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-rw-r--r--Rx.NET/System.Reactive.Providers/Reactive/Linq/ExpressionVisitor.cs373
1 files changed, 0 insertions, 373 deletions
diff --git a/Rx.NET/System.Reactive.Providers/Reactive/Linq/ExpressionVisitor.cs b/Rx.NET/System.Reactive.Providers/Reactive/Linq/ExpressionVisitor.cs
deleted file mode 100644
index e3ef1e4..0000000
--- a/Rx.NET/System.Reactive.Providers/Reactive/Linq/ExpressionVisitor.cs
+++ /dev/null
@@ -1,373 +0,0 @@
-// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
-
-#if NO_EXPRESSIONVISITOR
-
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.Reflection;
-using System.Linq.Expressions;
-
-namespace System.Reactive.Linq
-{
- internal abstract class ExpressionVisitor
- {
- internal ExpressionVisitor()
- {
- }
-
- public virtual Expression Visit(Expression exp)
- {
- if (exp == null)
- return exp;
- switch (exp.NodeType)
- {
- case ExpressionType.UnaryPlus:
- case ExpressionType.Negate:
- case ExpressionType.NegateChecked:
- case ExpressionType.Not:
- case ExpressionType.Convert:
- case ExpressionType.ConvertChecked:
- case ExpressionType.ArrayLength:
- case ExpressionType.Quote:
- case ExpressionType.TypeAs:
- return this.VisitUnary((UnaryExpression)exp);
- case ExpressionType.Add:
- case ExpressionType.AddChecked:
- case ExpressionType.Subtract:
- case ExpressionType.SubtractChecked:
- case ExpressionType.Multiply:
- case ExpressionType.MultiplyChecked:
- case ExpressionType.Divide:
- case ExpressionType.Modulo:
- case ExpressionType.Power:
- case ExpressionType.And:
- case ExpressionType.AndAlso:
- case ExpressionType.Or:
- case ExpressionType.OrElse:
- case ExpressionType.LessThan:
- case ExpressionType.LessThanOrEqual:
- case ExpressionType.GreaterThan:
- case ExpressionType.GreaterThanOrEqual:
- case ExpressionType.Equal:
- case ExpressionType.NotEqual:
- case ExpressionType.Coalesce:
- case ExpressionType.ArrayIndex:
- case ExpressionType.RightShift:
- case ExpressionType.LeftShift:
- case ExpressionType.ExclusiveOr:
- return this.VisitBinary((BinaryExpression)exp);
- case ExpressionType.TypeIs:
- return this.VisitTypeIs((TypeBinaryExpression)exp);
- case ExpressionType.Conditional:
- return this.VisitConditional((ConditionalExpression)exp);
- case ExpressionType.Constant:
- return this.VisitConstant((ConstantExpression)exp);
- case ExpressionType.Parameter:
- return this.VisitParameter((ParameterExpression)exp);
- case ExpressionType.MemberAccess:
- return this.VisitMemberAccess((MemberExpression)exp);
- case ExpressionType.Call:
- return this.VisitMethodCall((MethodCallExpression)exp);
- case ExpressionType.Lambda:
- return this.VisitLambda((LambdaExpression)exp);
- case ExpressionType.New:
- return this.VisitNew((NewExpression)exp);
- case ExpressionType.NewArrayInit:
- case ExpressionType.NewArrayBounds:
- return this.VisitNewArray((NewArrayExpression)exp);
- case ExpressionType.Invoke:
- return this.VisitInvocation((InvocationExpression)exp);
- case ExpressionType.MemberInit:
- return this.VisitMemberInit((MemberInitExpression)exp);
- case ExpressionType.ListInit:
- return this.VisitListInit((ListInitExpression)exp);
- default:
- throw new InvalidOperationException();
- }
- }
-
- protected virtual MemberBinding VisitBinding(MemberBinding binding)
- {
- switch (binding.BindingType)
- {
- case MemberBindingType.Assignment:
- return this.VisitMemberAssignment((MemberAssignment)binding);
- case MemberBindingType.MemberBinding:
- return this.VisitMemberMemberBinding((MemberMemberBinding)binding);
- case MemberBindingType.ListBinding:
