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()`

2 files changed, 15 insertions, 16 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
 
diff --git a/mrbgems/mruby-rational/src/rational.c b/mrbgems/mruby-rational/src/rational.c
index fcaba3df5..5b1bec9e2 100644
--- a/mrbgems/mruby-rational/src/rational.c
+++ b/mrbgems/mruby-rational/src/rational.c
@@ -102,11 +102,11 @@ rational_s_new(mrb_state *mrb, mrb_value self)
   mrb_value numv, denomv;
 
   mrb_get_args(mrb, "oo", &numv, &denomv);
-  if (mrb_fixnum_p(numv)) {
-    numerator = mrb_fixnum(numv);
+  if (mrb_integer_p(numv)) {
+    numerator = mrb_integer(numv);
 
-    if (mrb_fixnum_p(denomv)) {
-      denominator = mrb_fixnum(denomv);
+    if (mrb_integer_p(denomv)) {
+      denominator = mrb_integer(denomv);
     }
     else {
       mrb_float denomf = mrb_to_flo(mrb, denomv);
@@ -118,8 +118,8 @@ rational_s_new(mrb_state *mrb, mrb_value self)
   else {
     mrb_float numf = mrb_to_flo(mrb, numv);
 
-    if (mrb_fixnum_p(denomv)) {
-      denominator = mrb_fixnum(denomv);
+    if (mrb_integer_p(denomv)) {
+      denominator = mrb_integer(denomv);
     }
     else {
       mrb_float denomf = mrb_to_flo(mrb, denomv);
@@ -176,7 +176,7 @@ rational_negative_p(mrb_state *mrb, mrb_value self)
 static mrb_value
 fix_to_r(mrb_state *mrb, mrb_value self)
 {
-  return rational_new(mrb, mrb_fixnum(self), 1);
+  return rational_new(mrb, mrb_integer(self), 1);
 }
 
 void mrb_mruby_rational_gem_init(mrb_state *mrb)