2 files changed, 29 insertions, 0 deletions
diff --git a/ext/-test-/arith_seq/extract/extconf.rb b/ext/-test-/arith_seq/extract/extconf.rb
new file mode 100644
index 0000000000..9c368bf50e
--- /dev/null
+++ b/ext/-test-/arith_seq/extract/extconf.rb
@@ -0,0 +1,2 @@
+# frozen_string_literal: false
+create_makefile("-test-/arith_seq/extract")
diff --git a/ext/-test-/arith_seq/extract/extract.c b/ext/-test-/arith_seq/extract/extract.c
new file mode 100644
index 0000000000..602afa7ca1
--- /dev/null
+++ b/ext/-test-/arith_seq/extract/extract.c
@@ -0,0 +1,27 @@
+#include "ruby/ruby.h"
+
+static VALUE
+arith_seq_s_extract(VALUE mod, VALUE obj)
+{
+  rb_arithmetic_sequence_components_t x;
+  VALUE ret;
+  int f, r;
+
+  r = rb_arithmetic_sequence_extract(obj, &x);
+
+  ret = rb_ary_new2(5);
+  rb_ary_store(ret, 0, r ? x.begin : Qnil);
+  rb_ary_store(ret, 1, r ? x.end   : Qnil);
+  rb_ary_store(ret, 2, r ? x.step  : Qnil);
+  rb_ary_store(ret, 3, r ? INT2FIX(x.exclude_end) : Qnil);
+  rb_ary_store(ret, 4, INT2FIX(r));
+
+  return ret;
+}
+
+void
+Init_extract(void)
+{
+    VALUE cArithSeq = rb_path2class("Enumerator::ArithmeticSequence");
+    rb_define_singleton_method(cArithSeq, "__extract__", arith_seq_s_extract, 1);
+}