- return this.VisitMemberListBinding((MemberListBinding)binding);
- default:
- throw new InvalidOperationException();
- }
- }
-
- protected virtual ElementInit VisitElementInitializer(ElementInit initializer)
- {
- ReadOnlyCollection<Expression> arguments = this.VisitExpressionList(initializer.Arguments);
- if (arguments != initializer.Arguments)
- {
- return Expression.ElementInit(initializer.AddMethod, arguments);
- }
- return initializer;
- }
-
- protected virtual Expression VisitUnary(UnaryExpression u)
- {
- Expression operand = this.Visit(u.Operand);
- if (operand != u.Operand)
- {
- return Expression.MakeUnary(u.NodeType, operand, u.Type, u.Method);
- }
- return u;
- }
-
- protected virtual Expression VisitBinary(BinaryExpression b)
- {
- Expression left = this.Visit(b.Left);
- Expression right = this.Visit(b.Right);
- Expression conversion = this.Visit(b.Conversion);
- if (left != b.Left || right != b.Right || conversion != b.Conversion)
- {
- if (b.NodeType == ExpressionType.Coalesce && b.Conversion != null)
- return Expression.Coalesce(left, right, conversion as LambdaExpression);
- else
- return Expression.MakeBinary(b.NodeType, left, right, b.IsLiftedToNull, b.Method);
- }
- return b;
- }
-
- protected virtual Expression VisitTypeIs(TypeBinaryExpression b)
- {
- Expression expr = this.Visit(b.Expression);
- if (expr != b.Expression)
- {
- return Expression.TypeIs(expr, b.TypeOperand);
- }
- return b;
- }
-
- protected virtual Expression VisitConstant(ConstantExpression c)
- {
- return c;
- }
-
- protected virtual Expression VisitConditional(ConditionalExpression c)
- {
- Expression test = this.Visit(c.Test);
- Expression ifTrue = this.Visit(c.IfTrue);
- Expression ifFalse = this.Visit(c.IfFalse);
- if (test != c.Test || ifTrue != c.IfTrue || ifFalse != c.IfFalse)
- {
- return Expression.Condition(test, ifTrue, ifFalse);
- }
- return c;
- }
-
- protected virtual Expression VisitParameter(ParameterExpression p)
- {
- return p;
- }
-
- protected virtual Expression VisitMemberAccess(MemberExpression m)
- {
- Expression exp = this.Visit(m.Expression);
- if (exp != m.Expression)
- {
- return Expression.MakeMemberAccess(exp, m.Member);
- }
- return m;
- }
-
- protected virtual Expression VisitMethodCall(MethodCallExpression m)
- {
- Expression obj = this.Visit(m.Object);
- IEnumerable<Expression> args = this.VisitExpressionList(m.Arguments);
- if (obj != m.Object || args != m.Arguments)
- {
- return Expression.Call(obj, m.Method, args);
- }
- return m;
- }
-
- protected virtual ReadOnlyCollection<Expression> VisitExpressionList(ReadOnlyCollection<Expression> original)
- {
- List<Expression> list = null;
- for (int i = 0, n = original.Count; i < n; i++)
- {
- Expression p = this.Visit(original[i]);
- if (list != null)
- {
- list.Add(p);
- }
- else if (p != original[i])
- {
- list = new List<Expression>(n);
- for (int j = 0; j < i; j++)
- {
- list.Add(original[j]);
- }
- list.Add(p);
- }
- }
- if (list != null)
- return new ReadOnlyCollection<Expression>(list);
- return original;
- }
-
- protected virtual MemberAssignment VisitMemberAssignment(MemberAssignment assignment)
- {
- Expression e = this.Visit(assignment.Expression);
- if (e != assignment.Expression)
- {
- return Expression.Bind(assignment.Member, e);
- }
- return assignment;
- }
-
- protected virtual MemberMemberBinding VisitMemberMemberBinding(MemberMemberBinding binding)
- {
- IEnumerable<MemberBinding> bindings = this.VisitBindingList(binding.Bindings);
- if (bindings != binding.Bindings)
- {
