[PATCH 03/11] use "\&" where possible when referring to subroutines

[Eric Wong <e@80x24.org>]

"*foo" is ambiguous in that it may refer to a bareword file handle;
so we'll use it where we can without triggering warnings.

PublicInbox::TestCommon::run_script_exit required dropping the
prototype, however.  We'll also future-proof by dropping "use
warnings" in Cgit.pm and use the less-ambiguous "//=" in Inbox.pm
while we're in the area.
---
 lib/PublicInbox/Cgit.pm       | 5 ++---
 lib/PublicInbox/Inbox.pm      | 2 +-
 lib/PublicInbox/TestCommon.pm | 4 ++--
 lib/PublicInbox/WwwListing.pm | 6 +++---
 t/replace.t                   | 8 ++++----
 t/solver_git.t                | 2 +-
 xt/msgtime_cmp.t              | 2 +-
 7 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/lib/PublicInbox/Cgit.pm b/lib/PublicInbox/Cgit.pm
index 9a51b451..fb0d0e60 100644
--- a/lib/PublicInbox/Cgit.pm
+++ b/lib/PublicInbox/Cgit.pm
@@ -10,9 +10,8 @@ use strict;
 use PublicInbox::GitHTTPBackend;
 use PublicInbox::Git;
 # not bothering with Exporter for a one-off
-*input_prepare = *PublicInbox::GitHTTPBackend::input_prepare;
-*serve = *PublicInbox::GitHTTPBackend::serve;
-use warnings;
+*input_prepare = \&PublicInbox::GitHTTPBackend::input_prepare;
+*serve = \&PublicInbox::GitHTTPBackend::serve;
 use PublicInbox::Qspawn;
 use PublicInbox::WwwStatic qw(r);
 
diff --git a/lib/PublicInbox/Inbox.pm b/lib/PublicInbox/Inbox.pm
index 3b5ac970..b0894a7d 100644
--- a/lib/PublicInbox/Inbox.pm
+++ b/lib/PublicInbox/Inbox.pm
@@ -70,7 +70,7 @@ sub _cleanup_later ($) {
 	my ($self) = @_;
 	$cleanup_avail = cleanup_possible() if $cleanup_avail < 0;
 	return if $cleanup_avail != 1;
-	$cleanup_timer ||= PublicInbox::DS::later(*cleanup_task);
+	$cleanup_timer //= PublicInbox::DS::later(\&cleanup_task);
 	$CLEANUP->{"$self"} = $self;
 }
 
diff --git a/lib/PublicInbox/TestCommon.pm b/lib/PublicInbox/TestCommon.pm
index b03e93e0..42819179 100644
--- a/lib/PublicInbox/TestCommon.pm
+++ b/lib/PublicInbox/TestCommon.pm
@@ -158,7 +158,7 @@ sub _undo_redirects ($) {
 # The default is 2.
 our $run_script_exit_code;
 sub RUN_SCRIPT_EXIT () { "RUN_SCRIPT_EXIT\n" };
-sub run_script_exit (;$) {
+sub run_script_exit {
 	$run_script_exit_code = $_[0] // 0;
 	die RUN_SCRIPT_EXIT;
 }
@@ -180,7 +180,7 @@ package $pkg;
 use strict;
 use subs qw(exit);
 
-*exit = *PublicInbox::TestCommon::run_script_exit;
+*exit = \\&PublicInbox::TestCommon::run_script_exit;
 sub main {
 # the below "line" directive is a magic comment, see perlsyn(1) manpage
 # line 1 "$f"
diff --git a/lib/PublicInbox/WwwListing.pm b/lib/PublicInbox/WwwListing.pm
index 365743cf..0be3764c 100644
--- a/lib/PublicInbox/WwwListing.pm
+++ b/lib/PublicInbox/WwwListing.pm
@@ -60,9 +60,9 @@ sub list_404 ($$) { [] }
 
 # TODO: +cgit
 my %VALID = (
-	all => *list_all,
-	'match=domain' => *list_match_domain,
-	404 => *list_404,
+	all => \&list_all,
+	'match=domain' => \&list_match_domain,
+	404 => \&list_404,
 );
 
 sub set_cb ($$$) {
diff --git a/t/replace.t b/t/replace.t
index a1e2d63b..95241adf 100644
--- a/t/replace.t
+++ b/t/replace.t
@@ -179,10 +179,10 @@ EOF
 	}
 }
 
-my $opt = { pre => *pad_msgs };
+my $opt = { pre => \&pad_msgs };
 test_replace(2, 'basic', {});
 test_replace(2, 'basic', $opt);
-test_replace(2, 'basic', $opt = { %$opt, post => *pad_msgs });
+test_replace(2, 'basic', $opt = { %$opt, post => \&pad_msgs });
 test_replace(2, 'basic', $opt = { %$opt, rotate_bytes => 1 });
 
 SKIP: {
@@ -190,9 +190,9 @@ SKIP: {
 	PublicInbox::Search::load_xapian() or skip 'Search::Xapian missing', 8;
 	for my $l (qw(medium)) {
 		test_replace(2, $l, {});
-		$opt = { pre => *pad_msgs };
+		$opt = { pre => \&pad_msgs };
 		test_replace(2, $l, $opt);
-		test_replace(2, $l, $opt = { %$opt, post => *pad_msgs });
+		test_replace(2, $l, $opt = { %$opt, post => \&pad_msgs });
 		test_replace(2, $l, $opt = { %$opt, rotate_bytes => 1 });
 	}
 };
diff --git a/t/solver_git.t b/t/solver_git.t
index 78cc0edd..c162b605 100644
--- a/t/solver_git.t
+++ b/t/solver_git.t
@@ -41,7 +41,7 @@ $ibx->{-repo_objs} = [ $git ];
 my $res;
 my $solver = PublicInbox::SolverGit->new($ibx, sub { $res = $_[0] });
 open my $log, '+>>', "$inboxdir/solve.log" or die "open: $!";
-my $psgi_env = { 'psgi.errors' => *STDERR, 'psgi.url_scheme' => 'http',
+my $psgi_env = { 'psgi.errors' => \*STDERR, 'psgi.url_scheme' => 'http',
 		'HTTP_HOST' => 'example.com' };
 $solver->solve($psgi_env, $log, '69df7d5', {});
 ok($res, 'solved a blob!');
diff --git a/xt/msgtime_cmp.t b/xt/msgtime_cmp.t
index 0ce3c042..aa96be4d 100644
--- a/xt/msgtime_cmp.t
+++ b/xt/msgtime_cmp.t
@@ -62,7 +62,7 @@ my $fh = $git->popen(@cat);
 while (<$fh>) {
 	my ($oid, $type) = split / /;
 	next if $type ne 'blob';
-	$git->cat_async($oid, *compare);
+	$git->cat_async($oid, \&compare);
 }
 $git->cat_async_wait;
 ok(1);