protected override MethodEmitter BuildProxiedMethodBody(MethodEmitter emitter, ClassEmitter @class,
ProxyGenerationOptions options, INamingScope namingScope)
{
var invocationType = invocation;
Trace.Assert(MethodToOverride.IsGenericMethod == invocationType.IsGenericTypeDefinition);
var genericArguments = Type.EmptyTypes;
var constructor = invocation.GetConstructors()[0];
Expression proxiedMethodTokenExpression;
if (MethodToOverride.IsGenericMethod)
{
// bind generic method arguments to invocation's type arguments
genericArguments = emitter.MethodBuilder.GetGenericArguments();
invocationType = invocationType.MakeGenericType(genericArguments);
constructor = TypeBuilder.GetConstructor(invocationType, constructor);
// Not in the cache: generic method
proxiedMethodTokenExpression = new MethodTokenExpression(MethodToOverride.MakeGenericMethod(genericArguments));
}
else
{
var proxiedMethodToken = @class.CreateStaticField(namingScope.GetUniqueName("token_" + MethodToOverride.Name),
typeof(MethodInfo));
@class.ClassConstructor.CodeBuilder.AddStatement(new AssignStatement(proxiedMethodToken,
new MethodTokenExpression(MethodToOverride)));
proxiedMethodTokenExpression = proxiedMethodToken.ToExpression();
}
var dereferencedArguments = IndirectReference.WrapIfByRef(emitter.Arguments);
var arguments = GetCtorArguments(@class, namingScope, proxiedMethodTokenExpression,
dereferencedArguments);
var ctorArguments = ModifyArguments(@class, arguments);
var invocationLocal = emitter.CodeBuilder.DeclareLocal(invocationType);
emitter.CodeBuilder.AddStatement(new AssignStatement(invocationLocal,
new NewInstanceExpression(constructor, ctorArguments)));
if (MethodToOverride.ContainsGenericParameters)
{
EmitLoadGenricMethodArguments(emitter, MethodToOverride.MakeGenericMethod(genericArguments), invocationLocal);
}
var proceed = new ExpressionStatement(new MethodInvocationExpression(invocationLocal, InvocationMethods.Proceed));
emitter.CodeBuilder.AddStatement(proceed);
GeneratorUtil.CopyOutAndRefParameters(dereferencedArguments, invocationLocal, MethodToOverride, emitter);
if (MethodToOverride.ReturnType != typeof(void))
{
// Emit code to return with cast from ReturnValue
var getRetVal = new MethodInvocationExpression(invocationLocal, InvocationMethods.GetReturnValue);
emitter.CodeBuilder.AddStatement(new ReturnStatement(new ConvertExpression(emitter.ReturnType, getRetVal)));
}
else
{
emitter.CodeBuilder.AddStatement(new ReturnStatement());
}
return emitter;
}
protected override MethodEmitter BuildProxiedMethodBody(MethodEmitter emitter, ClassEmitter @class,
ProxyGenerationOptions options, INamingScope namingScope)
{
var invocationType = invocation;
Trace.Assert(MethodToOverride.IsGenericMethod == invocationType.IsGenericTypeDefinition());
var genericArguments = TypeExtender.EmptyTypes;
var constructor = invocation.GetConstructors()[0];
Expression proxiedMethodTokenExpression;
if (MethodToOverride.IsGenericMethod)
{
// bind generic method arguments to invocation's type arguments
genericArguments = emitter.MethodBuilder.GetGenericArguments();
invocationType = invocationType.MakeGenericType(genericArguments);
constructor = TypeBuilder.GetConstructor(invocationType, constructor);
// Not in the cache: generic method
proxiedMethodTokenExpression = new MethodTokenExpression(MethodToOverride.MakeGenericMethod(genericArguments));
}
else
{
var proxiedMethodToken = @class.CreateStaticField(namingScope.GetUniqueName("token_" + MethodToOverride.Name),
typeof(MethodInfo));
@class.ClassConstructor.CodeBuilder.AddStatement(new AssignStatement(proxiedMethodToken,
new MethodTokenExpression(MethodToOverride)));
proxiedMethodTokenExpression = proxiedMethodToken.ToExpression();
}
var dereferencedArguments = IndirectReference.WrapIfByRef(emitter.Arguments);
var hasByRefArguments = HasByRefArguments(emitter.Arguments);
var arguments = GetCtorArguments(@class, namingScope, proxiedMethodTokenExpression,
dereferencedArguments);
var ctorArguments = ModifyArguments(@class, arguments);
var invocationLocal = emitter.CodeBuilder.DeclareLocal(invocationType);
emitter.CodeBuilder.AddStatement(new AssignStatement(invocationLocal,
new NewInstanceExpression(constructor, ctorArguments)));
if (MethodToOverride.ContainsGenericParameters)
{
EmitLoadGenricMethodArguments(emitter, MethodToOverride.MakeGenericMethod(genericArguments), invocationLocal);
}
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new TryStatement());
}
var proceed = new ExpressionStatement(new MethodInvocationExpression(invocationLocal, InvocationMethods.Proceed));
emitter.CodeBuilder.AddStatement(proceed);
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new FinallyStatement());
}
GeneratorUtil.CopyOutAndRefParameters(dereferencedArguments, invocationLocal, MethodToOverride, emitter);
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new EndExceptionBlockStatement());
}
if (MethodToOverride.ReturnType != typeof(void))
{
// Emit code to return with cast from ReturnValue
// @mbrit - 2012-05-31 - see the note associated with the GetReturnValueForWinRt declaration
// for more information on this...
var useWinRtGenericHandler = false;
#if NETFX_CORE
if (emitter.ReturnType == typeof(int) || emitter.ReturnType == typeof(bool))
useWinRtGenericHandler = true;
#endif
if(!(useWinRtGenericHandler))
{
var getRetVal = new MethodInvocationExpression(invocationLocal, InvocationMethods.GetReturnValue);
emitter.CodeBuilder.AddStatement(new ReturnStatement(new ConvertExpression(emitter.ReturnType, getRetVal)));
}
else
{
#if NETFX_CORE
var grvArgs = new Type[] { emitter.ReturnType };
var grvCall = InvocationMethods.GetReturnValueForWinRt.MakeGenericMethod(grvArgs);
var getRetVal = new MethodInvocationExpression(invocationLocal, grvCall);
emitter.CodeBuilder.AddStatement(new ReturnStatement(getRetVal));
#endif
}
}
else
{
emitter.CodeBuilder.AddStatement(new ReturnStatement());
}
return emitter;
}
