1 files changed, 32 insertions, 0 deletions
diff --git a/mrblib/numeric.rb b/mrblib/numeric.rb
index 1d701b1fc..daa35c5d6 100644
--- a/mrblib/numeric.rb
+++ b/mrblib/numeric.rb
@@ -5,6 +5,14 @@
 class Integer
 
   ##
+  # Returns the receiver simply.
+  #
+  # ISO 15.2.8.3.14
+  def ceil
+    self
+  end
+
+  ##
   # Calls the given block once for each Integer
   # from +self+ downto +num+.
   #
@@ -19,6 +27,14 @@ class Integer
   end
 
   ##
+  # Returns the receiver simply.
+  #
+  # ISO 15.2.8.3.17
+  def floor
+    self
+  end
+
+  ##
   # Calls the given block +self+ times.
   #
   # ISO 15.2.8.3.22
@@ -32,6 +48,22 @@ class Integer
   end
 
   ##
+  # Returns the receiver simply.
+  #
+  # ISO 15.2.8.3.24
+  def round
+    self
+  end
+
+  ##
+  # Returns the receiver simply.
+  #
+  # ISO 15.2.8.3.26
+  def truncate
+    self
+  end
+
+  ##
   # Calls the given block once for each Integer
   # from +self+ upto +num+.
   #