From f3ec5f744f5c59ecf0c7b1a761c7f3be266deb01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?fn=20=E2=8C=83=20=E2=8C=A5?=
 <70830482+FnControlOption@users.noreply.github.com>
Date: Mon, 24 Oct 2022 09:30:27 -0700
Subject: [PATCH 1/3] rational.c: implement `nil.to_r` and `Float#to_r`

---
 mrbgems/mruby-rational/src/rational.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/mrbgems/mruby-rational/src/rational.c b/mrbgems/mruby-rational/src/rational.c
index 164ae9f2f..40b27aa20 100644
--- a/mrbgems/mruby-rational/src/rational.c
+++ b/mrbgems/mruby-rational/src/rational.c
@@ -347,12 +347,26 @@ rational_negative_p(mrb_state *mrb, mrb_value self)
   return mrb_false_value();
 }
 
+#ifndef MRB_NO_FLOAT
+static mrb_value
+float_to_r(mrb_state *mrb, mrb_value self)
+{
+  return rational_new_f(mrb, mrb_float(self));
+}
+#endif
+
 static mrb_value
 fix_to_r(mrb_state *mrb, mrb_value self)
 {
   return rational_new(mrb, mrb_integer(self), 1);
 }
 
+static mrb_value
+nil_to_r(mrb_state *mrb, mrb_value self)
+{
+  return rational_new(mrb, 0, 1);
+}
+
 static mrb_value
 rational_m(mrb_state *mrb, mrb_value self)
 {
@@ -776,7 +790,11 @@ void mrb_mruby_rational_gem_init(mrb_state *mrb)
   mrb_define_method(mrb, rat, "quo", rational_div, MRB_ARGS_REQ(1));
   mrb_define_method(mrb, rat, "**", rational_pow, MRB_ARGS_REQ(1));
   mrb_define_method(mrb, rat, "hash", rational_hash, MRB_ARGS_NONE());
+#ifndef MRB_NO_FLOAT
+  mrb_define_method(mrb, mrb->float_class, "to_r", float_to_r, MRB_ARGS_NONE());
+#endif
   mrb_define_method(mrb, mrb->integer_class, "to_r", fix_to_r, MRB_ARGS_NONE());
+  mrb_define_method(mrb, mrb->nil_class, "to_r", nil_to_r, MRB_ARGS_NONE());
   mrb_define_method(mrb, mrb->kernel_module, "Rational", rational_m, MRB_ARGS_ARG(1,1));
 }
 

From 78017417905e2ba81dbf2a70e4ef3590707fab11 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?fn=20=E2=8C=83=20=E2=8C=A5?=
 <70830482+FnControlOption@users.noreply.github.com>
Date: Mon, 24 Oct 2022 09:30:41 -0700
Subject: [PATCH 2/3] complex.c: implement `nil.to_c`

---
 mrbgems/mruby-complex/src/complex.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/mrbgems/mruby-complex/src/complex.c b/mrbgems/mruby-complex/src/complex.c
index 63b28af3f..ad88a67ec 100644
--- a/mrbgems/mruby-complex/src/complex.c
+++ b/mrbgems/mruby-complex/src/complex.c
@@ -381,6 +381,12 @@ complex_hash(mrb_state *mrb, mrb_value cpx)
   return mrb_int_value(mrb, hash);
 }
 
+static mrb_value
+nil_to_c(mrb_state *mrb, mrb_value self)
+{
+  return complex_new(mrb, 0, 0);
+}
+
 void mrb_mruby_complex_gem_init(mrb_state *mrb)
 {
   struct RClass *comp;
@@ -404,6 +410,7 @@ void mrb_mruby_complex_gem_init(mrb_state *mrb)
   mrb_define_method(mrb, comp, "quo", complex_div, MRB_ARGS_REQ(1));
   mrb_define_method(mrb, comp, "==", complex_eq, MRB_ARGS_REQ(1));
   mrb_define_method(mrb, comp, "hash", complex_hash, MRB_ARGS_NONE());
+  mrb_define_method(mrb, mrb->nil_class, "to_c", nil_to_c, MRB_ARGS_NONE());
 }
 
 void

From c65200cb5a8540f1cb654929ec91e3bf56a3f121 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?fn=20=E2=8C=83=20=E2=8C=A5?=
 <70830482+FnControlOption@users.noreply.github.com>
Date: Mon, 24 Oct 2022 09:31:47 -0700
Subject: [PATCH 3/3] complex.rb: implement `Numeric#to_c`

---
 mrbgems/mruby-complex/mrblib/complex.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mrbgems/mruby-complex/mrblib/complex.rb b/mrbgems/mruby-complex/mrblib/complex.rb
index 4c36179cb..e341efc5d 100644
--- a/mrbgems/mruby-complex/mrblib/complex.rb
+++ b/mrbgems/mruby-complex/mrblib/complex.rb
@@ -74,3 +74,9 @@ class Complex < Numeric
   end
   undef i
 end
+
+class Numeric
+  def to_c
+    Complex(self, 0)
+  end
+end