static (DmdConstructorInfo ctor, IList <DmdCustomAttributeTypedArgument> constructorArguments) GetConstructor(DmdType type, SecurityAction action)
{
var appDomain = type.AppDomain;
var securityActionType = appDomain.GetWellKnownType(DmdWellKnownType.System_Security_Permissions_SecurityAction);
var ctor = type.GetConstructor(new[] { securityActionType });
if ((object)ctor != null)
{
var ctorArgs = new[] { new DmdCustomAttributeTypedArgument(securityActionType, (int)action) };
return(ctor, ctorArgs);
}
ctor = type.GetConstructor(Array.Empty <DmdType>()) ?? type.GetConstructors().FirstOrDefault();
return(ctor, null);
}
static DmdConstructorInfo GetConstructor(DmdType proxyType, DmdType targetType)
{
if ((object)proxyType == null)
{
return(null);
}
if (proxyType.IsConstructedGenericType)
{
return(null);
}
var proxyTypeGenericArgs = proxyType.GetGenericArguments();
var targetTypeGenericArgs = targetType.GetGenericArguments();
if (proxyTypeGenericArgs.Count != targetTypeGenericArgs.Count)
{
return(null);
}
if (targetTypeGenericArgs.Count != 0)
{
proxyType = proxyType.MakeGenericType(targetTypeGenericArgs);
}
var ctors = proxyType.GetConstructors(DmdBindingFlags.Public | DmdBindingFlags.NonPublic | DmdBindingFlags.Instance);
foreach (var ctor in ctors)
{
var types = ctor.GetMethodSignature().GetParameterTypes();
if (types.Count != 1)
{
continue;
}
if (!types[0].IsAssignableFrom(targetType))
{
continue;
}
return(ctor);
}
return(null);
}