Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DLinq / Dlinq / SqlClient / Query / Funcletizer.cs / 1305376 / Funcletizer.cs
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Linq.Expressions;
namespace System.Data.Linq.SqlClient {
using System.Data.Linq.Mapping;
using System.Diagnostics.CodeAnalysis;
internal static class Funcletizer {
internal static Expression Funcletize(Expression expression) {
return new Localizer(new LocalMapper().MapLocals(expression)).Localize(expression);
}
class Localizer : ExpressionVisitor {
Dictionary locals;
internal Localizer(Dictionary locals) {
this.locals = locals;
}
internal Expression Localize(Expression expression) {
return this.Visit(expression);
}
internal override Expression Visit(Expression exp) {
if (exp == null) {
return null;
}
if (this.locals.ContainsKey(exp)) {
return MakeLocal(exp);
}
if (exp.NodeType == (ExpressionType)InternalExpressionType.Known) {
return exp;
}
return base.Visit(exp);
}
private static Expression MakeLocal(Expression e) {
if (e.NodeType == ExpressionType.Constant) {
return e;
}
else if (e.NodeType == ExpressionType.Convert || e.NodeType == ExpressionType.ConvertChecked) {
UnaryExpression ue = (UnaryExpression)e;
if (ue.Type == typeof(object)) {
Expression local = MakeLocal(ue.Operand);
return (e.NodeType == ExpressionType.Convert) ? Expression.Convert(local, e.Type) : Expression.ConvertChecked(local, e.Type);
}
// convert a const null
if (ue.Operand.NodeType == ExpressionType.Constant) {
ConstantExpression c = (ConstantExpression)ue.Operand;
if (c.Value == null) {
return Expression.Constant(null, ue.Type);
}
}
}
return Expression.Invoke(Expression.Constant(Expression.Lambda(e).Compile()));
}
}
class DependenceChecker : ExpressionVisitor {
HashSet inScope = new HashSet();
bool isIndependent = true;
///
/// This method returns 'true' when the expression doesn't reference any parameters
/// from outside the scope of the expression.
///
static public bool IsIndependent(Expression expression) {
var v = new DependenceChecker();
v.Visit(expression);
return v.isIndependent;
}
internal override Expression VisitLambda(LambdaExpression lambda) {
foreach (var p in lambda.Parameters) {
this.inScope.Add(p);
}
return base.VisitLambda(lambda);
}
internal override Expression VisitParameter(ParameterExpression p) {
this.isIndependent &= this.inScope.Contains(p);
return p;
}
}
class LocalMapper : ExpressionVisitor {
bool isRemote;
Dictionary locals;
internal Dictionary MapLocals(Expression expression) {
this.locals = new Dictionary();
this.isRemote = false;
this.Visit(expression);
return this.locals;
}
internal override Expression Visit(Expression expression) {
if (expression == null) {
return null;
}
bool saveIsRemote = this.isRemote;
switch (expression.NodeType) {
case (ExpressionType)InternalExpressionType.Known:
return expression;
case (ExpressionType)ExpressionType.Constant:
break;
default:
this.isRemote = false;
base.Visit(expression);
if (!this.isRemote
&& expression.NodeType != ExpressionType.Lambda
&& expression.NodeType != ExpressionType.Quote
&& DependenceChecker.IsIndependent(expression)) {
this.locals[expression] = true; // Not 'Add' because the same expression may exist in the tree twice.
}
break;
}
if (typeof(ITable).IsAssignableFrom(expression.Type) ||
typeof(DataContext).IsAssignableFrom(expression.Type)) {
this.isRemote = true;
}
this.isRemote |= saveIsRemote;
return expression;
}
internal override Expression VisitMemberAccess(MemberExpression m) {
base.VisitMemberAccess(m);
this.isRemote |= (m.Expression != null && typeof(ITable).IsAssignableFrom(m.Expression.Type));
return m;
}
internal override Expression VisitMethodCall(MethodCallExpression m) {
base.VisitMethodCall(m);
this.isRemote |= m.Method.DeclaringType == typeof(System.Data.Linq.Provider.DataManipulation)
|| Attribute.IsDefined(m.Method, typeof(FunctionAttribute));
return m;
}
}
}
internal abstract class ExpressionVisitor {
internal ExpressionVisitor() {
}
[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification = "These issues are related to our use of if-then and case statements for node types, which adds to the complexity count however when reviewed they are easy to navigate and understand.")]
