Add System.CodeDom to corefx

This ports the type model and C#/VB code generators to corefx; compilation to assemblies is currently not supported (we could potentially layer that on top of Roslyn subsequently).  I also ported a bunch of tests, though there's lots of room for improvement on the test suite.


Commit migrated from https://github.com/dotnet/corefx/commit/91bc9da917d184c5579f66b4512462d8f3064b90

src/libraries/System.CodeDom/System.CodeDom.sln

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src/libraries/System.CodeDom/dir.props

+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\dir.props" />
+  <PropertyGroup>
+    <AssemblyVersion>4.0.0.0</AssemblyVersion>
+  </PropertyGroup>
+</Project>
+

src/libraries/System.CodeDom/pkg/System.CodeDom.builds

+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <ItemGroup>
+    <Project Include="System.CodeDom.pkgproj"/>
+  </ItemGroup>
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.traversal.targets))\dir.traversal.targets" />
+</Project>

src/libraries/System.CodeDom/pkg/System.CodeDom.pkgproj

+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+
+  <ItemGroup>
+    <ProjectReference Include="..\ref\System.CodeDom.csproj">
+      <SupportedFramework>net463;netcoreapp1.1;$(AllXamarinFrameworks)</SupportedFramework>
+    </ProjectReference>
+    <ProjectReference Include="..\src\System.CodeDom.builds" />
+  </ItemGroup>
+
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
+</Project>

src/libraries/System.CodeDom/ref/System.CodeDom.csproj

+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+    <NuGetTargetMoniker>.NETStandard,Version=v1.7</NuGetTargetMoniker>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard1.7_Debug|AnyCPU'" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard1.7_Release|AnyCPU'" />
+  <ItemGroup>
+    <Compile Include="System.CodeDom.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="project.json" />
+  </ItemGroup>
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
+</Project>

src/libraries/System.CodeDom/ref/project.json

+{
+  "dependencies": {
+    "System.Collections.Specialized": "4.3.0-beta-24522-03",
+    "System.ComponentModel.TypeConverter": "4.3.0-beta-24522-03",
+    "System.Collections.NonGeneric": "4.3.0-beta-24522-03",
+    "System.Collections.Specialized": "4.3.0-beta-24522-03",
+    "System.IO": "4.3.0-beta-24522-03",
+    "System.Reflection": "4.3.0-beta-24522-03",
+    "System.Runtime": "4.3.0-beta-24522-03",
+    "System.Security.Permissions": "4.3.0-beta-24522-03",
+    "System.Text.Encoding": "4.3.0-beta-24522-03"
+  },
+  "frameworks": {
+    "netstandard1.7": {
+        "imports": [
+            "dotnet5.8"
+        ]
+    }
+  }
+}

src/libraries/System.CodeDom/src/Microsoft/CSharp/CSharpCodeProvider.cs

+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.IO;
+using System.ComponentModel;
+using System.Reflection;
+using System.CodeDom;
+using System.CodeDom.Compiler;
+using System.Collections.Generic;
+
+namespace Microsoft.CSharp
+{
+    public class CSharpCodeProvider : CodeDomProvider
+    {
+        private readonly CSharpCodeGenerator _generator;
+
+        public CSharpCodeProvider()
+        {
+            _generator = new CSharpCodeGenerator();
+        }
+
+        public CSharpCodeProvider(IDictionary<string, string> providerOptions)
+        {
+            if (providerOptions == null)
+            {
+                throw new ArgumentNullException(nameof(providerOptions));
+            }
+
+            _generator = new CSharpCodeGenerator(providerOptions);
+        }
+
+        public override string FileExtension => "cs";
+
+        [Obsolete("Callers should not use the ICodeGenerator interface and should instead use the methods directly on the CodeDomProvider class.")]
+        public override ICodeGenerator CreateGenerator() => _generator;
+
+        [Obsolete("Callers should not use the ICodeCompiler interface and should instead use the methods directly on the CodeDomProvider class.")]
+        public override ICodeCompiler CreateCompiler() => _generator;
+
+        public override TypeConverter GetConverter(Type type) =>
+            type == typeof(MemberAttributes) ? CSharpMemberAttributeConverter.Default :
+            type == typeof(TypeAttributes) ? CSharpTypeAttributeConverter.Default :
+            base.GetConverter(type);
+
+        public override void GenerateCodeFromMember(CodeTypeMember member, TextWriter writer, CodeGeneratorOptions options) =>
+            _generator.GenerateCodeFromMember(member, writer, options);
+    }
+}

src/libraries/System.CodeDom/src/Microsoft/CSharp/CSharpMemberAttributeConverter.cs

