Deparse require vstring without parens

require(v5.16) does not work.  I broke this by adding the parens in
917a8f4f52.

2 files changed, 25 insertions, 15 deletions

diff --git a/lib/B/Deparse.pm b/lib/B/Deparse.pm
index 9a8ad2bc95..051062328a 100644
--- a/lib/B/Deparse.pm
+++ b/lib/B/Deparse.pm
@@ -2421,23 +2421,30 @@ sub pp_require {
     my $self = shift;
     my($op, $cx) = @_;
     my $opname = $op->flags & OPf_SPECIAL ? 'CORE::require' : 'require';
-    if (class($op) eq "UNOP" and $op->first->name eq "const"
-	and $op->first->private & OPpCONST_BARE)
-    {
-	my $name = $self->const_sv($op->first)->PV;
-	$name =~ s[/][::]g;
-	$name =~ s/\.pm//g;
-	return $self->maybe_parens("$opname $name", $cx, 16);
-    } else {	
-	$self->unop(
+    my $kid = $op->first;
+    if ($kid->name eq 'const') {
+	my $priv = $kid->private;
+	my $sv = $self->const_sv($kid);
+	my $arg;
+	if ($priv & OPpCONST_BARE) {
+	    $arg = $sv->PV;
+	    $arg =~ s[/][::]g;
+	    $arg =~ s/\.pm//g;
+	} elsif ($priv & OPpCONST_NOVER) {
+	    $opname = $self->keyword('no');
+	    $arg = $self->const($sv, 16);
+	} elsif ((my $tmp = $self->const($sv, 16)) =~ /^v/) {
+	    $arg = $tmp;
+	}
+	if ($arg) {
+	    return $self->maybe_parens("$opname $arg", $cx, 16);
+	}
+    }
+    $self->unop(
 	    $op, $cx,
-	    $op->first->name eq 'const'
-	     && $op->first->private & OPpCONST_NOVER
-		 ? "no"
-		 : $opname,
+	    $opname,
 	    1, # llafr does not apply
-	);
-    }
+    );
 }
 
 sub pp_scalar {
diff --git a/lib/B/Deparse.t b/lib/B/Deparse.t
index 8d52e90cbd..5254db4db6 100644
--- a/lib/B/Deparse.t
+++ b/lib/B/Deparse.t
@@ -1568,6 +1568,9 @@ last (foo());
 next (foo());
 redo (foo());
 ####
+# require vstring
+require v5.16;
+####
 # [perl #97476] not() *does* follow the llafr
 $_ = ($a xor not +($1 || 2) ** 2);
 ####