Formatter examples (Dateish.pod)

gistfile1.txt

=head2 method formatter

Defined as:

    method formatter(Dateish:D:)

Usage:

    Dateish.formatter

Returns the formatting function which is used for conversion to
L<Str|/type/Str>. If none was provided at object construction, a
default formatter is used.  In that case the method will return a
Callable type object.

The formatting function is called by L<#method Str> with the invocant as its
only argument.

+    my $dt = Date.new('2015-12-31');  # (no formatter specified)
+    say $dt.formatter.WHAT;           # (Callable)
+    my $us-format = sub ($self) { sprintf "%2d/%02d/%04d", .month, .day, .year given $self; };
+    $dt = Date.new('2015-12-31', formatter => $us-format);
+    say $dt.formatter.WHAT;           # (Sub)
+    say $dt;                          # 12/31/2015