[SuppressMessage("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily", Justification = "[....]: Cast is dependent on node type and casts do not happen unecessarily in a single code path.")]
internal virtual Expression Visit(Expression exp) {
if (exp == null)
return exp;
switch (exp.NodeType) {
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);
case ExpressionType.UnaryPlus:
if (exp.Type == typeof(TimeSpan))
return this.VisitUnary((UnaryExpression)exp);
throw Error.UnhandledExpressionType(exp.NodeType);
default:
throw Error.UnhandledExpressionType(exp.NodeType);
}
}
internal 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 Error.UnhandledBindingType(binding.BindingType);
}
}
internal virtual ElementInit VisitElementInitializer(ElementInit initializer) {
ReadOnlyCollection arguments = this.VisitExpressionList(initializer.Arguments);
if (arguments != initializer.Arguments) {
return Expression.ElementInit(initializer.AddMethod, arguments);
}
return initializer;
}
internal 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;
}
internal virtual Expression VisitBinary(BinaryExpression b) {
Expression left = this.Visit(b.Left);
Expression right = this.Visit(b.Right);
if (left != b.Left || right != b.Right) {
return Expression.MakeBinary(b.NodeType, left, right, b.IsLiftedToNull, b.Method);
}
return b;
}
internal virtual Expression VisitTypeIs(TypeBinaryExpression b) {
Expression expr = this.Visit(b.Expression);
if (expr != b.Expression) {
return Expression.TypeIs(expr, b.TypeOperand);
}
return b;
}
internal virtual Expression VisitConstant(ConstantExpression c) {
return c;
}
internal 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;
}
internal virtual Expression VisitParameter(ParameterExpression p) {
return p;
}
internal virtual Expression VisitMemberAccess(MemberExpression m) {
Expression exp = this.Visit(m.Expression);
if (exp != m.Expression) {
return Expression.MakeMemberAccess(exp, m.Member);
}
return m;
}
internal virtual Expression VisitMethodCall(MethodCallExpression m) {
Expression obj = this.Visit(m.Object);
IEnumerable args = this.VisitExpressionList(m.Arguments);
if (obj != m.Object || args != m.Arguments) {
return Expression.Call(obj, m.Method, args);
}
return m;
}
internal virtual ReadOnlyCollection VisitExpressionList(ReadOnlyCollection original) {
List 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(n);
for (int j = 0; j < i; j++) {
list.Add(original[j]);
}
list.Add(p);
}
}
if (list != null)
return new ReadOnlyCollection(list);
return original;
}
internal virtual MemberAssignment VisitMemberAssignment(MemberAssignment assignment) {
Expression e = this.Visit(assignment.Expression);
if (e != assignment.Expression) {
return Expression.Bind(assignment.Member, e);
}
return assignment;
}
internal virtual MemberMemberBinding VisitMemberMemberBinding(MemberMemberBinding binding) {
IEnumerable bindings = this.VisitBindingList(binding.Bindings);
if (bindings != binding.Bindings) {
return Expression.MemberBind(binding.Member, bindings);
}
return binding;
}
internal virtual MemberListBinding VisitMemberListBinding(MemberListBinding binding) {
IEnumerable initializers = this.VisitElementInitializerList(binding.Initializers);
if (initializers != binding.Initializers) {
return Expression.ListBind(binding.Member, initializers);
}
return binding;
}
internal virtual IEnumerable VisitBindingList(ReadOnlyCollection original) {
List 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(n);
for (int j = 0; j < i; j++) {
list.Add(original[j]);
}
list.Add(b);
}
}
if (list != null)
return list;
return original;
}
internal virtual IEnumerable VisitElementInitializerList(ReadOnlyCollection original) {
List 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(n);
for (int j = 0; j < i; j++) {
list.Add(original[j]);
}
list.Add(init);
}
}
if (list != null) {
return list;
}
return original;
}
internal 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;
}
internal virtual NewExpression VisitNew(NewExpression nex) {
IEnumerable 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;
}
internal virtual Expression VisitMemberInit(MemberInitExpression init) {
NewExpression n = this.VisitNew(init.NewExpression);
IEnumerable bindings = this.VisitBindingList(init.Bindings);
if (n != init.NewExpression || bindings != init.Bindings) {
return Expression.MemberInit(n, bindings);
}
return init;
}
internal virtual Expression VisitListInit(ListInitExpression init) {
NewExpression n = this.VisitNew(init.NewExpression);
