Implement raiph's our-scalar suggestion

This moves the actual Log role to Log::Abstract, but the user-facing
interface remains the same due to some EXPORT magic. This little bit of
magic makes manual inclusion of Log::Level redundant as well.

The suggestion itself concerns a new addition to the module,
$Log::instance. This is a "shared" variable in that one part of your
program can set it, and others parts can use it wherever. This is
potentially favourable over using $*LOG, especially in multi-threaded
programs.

3 files changed, 68 insertions, 25 deletions

diff --git a/META6.json b/META6.json
index 4a84d53..836f696 100644
--- a/META6.json
+++ b/META6.json
@@ -10,8 +10,9 @@
   "perl": "6.d",
   "provides": {
     "Log": "lib/Log.rakumod",
+    "Log::Abstract": "lib/Log/Abstract.rakumod",
     "Log::Level": "lib/Log/Level.rakumod"
   },
   "source-url": "https://home.tyil.nl/git/raku/Log/",
   "version": "0.1.1"
-}
\ No newline at end of file
+}
diff --git a/lib/Log.rakumod b/lib/Log.rakumod
index 542a732..c818217 100644
--- a/lib/Log.rakumod
+++ b/lib/Log.rakumod
@@ -2,32 +2,18 @@
 
 use v6.d;
 
+use Log::Abstract;
 use Log::Level;
 
-unit role Log;
-
-# Methods for handling plain string messages.
-multi method emergency (Str:D $) { * }
-multi method alert (Str:D $) { * }
-multi method critical (Str:D $) { * }
-multi method error (Str:D $) { * }
-multi method warning (Str:D $) { * }
-multi method notice (Str:D $) { * }
-multi method info (Str:D $) { * }
-multi method debug (Str:D $) { * }
-
-# Methods for handling formatted messages.
-multi method emergency (Str:D $, *@) { * }
-multi method alert (Str:D $, *@) { * }
-multi method critical (Str:D $, *@) { * }
-multi method error (Str:D $, *@) { * }
-multi method warning (Str:D $, *@) { * }
-multi method notice (Str:D $, *@) { * }
-multi method info (Str:D $, *@) { * }
-multi method debug (Str:D $, *@) { * }
-
-# Method for configuration
-multi method add-output (IO::Handle:D $, Int() $ where Log::Level::Emergency ≤ * ≤ Log::Level::Debug, Callable $?) { * }
+sub EXPORT
+{
+	%(
+		'Log' => Log::Abstract,
+		'Log::Level' => Log::Level,
+	)
+}
+
+our $instance;
 
 =begin pod
 
diff --git a/lib/Log/Abstract.rakumod b/lib/Log/Abstract.rakumod
new file mode 100644
index 0000000..645c13a
--- /dev/null
+++ b/lib/Log/Abstract.rakumod
@@ -0,0 +1,56 @@
+#! /usr/bin/env false
+
+use v6.d;
+
+use Log::Level;
+
+unit role Log::Abstract;
+
+# Methods for handling plain string messages.
+multi method emergency (Str:D $) { * }
+multi method alert (Str:D $) { * }
+multi method critical (Str:D $) { * }
+multi method error (Str:D $) { * }
+multi method warning (Str:D $) { * }
+multi method notice (Str:D $) { * }
+multi method info (Str:D $) { * }
+multi method debug (Str:D $) { * }
+
+# Methods for handling formatted messages.
+multi method emergency (Str:D $, *@) { * }
+multi method alert (Str:D $, *@) { * }
+multi method critical (Str:D $, *@) { * }
+multi method error (Str:D $, *@) { * }
+multi method warning (Str:D $, *@) { * }
+multi method notice (Str:D $, *@) { * }
+multi method info (Str:D $, *@) { * }
+multi method debug (Str:D $, *@) { * }
+
+# Method for configuration
+multi method add-output (IO::Handle:D $, Int() $ where Log::Level::Emergency ≤ * ≤ Log::Level::Debug, Callable $?) { * }
+
+=begin pod
+
+=NAME    Log::Abstract
+=VERSION 0.1.1
+=AUTHOR  Patrick Spek <p.spek@tyil.nl>
+
+=begin LICENSE
+Copyright © 2020
+
+This program is free software: you can redistribute it and/or modify it under
+the terms of the GNU Lesser General Public License as published by the Free
+Software Foundation, version 3.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program.  If not, see http://www.gnu.org/licenses/.
+=end LICENSE
+
+=end pod
+
+# vim: ft=raku noet sw=8 ts=8