Created
February 24, 2012 01:06
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ExpressionVisitorFirstStep
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bin/ | |
obj/ | |
*.user | |
*.suo |
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using System.Reflection; | |
using System.Runtime.CompilerServices; | |
using System.Runtime.InteropServices; | |
// アセンブリに関する一般情報は以下の属性セットをとおして制御されます。 | |
// アセンブリに関連付けられている情報を変更するには、 | |
// これらの属性値を変更してください。 | |
[assembly: AssemblyTitle("ConsoleApplication1")] | |
[assembly: AssemblyDescription("")] | |
[assembly: AssemblyConfiguration("")] | |
[assembly: AssemblyCompany("")] | |
[assembly: AssemblyProduct("ConsoleApplication1")] | |
[assembly: AssemblyCopyright("Copyright © 2012")] | |
[assembly: AssemblyTrademark("")] | |
[assembly: AssemblyCulture("")] | |
// ComVisible を false に設定すると、その型はこのアセンブリ内で COM コンポーネントから | |
// 参照不可能になります。COM からこのアセンブリ内の型にアクセスする場合は、 | |
// その型の ComVisible 属性を true に設定してください。 | |
[assembly: ComVisible(false)] | |
// 次の GUID は、このプロジェクトが COM に公開される場合の、typelib の ID です | |
[assembly: Guid("d7b85ad4-889a-4fc8-a128-3315d431036c")] | |
// アセンブリのバージョン情報は、以下の 4 つの値で構成されています: | |
// | |
// Major Version | |
// Minor Version | |
// Build Number | |
// Revision | |
// | |
// すべての値を指定するか、下のように '*' を使ってビルドおよびリビジョン番号を | |
// 既定値にすることができます: | |
// [assembly: AssemblyVersion("1.0.*")] | |
[assembly: AssemblyVersion("1.0.0.0")] | |
[assembly: AssemblyFileVersion("1.0.0.0")] |
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<?xml version="1.0" encoding="utf-8"?> | |
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> | |
<PropertyGroup> | |
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> | |
<Platform Condition=" '$(Platform)' == '' ">x86</Platform> | |
<ProductVersion>8.0.30703</ProductVersion> | |
<SchemaVersion>2.0</SchemaVersion> | |
<ProjectGuid>{7A46C964-2E00-4531-98C0-FD1092AF63E2}</ProjectGuid> | |
<OutputType>Exe</OutputType> | |
<AppDesignerFolder>Properties</AppDesignerFolder> | |
<RootNamespace>ConsoleApplication1</RootNamespace> | |
<AssemblyName>ExpressionVisitorFirstStep</AssemblyName> | |
<TargetFrameworkVersion>v4.0</TargetFrameworkVersion> | |
<TargetFrameworkProfile>Client</TargetFrameworkProfile> | |
<FileAlignment>512</FileAlignment> | |
</PropertyGroup> | |
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' "> | |
<PlatformTarget>x86</PlatformTarget> | |
<DebugSymbols>true</DebugSymbols> | |
<DebugType>full</DebugType> | |
<Optimize>false</Optimize> | |
<OutputPath>bin\Debug\</OutputPath> | |
<DefineConstants>DEBUG;TRACE</DefineConstants> | |
<ErrorReport>prompt</ErrorReport> | |
<WarningLevel>4</WarningLevel> | |
</PropertyGroup> | |
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' "> | |
<PlatformTarget>x86</PlatformTarget> | |
<DebugType>pdbonly</DebugType> | |
<Optimize>true</Optimize> | |
<OutputPath>bin\Release\</OutputPath> | |
<DefineConstants>TRACE</DefineConstants> | |
<ErrorReport>prompt</ErrorReport> | |
<WarningLevel>4</WarningLevel> | |
</PropertyGroup> | |
<ItemGroup> | |
<Reference Include="System" /> | |
<Reference Include="System.Core" /> | |
<Reference Include="System.Xml.Linq" /> | |
<Reference Include="System.Data.DataSetExtensions" /> | |
<Reference Include="Microsoft.CSharp" /> | |