IEnumerable initializers = this.VisitElementInitializerList(init.Initializers);
if (n != init.NewExpression || initializers != init.Initializers) {
return Expression.ListInit(n, initializers);
}
return init;
}
internal virtual Expression VisitNewArray(NewArrayExpression na) {
IEnumerable 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;
}
internal virtual Expression VisitInvocation(InvocationExpression iv) {
IEnumerable 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;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Linq.Expressions;
namespace System.Data.Linq.SqlClient {
using System.Data.Linq.Mapping;
using System.Diagnostics.CodeAnalysis;
internal static class Funcletizer {
internal static Expression Funcletize(Expression expression) {
return new Localizer(new LocalMapper().MapLocals(expression)).Localize(expression);
}
class Localizer : ExpressionVisitor {
Dictionary locals;
internal Localizer(Dictionary locals) {
this.locals = locals;
}
internal Expression Localize(Expression expression) {
return this.Visit(expression);
}
internal override Expression Visit(Expression exp) {
if (exp == null) {
return null;
}
if (this.locals.ContainsKey(exp)) {
return MakeLocal(exp);
}
if (exp.NodeType == (ExpressionType)InternalExpressionType.Known) {
return exp;
}
return base.Visit(exp);
}
private static Expression MakeLocal(Expression e) {
if (e.NodeType == ExpressionType.Constant) {
return e;
}
else if (e.NodeType == ExpressionType.Convert || e.NodeType == ExpressionType.ConvertChecked) {
UnaryExpression ue = (UnaryExpression)e;
if (ue.Type == typeof(object)) {
Expression local = MakeLocal(ue.Operand);
return (e.NodeType == ExpressionType.Convert) ? Expression.Convert(local, e.Type) : Expression.ConvertChecked(local, e.Type);
}
// convert a const null
if (ue.Operand.NodeType == ExpressionType.Constant) {
ConstantExpression c = (ConstantExpression)ue.Operand;
if (c.Value == null) {
return Expression.Constant(null, ue.Type);
}
}
}
return Expression.Invoke(Expression.Constant(Expression.Lambda(e).Compile()));
}
}
class DependenceChecker : ExpressionVisitor {
HashSet inScope = new HashSet();
bool isIndependent = true;
///
/// This method returns 'true' when the expression doesn't reference any parameters
/// from outside the scope of the expression.
///
static public bool IsIndependent(Expression expression) {
var v = new DependenceChecker();
v.Visit(expression);
return v.isIndependent;
}
internal override Expression VisitLambda(LambdaExpression lambda) {
foreach (var p in lambda.Parameters) {
this.inScope.Add(p);
}
return base.VisitLambda(lambda);
}
internal override Expression VisitParameter(ParameterExpression p) {
this.isIndependent &= this.inScope.Contains(p);
return p;
}
}
class LocalMapper : ExpressionVisitor {
bool isRemote;
Dictionary locals;
internal Dictionary MapLocals(Expression expression) {
this.locals = new Dictionary();
this.isRemote = false;
this.Visit(expression);
return this.locals;
}
internal override Expression Visit(Expression expression) {
if (expression == null) {
return null;
}
bool saveIsRemote = this.isRemote;
switch (expression.NodeType) {
case (ExpressionType)InternalExpressionType.Known:
return expression;
case (ExpressionType)ExpressionType.Constant:
break;
default:
this.isRemote = false;
base.Visit(expression);
if (!this.isRemote
&& expression.NodeType != ExpressionType.Lambda
&& expression.NodeType != ExpressionType.Quote
&& DependenceChecker.IsIndependent(expression)) {
this.locals[expression] = true; // Not 'Add' because the same expression may exist in the tree twice.
}
break;
}
if (typeof(ITable).IsAssignableFrom(expression.Type) ||
typeof(DataContext).IsAssignableFrom(expression.Type)) {
this.isRemote = true;
}
this.isRemote |= saveIsRemote;
return expression;
}
internal override Expression VisitMemberAccess(MemberExpression m) {
base.VisitMemberAccess(m);
this.isRemote |= (m.Expression != null && typeof(ITable).IsAssignableFrom(m.Expression.Type));
return m;
}
internal override Expression VisitMethodCall(MethodCallExpression m) {
base.VisitMethodCall(m);
this.isRemote |= m.Method.DeclaringType == typeof(System.Data.Linq.Provider.DataManipulation)
|| Attribute.IsDefined(m.Method, typeof(FunctionAttribute));
return m;
}
}
}
internal abstract class ExpressionVisitor {
internal ExpressionVisitor() {
}
[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification = "These issues are related to our use of if-then and case statements for node types, which adds to the complexity count however when reviewed they are easy to navigate and understand.")]
