initial implementation

1 files changed, 38 insertions, 0 deletions

diff --git a/lib/smartmatch.pm b/lib/smartmatch.pm
index e69de29..f464d95 100644
--- a/lib/smartmatch.pm
+++ b/lib/smartmatch.pm
@@ -0,0 +1,38 @@
+package smartmatch;
+use strict;
+use warnings;
+# ABSTRACT: pluggable smart matching backends
+
+use parent 'DynaLoader';
+use B::Hooks::OP::Check;
+use B::Hooks::EndOfScope;
+
+sub dl_load_flags { 0x01 }
+
+__PACKAGE__->bootstrap(
+    # we need to be careful not to touch $VERSION at compile time, otherwise
+    # DynaLoader will assume it's set and check against it, which will cause
+    # fail when being run in the checkout without dzil having set the actual
+    # $VERSION
+    exists $smartmatch::{VERSION}
+        ? ${ $smartmatch::{VERSION} } : (),
+);
+
+sub import {
+    my $package = shift;
+    my ($cb) = @_;
+    $cb = $cb->can('match') unless ref($cb);
+
+    $^H ||= 0x020000; # HINT_LOCALIZE_HH
+
+    $package->unimport;
+    $^H{'smartmatch_cb'} = smartmatch::register($cb);
+    on_scope_end { $package->unimport };
+}
+
+sub unimport {
+    return unless exists $^H{'smartmatch_cb'};
+    smartmatch::unregister(delete $^H{'smartmatch_cb'});
+}
+
+1;