private void WriteLogBody(ILWriter writer, Type type, MemberInfo[] loggableMembers)
{
var localTypedInstance = writer.DeclareLocal(type);
writer.LoadFirstParameter();
writer.Cast(typeof(object), type);
writer.SetLocal(localTypedInstance);
//TODO: Recurse into loggable members
foreach (var member in loggableMembers)
{
var logAttributes = member.GetCustomAttributes <LogAttribute>().ToArray();
if (logAttributes.Length == 0)
{
continue;
}
//TODO: Support multiple attributes per member
var attribute = logAttributes[0];
if (attribute.Ignore)
{
continue;
}
if (CanWriteToLog(attribute.Visibility))
{
LocalBuilder localValue;
LocalBuilder localLogItem = writer.DeclareLocal <CustomLoggableMember>();
switch (member.MemberType)
{
case MemberTypes.Field:
var field = (FieldInfo)member;
localValue = writer.DeclareLocal(field.FieldType);
writer.LoadLocal(localTypedInstance);
writer.LoadField(field);
writer.SetLocal(localValue);
break;
case MemberTypes.Property:
var property = (PropertyInfo)member;
localValue = writer.DeclareLocal(property.PropertyType);
writer.LoadLocal(localTypedInstance);
writer.GetPropertyValue(property);
writer.SetLocal(localValue);
break;
default:
var message = String.Format("Encountered loggable member '{0}' that was not supported in IL generation", member.Name);
System.Diagnostics.Debug.Fail(message);
throw new ILGenerationException(message);
}
writer.New <CustomLoggableMember>();
writer.SetLocal(localLogItem);
writer.LoadLocal(localLogItem);
writer.LoadInt32((int)attribute.Visibility);
writer.SetPropertyValue(typeof(CustomLoggableMember).GetProperty("MemberVisibility"));
writer.LoadLocal(localLogItem);
writer.TypeOf(type);
writer.Cast(localValue.LocalType, typeof(Type));
writer.SetPropertyValue(KnownMetadata.Properties.CustomLoggableMember_OwningType);
writer.LoadLocal(localLogItem);
writer.LoadString(member.Name);
writer.SetPropertyValue(KnownMetadata.Properties.CustomLoggableMember_MemberName);
writer.LoadLocal(localLogItem);
writer.TypeOf(localValue.LocalType);
writer.Cast(localValue.LocalType, typeof(Type));
writer.SetPropertyValue(KnownMetadata.Properties.CustomLoggableMember_MemberType);
writer.LoadLocal(localLogItem);
writer.LoadLocal(localValue);
writer.SetPropertyValue(KnownMetadata.Properties.CustomLoggableMember_MemberValue);
writer.LoadSecondParameter();
writer.LoadLocal(localLogItem);
writer.ActionDelegateMethodCall <CustomLoggableMember>();
}
}
writer.Return();
}