[SuppressMessage("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily", Justification = "[....]: Cast is dependent on node type and casts do not happen unecessarily in a single code path.")]
internal virtual Expression Visit(Expression exp) {
if (exp == null)
return exp;
switch (exp.NodeType) {
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);
case ExpressionType.UnaryPlus:
if (exp.Type == typeof(TimeSpan))
return this.VisitUnary((UnaryExpression)exp);
throw Error.UnhandledExpressionType(exp.NodeType);
default:
throw Error.UnhandledExpressionType(exp.NodeType);
}
}
internal 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 Error.UnhandledBindingType(binding.BindingType);
}
}
internal virtual ElementInit VisitElementInitializer(ElementInit initializer) {
ReadOnlyCollection arguments = this.VisitExpressionList(initializer.Arguments);
if (arguments != initializer.Arguments) {
return Expression.ElementInit(initializer.AddMethod, arguments);
}
return initializer;
}
internal 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;
}
internal virtual Expression VisitBinary(BinaryExpression b) {
Expression left = this.Visit(b.Left);
Expression right = this.Visit(b.Right);
if (left != b.Left || right != b.Right) {
return Expression.MakeBinary(b.NodeType, left, right, b.IsLiftedToNull, b.Method);
}
return b;
}
internal virtual Expression VisitTypeIs(TypeBinaryExpression b) {
Expression expr = this.Visit(b.Expression);
if (expr != b.Expression) {
return Expression.TypeIs(expr, b.TypeOperand);
}
return b;
}
internal virtual Expression VisitConstant(ConstantExpression c) {
return c;
}
internal 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;
}
internal virtual Expression VisitParameter(ParameterExpression p) {
return p;
}
internal virtual Expression VisitMemberAccess(MemberExpression m) {
Expression exp = this.Visit(m.Expression);
if (exp != m.Expression) {
return Expression.MakeMemberAccess(exp, m.Member);
}
return m;
}
internal virtual Expression VisitMethodCall(MethodCallExpression m) {
Expression obj = this.Visit(m.Object);
IEnumerable args = this.VisitExpressionList(m.Arguments);
if (obj != m.Object || args != m.Arguments) {
return Expression.Call(obj, m.Method, args);
}
return m;
}
internal virtual ReadOnlyCollection VisitExpressionList(ReadOnlyCollection original) {
List 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(n);
for (int j = 0; j < i; j++) {
list.Add(original[j]);
}
list.Add(p);
}
}
if (list != null)
return new ReadOnlyCollection(list);
return original;
}
internal virtual MemberAssignment VisitMemberAssignment(MemberAssignment assignment) {
Expression e = this.Visit(assignment.Expression);
if (e != assignment.Expression) {
return Expression.Bind(assignment.Member, e);
}
return assignment;
}
internal virtual MemberMemberBinding VisitMemberMemberBinding(MemberMemberBinding binding) {
IEnumerable bindings = this.VisitBindingList(binding.Bindings);
if (bindings != binding.Bindings) {
return Expression.MemberBind(binding.Member, bindings);
}
return binding;
}
internal virtual MemberListBinding VisitMemberListBinding(MemberListBinding binding) {
IEnumerable initializers = this.VisitElementInitializerList(binding.Initializers);
if (initializers != binding.Initializers) {
return Expression.ListBind(binding.Member, initializers);
}
return binding;
}
internal virtual IEnumerable VisitBindingList(ReadOnlyCollection original) {
List 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(n);
for (int j = 0; j < i; j++) {
list.Add(original[j]);
}
list.Add(b);
}
}
if (list != null)
return list;
return original;
}
internal virtual IEnumerable VisitElementInitializerList(ReadOnlyCollection original) {
List 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(n);
