std.log version 2

Mike Wey mike-wey at example.com
Sun Jun 5 07:37:41 PDT 2011


On 06/04/2011 07:04 PM, Jose Armando Garcia wrote:
> Hi everyone,
>
> I went back and incorporated a lot of the community requested changes.
> The module has changed quite a bit. Some notable changes are:
>
> * Got rid of all the *Config struct. You can now configure some parts
> of std.log even after logging as started. See Configuration
> * Got rid of the initLogging methods/templates they are not need
> anymore. The module should work without initialization.
> * Added the log severity critical which throws when logged.
> * Gave in and made LogFilter a final class
> * Fixed compile time disabling by using a template to get the
> LogFilter. The new syntax is log!info.
> * Added rich boolean support! More on that below.
>
> code: https://github.com/jsancio/phobos/blob/master/std/log.d
> doc: http://jsancio.github.com/phobos/phobos/std_log.html
>
> Note: I had to make changes to std.datetime (was getting a segfault;
> changes are in my repo) and druntime (patch attached).
>
> Now on to rich boolean. I wanted to be able to print in the log
> message why the when() expression is true. To achieve this I added a
> struct Rich(Type)
> which encapsulate the value and the reason for that value. Right now
> the implementation is not every smart and just stores the reason as a
> string.
>
> For example if you write:
>
> log!info.format("You passed %s argument(s)", args.length - 1);
> log!info.when(richGreater(args.length, 1))("Arguments: ", args[1 .. $]);
> log!info.when(richOr(richIsNull(obj), richEqual(10, 20)))("Something strange");
>
> you get the following log lines:
>
> 20110604T152711.0138317Z:93d780 src/justo/main.d:11 INFO You passed 4
> argument(s)
> 20110604T152711.0142393Z:93d780 src/justo/main.d:12 INFO when(true =
> (a>  b)<a = '5', b = '1'>) Arguments: [--minloglevel=info,
> --logtostderr, --stderrThreshold=info, --v=0]
> 20110604T152711.0150535Z:93d780 src/justo/main.d:14 INFO when(true =
> (a || b)<a = 'true = (a is null)<a = 'null'>', b = 'false = (a == b)
> <a = '10', b = '20'>'>) Something strange!
>
> I am interested to hear people's option of this. How can it be improved?
>
> Many thanks,
> -Jose

It it possible to get a more Human readable date and time, i didn't see 
any options for it in the docs?

-- 
Mike Wey


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