCESS, etc.
public ExpressionType NodeType { get; private set; }
// the CLR type resulting from this expression, e.g. int, string, etc.
public Type Type { get; private set; }
internal virtual void AddToHashCodeCombiner(HashCodeCombiner combiner)
{
combiner.AddInt32((int)NodeType);
combiner.AddObject(Type);
}
protected bool Equals(ExpressionFingerprint other)
{
return (other != null)
&& (this.NodeType == other.NodeType)
&& Equals(this.Type, other.Type);
}
public override bool Equals(object obj)
{
return Equals(obj as ExpressionFingerprint);
}
public override int GetHashCode()
{
HashCodeCombiner combiner = new HashCodeCombiner();
AddToHashCodeCombiner(combiner);
return combiner.CombinedHash;
}
}
}
|