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authorJason Smith <jason.smith@xamarin.com>2016-03-22 13:02:25 -0700
committerJason Smith <jason.smith@xamarin.com>2016-03-22 16:13:41 -0700
commit17fdde66d94155fc62a034fa6658995bef6fd6e5 (patch)
treeb5e5073a2a7b15cdbe826faa5c763e270a505729 /ICSharpCode.Decompiler/Ast/Transforms/ContextTrackingVisitor.cs
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+// Copyright (c) 2011 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.Diagnostics;
+using ICSharpCode.NRefactory.CSharp;
+using Mono.Cecil;
+
+namespace ICSharpCode.Decompiler.Ast.Transforms
+{
+ /// <summary>
+ /// Base class for AST visitors that need the current type/method context info.
+ /// </summary>
+ public abstract class ContextTrackingVisitor<TResult> : DepthFirstAstVisitor<object, TResult>, IAstTransform
+ {
+ protected readonly DecompilerContext context;
+
+ protected ContextTrackingVisitor(DecompilerContext context)
+ {
+ if (context == null)
+ throw new ArgumentNullException("context");
+ this.context = context;
+ }
+
+ public override TResult VisitTypeDeclaration(TypeDeclaration typeDeclaration, object data)
+ {
+ TypeDefinition oldType = context.CurrentType;
+ try {
+ context.CurrentType = typeDeclaration.Annotation<TypeDefinition>();
+ return base.VisitTypeDeclaration(typeDeclaration, data);
+ } finally {
+ context.CurrentType = oldType;
+ }
+ }
+
+ public override TResult VisitMethodDeclaration(MethodDeclaration methodDeclaration, object data)
+ {
+ Debug.Assert(context.CurrentMethod == null);
+ try {
+ context.CurrentMethod = methodDeclaration.Annotation<MethodDefinition>();
+ return base.VisitMethodDeclaration(methodDeclaration, data);
+ } finally {
+ context.CurrentMethod = null;
+ }
+ }
+
+ public override TResult VisitConstructorDeclaration(ConstructorDeclaration constructorDeclaration, object data)
+ {
+ Debug.Assert(context.CurrentMethod == null);
+ try {
+ context.CurrentMethod = constructorDeclaration.Annotation<MethodDefinition>();
+ return base.VisitConstructorDeclaration(constructorDeclaration, data);
+ } finally {
+ context.CurrentMethod = null;
+ }
+ }
+
+ public override TResult VisitDestructorDeclaration(DestructorDeclaration destructorDeclaration, object data)
+ {
+ Debug.Assert(context.CurrentMethod == null);
+ try {
+ context.CurrentMethod = destructorDeclaration.Annotation<MethodDefinition>();
+ return base.VisitDestructorDeclaration(destructorDeclaration, data);
+ } finally {
+ context.CurrentMethod = null;
+ }
+ }
+
+ public override TResult VisitOperatorDeclaration(OperatorDeclaration operatorDeclaration, object data)
+ {
+ Debug.Assert(context.CurrentMethod == null);
+ try {
+ context.CurrentMethod = operatorDeclaration.Annotation<MethodDefinition>();
+ return base.VisitOperatorDeclaration(operatorDeclaration, data);
+ } finally {
+ context.CurrentMethod = null;
+ }
+ }
+
+ public override TResult VisitAccessor(Accessor accessor, object data)
+ {
+ Debug.Assert(context.CurrentMethod == null);
+ try {
+ context.CurrentMethod = accessor.Annotation<MethodDefinition>();
+ return base.VisitAccessor(accessor, data);
+ } finally {
+ context.CurrentMethod = null;
+ }
+ }
+
+ void IAstTransform.Run(AstNode node)
+ {
+ node.AcceptVisitor(this, null);
+ }
+ }
+}