for (int j = 0; j < i; j++) {
list.Add(original[j]);
}
list.Add(init);
}
}
if (list != null) {
return list;
}
return original;
}
internal 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;
}
internal virtual NewExpression VisitNew(NewExpression nex) {
IEnumerable 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;
}
internal virtual Expression VisitMemberInit(MemberInitExpression init) {
NewExpression n = this.VisitNew(init.NewExpression);
IEnumerable bindings = this.VisitBindingList(init.Bindings);
if (n != init.NewExpression || bindings != init.Bindings) {
return Expression.MemberInit(n, bindings);
}
return init;
}
internal virtual Expression VisitListInit(ListInitExpression init) {
NewExpression n = this.VisitNew(init.NewExpression);
IEnumerable initializers = this.VisitElementInitializerList(init.Initializers);
if (n != init.NewExpression || initializers != init.Initializers) {
return Expression.ListInit(n, initializers);
}
return init;
}
internal virtual Expression VisitNewArray(NewArrayExpression na) {
IEnumerable 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;
}
internal virtual Expression VisitInvocation(InvocationExpression iv) {
IEnumerable 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;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ConfigurationStrings.cs
- RelatedView.cs
- HttpConfigurationSystem.cs
- HttpRuntime.cs
- SoapDocumentMethodAttribute.cs
- BrowsableAttribute.cs
- DefaultAssemblyResolver.cs
- ShaderRenderModeValidation.cs
- BaseTemplateParser.cs
- KeyValueConfigurationCollection.cs
- HttpModuleAction.cs
- FlowDocumentReader.cs
- HyperLink.cs
- RootProfilePropertySettingsCollection.cs
- VolatileResourceManager.cs
- HttpCookie.cs
- ValueQuery.cs
- X509InitiatorCertificateClientElement.cs
- SqlCommand.cs
- printdlgexmarshaler.cs
- ProviderException.cs
- TypeBuilderInstantiation.cs
- StrongNameIdentityPermission.cs
- DotNetATv1WindowsLogEntrySerializer.cs
- DebugView.cs
- LinkDescriptor.cs
- WpfGeneratedKnownProperties.cs
- PointAnimationBase.cs
- SystemGatewayIPAddressInformation.cs
- IDQuery.cs
- BinHexEncoder.cs
- GradientBrush.cs
- CompositeTypefaceMetrics.cs
- AttributeAction.cs
- WindowsFormsHelpers.cs
- PropertyGeneratedEventArgs.cs
- PolicyStatement.cs
- ReadOnlyCollectionBase.cs
- X509PeerCertificateAuthenticationElement.cs
- TiffBitmapEncoder.cs
- ActivityDelegate.cs
- ArgumentException.cs
- Viewport3DAutomationPeer.cs
- SessionStateModule.cs
- WebService.cs
- altserialization.cs
- ComponentEditorForm.cs
- ObjectStateEntry.cs
- ThumbButtonInfo.cs
- NavigateUrlConverter.cs
- AnnotationAdorner.cs
- WebServiceHost.cs
- Rotation3DAnimation.cs
- EventData.cs
- RenderOptions.cs
- clipboard.cs
- Condition.cs
- ResourceProviderFactory.cs
- ActiveXHelper.cs
- Ray3DHitTestResult.cs
- HttpStaticObjectsCollectionWrapper.cs
- XmlDigitalSignatureProcessor.cs
- AuthenticationService.cs
- Single.cs
- QuestionEventArgs.cs
- EarlyBoundInfo.cs
- BypassElementCollection.cs
- OdbcException.cs
- CultureTable.cs
- XmlSchemaGroup.cs
- InputBindingCollection.cs
- InvokeMethodActivityDesigner.cs
- IsolationInterop.cs
- DeflateInput.cs
- ObjectViewEntityCollectionData.cs
- PackageRelationshipSelector.cs
- ExtensionsSection.cs
- StrongName.cs
- XsltException.cs
- DateTimeOffsetConverter.cs
- DocumentViewerConstants.cs
- Sql8ExpressionRewriter.cs
- ErrorLog.cs
- CommandExpr.cs
- TypeConverterHelper.cs
- ToolStripItemImageRenderEventArgs.cs
- TagNameToTypeMapper.cs
- EntityContainerEmitter.cs
- AutomationIdentifier.cs
- IPHostEntry.cs
- Timer.cs
- AutoGeneratedField.cs
- WeakReadOnlyCollection.cs
- AdornerPresentationContext.cs
- HtmlInputImage.cs
- XmlConverter.cs
- SemaphoreFullException.cs
- IsolatedStorageFilePermission.cs
- MessageOperationFormatter.cs
- PointConverter.cs