+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.CodeDom;
+
+namespace Microsoft.CSharp
+{
+    internal class CSharpMemberAttributeConverter : CSharpModifierAttributeConverter
+    {
+        private CSharpMemberAttributeConverter() { } // no  need to create an instance; use Default
+
+        public static CSharpMemberAttributeConverter Default { get; } = new CSharpMemberAttributeConverter();
+
+        protected override string[] Names { get; } = new[] { "Public", "Protected", "Protected Internal", "Internal", "Private" };
+
+        protected override object[] Values { get; } =
+            new object[] { MemberAttributes.Public, MemberAttributes.Family, MemberAttributes.FamilyOrAssembly, MemberAttributes.Assembly, MemberAttributes.Private };
+
+        protected override object DefaultValue => MemberAttributes.Private;
+    }
+}

src/libraries/System.CodeDom/src/Microsoft/CSharp/CSharpModifierAttributeConverter.cs

+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Microsoft.CSharp
+{
+    internal abstract class CSharpModifierAttributeConverter : TypeConverter
+    {
+        protected abstract object[] Values { get; }
+        protected abstract string[] Names { get; }
+        protected abstract object DefaultValue { get; }
+
+        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) =>
+            sourceType == typeof(string) ? true : base.CanConvertFrom(context, sourceType);
+
+        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
+        {
+            string name = value as string;
+            if (name != null)
+            {
+                string[] names = Names;
+                for (int i = 0; i < names.Length; i++)
+                {
+                    if (names[i].Equals(name))
+                    {
+                        return Values[i];
+                    }
+                }
+            }
+
+            return DefaultValue;
+        }
+
+        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
+        {
+            if (destinationType == null)
+            {
+                throw new ArgumentNullException(nameof(destinationType));
+            }
+
+            if (destinationType == typeof(string))
+            {
+                object[] modifiers = Values;
+                for (int i = 0; i < modifiers.Length; i++)
+                {
+                    if (modifiers[i].Equals(value))
+                    {
+                        return Names[i];
+                    }
+                }
+
+                return SR.toStringUnknown;
+            }
+
+            return base.ConvertTo(context, culture, value, destinationType);
+        }
+
+        public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) => true;
+
+        public override bool GetStandardValuesSupported(ITypeDescriptorContext context) => true;
+
+        public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) => new StandardValuesCollection(Values);
+    }
+}

src/libraries/System.CodeDom/src/Microsoft/CSharp/CSharpTypeAttributeConverter.cs

+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Reflection;
+
+namespace Microsoft.CSharp
+{
+    internal class CSharpTypeAttributeConverter : CSharpModifierAttributeConverter
+    {
+        private CSharpTypeAttributeConverter() { } // no  need to create an instance; use Default
+
+        public static CSharpTypeAttributeConverter Default { get; } = new CSharpTypeAttributeConverter();
+
+        protected override string[] Names { get; } = new[] { "Public", "Internal" };
+
+        protected override object[] Values { get; } = new object[] { TypeAttributes.Public, TypeAttributes.NotPublic };
+
+        protected override object DefaultValue => TypeAttributes.NotPublic;
+    }
+}

src/libraries/System.CodeDom/src/Microsoft/VisualBasic/VBCodeProvider.cs

+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.IO;
+using System.ComponentModel;
+using System.Reflection;
+using System.CodeDom;
+using System.CodeDom.Compiler;
+using System.Collections.Generic;
+
+namespace Microsoft.VisualBasic
+{
+    public class VBCodeProvider : CodeDomProvider
+    {
+        private VBCodeGenerator _generator;
+
+        public VBCodeProvider()
+        {
+            _generator = new VBCodeGenerator();
+        }
+
+        public VBCodeProvider(IDictionary<string, string> providerOptions)
+        {
+            if (providerOptions == null)
+            {
+                throw new ArgumentNullException(nameof(providerOptions));
+            }
+
+            _generator = new VBCodeGenerator(providerOptions);
+        }
+
+        public override string FileExtension => "vb";
+
+        public override LanguageOptions LanguageOptions => LanguageOptions.CaseInsensitive;
+
+        [Obsolete("Callers should not use the ICodeGenerator interface and should instead use the methods directly on the CodeDomProvider class.")]
+        public override ICodeGenerator CreateGenerator() => _generator;
+
+        [Obsolete("Callers should not use the ICodeCompiler interface and should instead use the methods directly on the CodeDomProvider class.")]
+        public override ICodeCompiler CreateCompiler() => _generator;
+
+        public override TypeConverter GetConverter(Type type) =>
+            type == typeof(MemberAttributes) ? VBMemberAttributeConverter.Default :
+            type == typeof(TypeAttributes) ? VBTypeAttributeConverter.Default :
+            base.GetConverter(type);
+
+        public override void GenerateCodeFromMember(CodeTypeMember member, TextWriter writer, CodeGeneratorOptions options) =>
+            _generator.GenerateCodeFromMember(member, writer, options);
+    }
+}