- return Expression.MemberBind(binding.Member, bindings);
- }
- return binding;
- }
-
- protected virtual MemberListBinding VisitMemberListBinding(MemberListBinding binding)
- {
- IEnumerable<ElementInit> initializers = this.VisitElementInitializerList(binding.Initializers);
- if (initializers != binding.Initializers)
- {
- return Expression.ListBind(binding.Member, initializers);
- }
- return binding;
- }
-
- protected virtual IEnumerable<MemberBinding> VisitBindingList(ReadOnlyCollection<MemberBinding> original)
- {
- List<MemberBinding> list = null;
- for (int i = 0, n = original.Count; i < n; i++)
- {
- MemberBinding b = this.VisitBinding(original[i]);
- if (list != null)
- {
- list.Add(b);
- }
- else if (b != original[i])
- {
- list = new List<MemberBinding>(n);
- for (int j = 0; j < i; j++)
- {
- list.Add(original[j]);
- }
- list.Add(b);
- }
- }
- if (list != null)
- return list;
- return original;
- }
-
- protected virtual IEnumerable<ElementInit> VisitElementInitializerList(ReadOnlyCollection<ElementInit> original)
- {
- List<ElementInit> list = null;
- for (int i = 0, n = original.Count; i < n; i++)
- {
- ElementInit init = this.VisitElementInitializer(original[i]);
- if (list != null)
- {
- list.Add(init);
- }
- else if (init != original[i])
- {
- list = new List<ElementInit>(n);
- for (int j = 0; j < i; j++)
- {
- list.Add(original[j]);
- }
- list.Add(init);
- }
- }
- if (list != null)
- return list;
- return original;
- }
-
- protected virtual Expression VisitLambda(LambdaExpression lambda)
- {
- Expression body = this.Visit(lambda.Body);
- if (body != lambda.Body)
- {
- return Expression.Lambda(lambda.Type, body, lambda.Parameters);
- }
- return lambda;
- }
-
- protected virtual NewExpression VisitNew(NewExpression nex)
- {
- IEnumerable<Expression> args = this.VisitExpressionList(nex.Arguments);
- if (args != nex.Arguments)
- {
- if (nex.Members != null)
- return Expression.New(nex.Constructor, args, nex.Members);
- else
- return Expression.New(nex.Constructor, args);
- }
- return nex;
- }
-
- protected virtual Expression VisitMemberInit(MemberInitExpression init)
- {
- NewExpression n = this.VisitNew(init.NewExpression);
- IEnumerable<MemberBinding> bindings = this.VisitBindingList(init.Bindings);
- if (n != init.NewExpression || bindings != init.Bindings)
- {
- return Expression.MemberInit(n, bindings);
- }
- return init;
- }
-
- protected virtual Expression VisitListInit(ListInitExpression init)
- {
- NewExpression n = this.VisitNew(init.NewExpression);
- IEnumerable<ElementInit> initializers = this.VisitElementInitializerList(init.Initializers);
- if (n != init.NewExpression || initializers != init.Initializers)
- {
- return Expression.ListInit(n, initializers);
- }
- return init;
- }
-
- protected virtual Expression VisitNewArray(NewArrayExpression na)
- {
- IEnumerable<Expression> exprs = this.VisitExpressionList(na.Expressions);
- if (exprs != na.Expressions)
- {
- if (na.NodeType == ExpressionType.NewArrayInit)
- {
- return Expression.NewArrayInit(na.Type.GetElementType(), exprs);
- }
- else
- {
- return Expression.NewArrayBounds(na.Type.GetElementType(), exprs);
- }
- }
- return na;
- }
-
- protected virtual Expression VisitInvocation(InvocationExpression iv)
- {
- IEnumerable<Expression> args = this.VisitExpressionList(iv.Arguments);
- Expression expr = this.Visit(iv.Expression);
- if (args != iv.Arguments || expr != iv.Expression)
- {
- return Expression.Invoke(expr, args);
- }
- return iv;
- }
- }
-}
-
-#endif \ No newline at end of file
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