use Devel::Hints where possible

this will avoid breaking memoization when generating coderefs with
descriptions, and should be more robust and useful

1 files changed, 15 insertions, 3 deletions

diff --git a/lib/Eval/Closure.pm b/lib/Eval/Closure.pm
index b03df5b..ee93a7a 100644
--- a/lib/Eval/Closure.pm
+++ b/lib/Eval/Closure.pm
@@ -8,11 +8,14 @@ use Sub::Exporter -setup => {
 # ABSTRACT: safely and cleanly create closures via string eval
 
 use Carp;
+use Devel::Hints qw(cop_file cop_line);
 use overload ();
 use Memoize;
 use Scalar::Util qw(reftype);
 use Try::Tiny;
 
+use constant USE_DEVEL_HINTS => ($] >= 5.010);
+
 =head1 SYNOPSIS
 
   use Eval::Closure;
@@ -93,14 +96,23 @@ sub eval_closure {
     $args{source} = _canonicalize_source($args{source});
     _validate_env($args{environment} ||= {});
 
-    $args{source} = _line_directive($args{description}) . $args{source}
-        if defined $args{description};
+    if (!USE_DEVEL_HINTS) {
+        $args{source} = _line_directive($args{description}) . $args{source}
+            if defined $args{description};
+    }
 
     my ($code, $e) = _clean_eval_closure(@args{qw(source environment)});
 
     croak("Failed to compile source: $e\n\nsource:\n$args{source}")
         unless $code;
 
+    if (USE_DEVEL_HINTS) {
+        if (defined $args{description}) {
+            cop_file($code, $args{description});
+            cop_line($code, 1);
+        }
+    }
+
     return $code;
 }
 
@@ -147,7 +159,7 @@ sub _validate_env {
 sub _line_directive {
     my ($description) = @_;
 
-    return qq{#line 1 "$description"\n};
+    return qq{#line 0 "$description"\n};
 }
 
 sub _clean_eval_closure {