Avoid warnings on lazy load

[bayashi]

Generaly, CHECK phase executes on last of compiling module. But I want to use this module as lazy-loaded. So a procs of CHECK should be able to being called from outside. And I've got rid of warnings 'Too late to run CHECK block'.

If we would have a way to avoid warnings from outside, we don't need no warnings in it. I think that it'd be better to have warnings.

[coveralls]

Pull Request Test Coverage Report for Build 42

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 98.851%

---

Totals
Change from base Build 39:	0.03%
Covered Lines:	86
Relevant Lines:	87

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 42

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 98.851%

---

Totals
Change from base Build 39:	0.03%
Covered Lines:	86
Relevant Lines:	87

---

💛 - Coveralls

[kfly8]

Thank you for the pull request!
I want to make it easier to debug if CHECK is called.

For example, I would like to do the following:

diff --git a/lib/Function/Return.pm b/lib/Function/Return.pm
index a24d453..79cbc17 100644
--- a/lib/Function/Return.pm
+++ b/lib/Function/Return.pm
@@ -170,7 +170,27 @@ sub _register_return_info {
     $metadata{$key} = $info;
 }
 
-sub CHECK {
+sub explain_check {
+    # TODO: more polite
+    my $dec = join ',', map {
+        my $sub = $_->{sub};
+        my $subname   = Sub::Util::subname($_->{sub});
+        $subname;
+    } @DECLARATIONS;
+
+    warn "Call Function::Return#CHECK. DECLARATIONS: $dec";
+}
+
+BEGIN {
+    no warnings 'void';
+
+    CHECK {
+        explain_check() if $ENV{FUNCTION_RETURN_EXPLAIN};
+        check_sub();
+    }
+}
+
+sub check_sub {
     for my $decl (@DECLARATIONS) {
         my ($pkg, $sub, $types)  = @$decl{qw(pkg sub types)};

[kfly8]

I noticed that I could use B::Hooks::EndOfScope.
Now it seems to work as expected, even in the lazy case.

I will merge this p-r and then try to fix it.

[kfly8]

Ref: #7