On Tuesday, 22 July 2014 at 21:52:09 UTC, linkrope wrote:
Sorry, but at the first contact with the implementation (the
one with 'genDocComment' and 'buildLogFunction' from months
ago) I was scared away. (It's better now.)
There was no need, even read that, for implementing a
FileRotateLogger
I feared that if I criticize the 'mixin' sequences you would
ask something like "suggestions?" ;-)
So, I made this experiment to provide an answer. Now, I can
suggest: try something like this:
alias trace = log!(LogLevel.trace);
alias info = log!(LogLevel.info);
alias warn = log!(LogLevel.warn);
alias error = log!(LogLevel.error);
alias fatal = log!(LogLevel.fatal);
(see https://github.com/linkrope/log/blob/master/src/log.d)
I did and I had to mod it quite a bit to make it work with
default logging instance logging and an more elaborate api
Controversial conditional logging
----------------------------
The only advantage of
tracec(condition, "passed");
over
if (condition) trace("passed");
would be, that a costly evaluation of the condition is omitted
when there is no trace logger.
That's why the std.log proposal had 'when(lazy bool now)'.
First, I was puzzled about your argument that LOG_FIRST_N or
LOG_EVERY_N would be no problem with the '...c' functions. But
a look at the implementation confirmed that the std.logger has
no lazy evaluation of the condition; discarding the only
advantage.
passing a bool as a delegate that is the first thing that gets
evaluated does not sound right.
Sets of log levels
--------------
No!
Of course, I can log (trace | info) to stdout, warn.orHigher to
stderr, and for instance info.orHigher to some file.
Simplicity
--------
"The simplest way to achieve simplicity is through thoughtful
reduction."
We started with tango.util.log (best described as log4j for D).
We are happier now with a lot less functionality, but on the
other hand with the simplest API that works.
In your last post you said that you wrote it on a weekend, which
is it?
That api may work for your requirements, but this should go into
phobos and allow anybody to get satisfied.
