log(str) is not work

[dlangBugzillaToGithub]

1499874170 reported this on 2023-04-15T15:55:55Z

Transfered from https://issues.dlang.org/show_bug.cgi?id=23840

Description

For std/logger/package.d
The comments tell me:

The easiest way to create a log message is to write:
-------------
import std.logger;

void main() {
    log("Hello World");
}
-------------

But I created a test project:
(test.d)
import std.logger;
void main(string[] args)
{
    log("test");
}

It is not any output.

But if I change it:
(test.d)
import std.logger;
void main(string[] args)
{
    log(LogLevel.info, "test");
}

It is working.

[Inkrementator]

While the top example in the docs now recommends using info("test") instead of log("test") since #10582, this is still at the very least documented badly, if not implemented incorrectly.

The docs mention several times that without providing a loglevel, that it will use the default log level of the logger

log("Logging to the sharedLog with its default LogLevel");

what is the the default log level of the logger? It should be the value of logger.logLevel, right? But then calling log without providing a LogLevel should by definition always use the minimum acceptable loglevel.

Should the bug be made a feature and documented or should the behaviour be fixed in a "breaking" change? I'd consider the current useability bad enough and the severity of additional log entries mild enough to say it should just be made that log("test") should dispatch a message per default

[0xEAB]

what is the the default log level of the logger? It should be the value of logger.logLevel, right?

That part is actually documented:

phobos/std/logger/package.d

Lines 61 to 62 in b3aee4d

	The default `Logger` will by default log to `stderr` and has a default
	`LogLevel` of `LogLevel.info`. The default Logger can be accessed by

But then calling log without providing a LogLevel should by definition always use the minimum acceptable loglevel.

I like this idea, but I’m not sure whether the crowd agrees.

See also: https://issues.dlang.org/show_bug.cgi?id=22532