From 2d520eaf6f60e1bb5224b56f433fc9187b10c6cf Mon Sep 17 00:00:00 2001
From: KOBAYASHI Shuji <shuujii@gmail.com>
Date: Wed, 24 Jul 2019 20:13:26 +0900
Subject: Move `NilClass#to_h` to `mruby-object-ext` from `mruby-enum-ext`

---
 mrbgems/mruby-object-ext/src/object.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'mrbgems/mruby-object-ext/src')

diff --git a/mrbgems/mruby-object-ext/src/object.c b/mrbgems/mruby-object-ext/src/object.c
index 85db75b28..0aedc9a73 100644
--- a/mrbgems/mruby-object-ext/src/object.c
+++ b/mrbgems/mruby-object-ext/src/object.c
@@ -1,6 +1,7 @@
 #include <mruby.h>
 #include <mruby/array.h>
 #include <mruby/class.h>
+#include <mruby/hash.h>
 #include <mruby/proc.h>
 
 /*
@@ -31,6 +32,19 @@ nil_to_f(mrb_state *mrb, mrb_value obj)
 }
 #endif
 
+/*
+ *  call-seq:
+ *     nil.to_h    -> {}
+ *
+ *  Always returns an empty hash.
+ */
+
+static mrb_value
+nil_to_h(mrb_state *mrb, mrb_value obj)
+{
+  return mrb_hash_new(mrb);
+}
+
 /*
  *  call-seq:
  *     nil.to_i    -> 0
@@ -117,6 +131,7 @@ mrb_mruby_object_ext_gem_init(mrb_state* mrb)
 #ifndef MRB_WITHOUT_FLOAT
   mrb_define_method(mrb, n, "to_f", nil_to_f,       MRB_ARGS_NONE());
 #endif
+  mrb_define_method(mrb, n, "to_h", nil_to_h,       MRB_ARGS_NONE());
   mrb_define_method(mrb, n, "to_i", nil_to_i,       MRB_ARGS_NONE());
 
   mrb_define_method(mrb, mrb->kernel_module, "itself", mrb_f_itself, MRB_ARGS_NONE());
-- 
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