[GR-20117] Implemented Comparable#clamp.

PullRequest: truffleruby/1192

Author: Nicolas Laurent

CHANGELOG.md

@@ -55,6 +55,7 @@ Compatibility:
 * Joni has been updated from 2.1.25 to 2.1.30.
 * Implemented `Method#<<` and `Method#>>` (#1821).
 * The `.bundle` file extension is now used for C extensions on macOS (#1819, #1837).
+* Implemented `Comparable#clamp` (#1517).
 
 Performance:
 

spec/tags/core/comparable/clamp_tags.txt

@@ -79,6 +79,14 @@ def between?(min, max)
     true
   end
 
+  def clamp(min, max)
+    comp = min <=> max
+    raise ArgumentError, 'min argument must be smaller than max argument' if comp == nil or comp > 0
+    return min if self < min
+    return max if self > max
+    self
+  end
+
   # A version of MRI's rb_cmpint (sort of)
   def self.compare_int(int)
     return int if int.kind_of? Integer

src/main/ruby/truffleruby/core/comparable.rb

@@ -36,8 +36,9 @@
 
 class Complex < Numeric
 
-  undef_method :%, :<, :<=, :<=>, :>, :>=, :between?, :div, :divmod, :floor, :ceil, :modulo,
-               :remainder, :round, :step, :truncate, :i, :negative?, :positive?
+  undef_method :%, :<, :<=, :<=>, :>, :>=, :between?, :clamp, # comparable
+               :div, :divmod, :floor, :ceil, :modulo, :remainder,
+               :round, :step, :truncate, :i, :negative?, :positive?
 
   def self.convert(real, imag = undefined)
     if nil.equal?(real) || nil.equal?(imag)