<Reference Include="System.Data" /> | |
<Reference Include="System.Xml" /> | |
</ItemGroup> | |
<ItemGroup> | |
<Compile Include="Program.cs" /> | |
<Compile Include="Properties\AssemblyInfo.cs" /> | |
</ItemGroup> | |
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> | |
<!-- To modify your build process, add your task inside one of the targets below and uncomment it. | |
Other similar extension points exist, see Microsoft.Common.targets. | |
<Target Name="BeforeBuild"> | |
</Target> | |
<Target Name="AfterBuild"> | |
</Target> | |
--> | |
</Project> |
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| |
Microsoft Visual Studio Solution File, Format Version 11.00 | |
# Visual C# Express 2010 | |
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ExpressionVisitorFirstStep", "ExpressionVisitorFirstStep.csproj", "{7A46C964-2E00-4531-98C0-FD1092AF63E2}" | |
EndProject | |
Global | |
GlobalSection(SolutionConfigurationPlatforms) = preSolution | |
Debug|x86 = Debug|x86 | |
Release|x86 = Release|x86 | |
EndGlobalSection | |
GlobalSection(ProjectConfigurationPlatforms) = postSolution | |
{7A46C964-2E00-4531-98C0-FD1092AF63E2}.Debug|x86.ActiveCfg = Debug|x86 | |
{7A46C964-2E00-4531-98C0-FD1092AF63E2}.Debug|x86.Build.0 = Debug|x86 | |
{7A46C964-2E00-4531-98C0-FD1092AF63E2}.Release|x86.ActiveCfg = Release|x86 | |
{7A46C964-2E00-4531-98C0-FD1092AF63E2}.Release|x86.Build.0 = Release|x86 | |
EndGlobalSection | |
GlobalSection(SolutionProperties) = preSolution | |
HideSolutionNode = FALSE | |
EndGlobalSection | |
EndGlobal |
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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Text; | |
using System.Linq.Expressions; | |
namespace ConsoleApplication1 | |
{ | |
class AndAlsoModifier : ExpressionVisitor | |
{ | |
public Expression Modify(Expression expression) | |
{ | |
return Visit(expression); | |
} | |
protected override Expression VisitBinary(BinaryExpression node) | |
{ | |
if (node.NodeType == ExpressionType.AndAlso) | |
{ | |
Expression left = this.Visit(node.Left); | |
Expression right = this.Visit(node.Right); | |
return Expression.MakeBinary(ExpressionType.OrElse, left, right, node.IsLiftedToNull, node.Method); | |
} | |
return base.VisitBinary(node); | |
} | |
} | |
class Program | |
{ | |
static void Main(string[] args) | |
{ | |
Expression<Func<string, bool>> expr = name => name.Length > 10 && name.StartsWith("G"); | |
Console.WriteLine(expr); | |
var func = expr.Compile(); | |
Console.WriteLine(func("G2345678901")); // True | |
Console.WriteLine(func("G2345")); // False | |
Console.WriteLine(func("A2345678901")); // False | |
Console.WriteLine(func("A2345")); // False | |
AndAlsoModifier treeModifier = new AndAlsoModifier(); | |
Expression<Func<string, bool>> modifiedExpr = | |
treeModifier.Modify((Expression)expr) as Expression<Func<string, bool>>; | |
Console.WriteLine(modifiedExpr); | |
var modifiedFunc = modifiedExpr.Compile(); | |
Console.WriteLine(modifiedFunc("G2345678901")); // True | |
Console.WriteLine(modifiedFunc("G2345")); // True | |
Console.WriteLine(modifiedFunc("A2345678901")); // True | |
Console.WriteLine(modifiedFunc("A2345")); // False | |
} | |
} | |
} |
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