/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Reflection;
using System.Reflection.Emit;
using Microsoft.Contracts;
using Microsoft.Scripting.Utils;
namespace Microsoft.Scripting.Generation{
public sealed class TypeGen {
private readonly AssemblyGen _myAssembly;
private readonly TypeBuilder _myType;
private ILGen _initGen; // The IL generator for the .cctor()
/// <summary>
/// Gets the Compiler associated with the Type Initializer (cctor) creating it if necessary.
/// </summary>
public ILGen TypeInitializer {
get {
if (_initGen == null) {
_initGen = new ILGen(_myType.DefineTypeInitializer().GetILGenerator());
}
return _initGen;
}
}
internal AssemblyGen AssemblyGen {
get { return _myAssembly; }
}
public TypeBuilder TypeBuilder {
get { return _myType; }
}
public TypeGen(AssemblyGen myAssembly, TypeBuilder myType) {
Assert.NotNull(myAssembly, myType);
_myAssembly = myAssembly;
_myType = myType;
}
[Confined]
public override string ToString() {
return _myType.ToString();
}
public Type FinishType() {
if (_initGen != null) _initGen.Emit(OpCodes.Ret);
Type ret = _myType.CreateType();
//Console.WriteLine("finished: " + ret.FullName);
return ret;
}
public FieldBuilder AddStaticField(Type fieldType, string name) {
return _myType.DefineField(name, fieldType, FieldAttributes.Public | FieldAttributes.Static);
}
public FieldBuilder AddStaticField(Type fieldType, FieldAttributes attributes, string name) {
return _myType.DefineField(name, fieldType, attributes | FieldAttributes.Static);
}
public ILGen DefineExplicitInterfaceImplementation(MethodInfo baseMethod) {
ContractUtils.RequiresNotNull(baseMethod, "baseMethod");
MethodAttributes attrs = baseMethod.Attributes & ~(MethodAttributes.Abstract | MethodAttributes.Public);
attrs |= MethodAttributes.NewSlot | MethodAttributes.Final;
Type[] baseSignature = baseMethod.GetParameters().Map(p => p.ParameterType);
MethodBuilder mb = _myType.DefineMethod(
baseMethod.DeclaringType.Name + "." + baseMethod.Name,
attrs,
baseMethod.ReturnType,
baseSignature);
TypeBuilder.DefineMethodOverride(mb, baseMethod);
return new ILGen(mb.GetILGenerator());
}
private const MethodAttributes MethodAttributesToEraseInOveride =
MethodAttributes.Abstract | MethodAttributes.ReservedMask;
public ILGen DefineMethodOverride(MethodInfo baseMethod) {
MethodAttributes finalAttrs = baseMethod.Attributes & ~MethodAttributesToEraseInOveride;
Type[] baseSignature = baseMethod.GetParameters().Map(p => p.ParameterType);
MethodBuilder mb = _myType.DefineMethod(baseMethod.Name, finalAttrs, baseMethod.ReturnType, baseSignature);
TypeBuilder.DefineMethodOverride(mb, baseMethod);
return new ILGen(mb.GetILGenerator());
}
}
}
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