fix string comparisons with $] to use numeric comparison instead

The fix follows Zefram's suggestion from
https://www.nntp.perl.org/group/perl.perl5.porters/2012/05/msg186846.html

    On older perls, however, $] had a numeric value that was built up using
    floating-point arithmetic, such as 5+0.006+0.000002. This would not
    necessarily match the conversion of the complete value from string form
    [perl #72210]. You can work around that by explicitly stringifying
    $] (which produces a correct string) and having that numify (to a
    correctly-converted floating point value) for comparison. I cultivate
    the habit of always stringifying $] to work around this, regardless of
    the threshold where the bug was fixed. So I'd write

    use if "$]" >= 5.014, warnings => "non_unicode";

This ensures that the comparisons will still work when Perl's major version changes to anything greater than 9.

diff --git a/Changes b/Changes
index 99e8912..e7a9e65 100644 (file)
--- a/Changes
+++ b/Changes
@@ -1,6 +1,7 @@
 Revision history for Sub-Name
 
 {{$NEXT}}
+    - fix version comparison logic for forward compatibility
 
 0.27      2023-04-29 12:32:26Z
     - skip quote-separator tests on newer perls that deprecate this behaviour

diff --git a/t/exotic_names.t b/t/exotic_names.t
index 02887b5..c1c23cf 100644 (file)
--- a/t/exotic_names.t
+++ b/t/exotic_names.t
@@ -101,8 +101,8 @@ for my $ord (@ordinal) {
     my $expected;
   SKIP: {
     skip 'single quote as a package separator has been '.
-        ("$]" gt '5.041001' ? 'removed' : 'deprecated'), 3
-        if $ord == 39 and "$]" gt '5.037009';
+        ("$]" > 5.041001 ? 'removed' : 'deprecated'), 3
+        if $ord == 39 and "$]" > 5.037009;
 
     if ( chr($ord) =~ m/^[$legal_ident_char]$/o ) { # compile directly
         $expected = "native::$fullname";

diff --git a/t/quotes-bug.t b/t/quotes-bug.t
index 3ea3242..621ea34 100644 (file)
--- a/t/quotes-bug.t
+++ b/t/quotes-bug.t
@@ -6,9 +6,9 @@ use if $ENV{AUTHOR_TESTING}, 'Test::Warnings';
 use Sub::Name;
 
 plan skip_all => 'single quote as a package separator has been removed'
-  if "$]" gt '5.041001';
+  if "$]" > 5.041001;
 plan skip_all => 'single quote as a package separator has been deprecated'
-  if "$]" gt '5.037009';
+  if "$]" > 5.037009;
 
 my $sub = sub { (caller(0))[3] };
 subname "foo::quz'bar::baz", $sub;