Reorganize `Integer` system.

- Integrate `Fixnum` and `Integer`
- Remove `Integral`
- `int / int -> int`
- Replace `mrb_fixnum()` to `mrb_int()`
- Replace `mrb_fixnum_value()` to `mrb_int_value()`.
- Use `mrb_integer_p()` instead of `mrb_fixnum_p()`

1 files changed, 8 insertions, 9 deletions

diff --git a/mrbgems/mruby-rational/mrblib/rational.rb b/mrbgems/mruby-rational/mrblib/rational.rb
index 489d89ebd..e401b1bd6 100644
--- a/mrbgems/mruby-rational/mrblib/rational.rb
+++ b/mrbgems/mruby-rational/mrblib/rational.rb
@@ -48,11 +48,11 @@ class Rational < Numeric
   end
 
   def <=>(rhs)
-    if rhs.is_a?(Integral)
+    case rhs
+    when Integer, Float
       return numerator <=> rhs if denominator == 1
       rhs = Rational(rhs)
     end
-
     case rhs
     when Rational
       (numerator * rhs.denominator - denominator * rhs.numerator) <=> 0
@@ -65,14 +65,13 @@ class Rational < Numeric
 
   def ==(rhs)
     return true if self.equal?(rhs)
-    if rhs.is_a?(Integral) && denominator == 1
-      return numerator == rhs
-    end
-    if rhs.is_a?(Rational)
-      numerator * rhs.denominator == denominator * rhs.numerator
-    else
-      rhs == self
+    case rhs
+    when Integer, Float
+      return numerator == rhs if denominator == 1
+    when Rational
+      return numerator * rhs.denominator == denominator * rhs.numerator
     end
+    rhs == self
   end
 end