std.log version 2

[Jose Armando Garcia]

On Sun, Jun 5, 2011 at 11:37 AM, Mike Wey <mike-wey at example.com> wrote:
> 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?
>

At the moment no. I have a TODO for this. To allow the configuration
of the log line and the log file names. The next version will have
this!

> --
> Mike Wey
>