Ruby 2.7 backports

README.rdoc

@@ -75,6 +75,27 @@ Compatible with Ruby itself, JRuby and Rubinius.
 
 = Complete List of backports
 
+== Ruby 2.7 backports
+
+* Array
+  * +intersection+
+
+* Comparable
+  * +clamp+ (with range)
+
+* Complex
+  * +<=>+
+
+* Enumerable
+  * +filter_map+
+  * +tally+
+
+* Enumerator
+  * +produce+ (class method)
+
+* Time
+  * +floor+, +ceil+
+
 == Ruby 2.6 backports
 
 * Array

Rakefile

@@ -27,6 +27,7 @@ class SpecRunner
       puts "*** mspec returned with unexpected results:"
       puts result
       puts "Command was:", cmd
+      exit
     end
     _, ex, p, f, e = data = match.captures.map{|x| x.to_i}
     not_found << path if ex == 0

frozen_old_spec/rubyspec

@@ -1 +1 @@
-Subproject commit ebe6723386809bee096c2260d14e8f84bbc76eaf
+Subproject commit f8a2d541d6e441e94fd1e01ecd03e4da2a0bcd30

lib/backports/2.7.0.rb

@@ -0,0 +1,3 @@
+# require this file to load all the backports up to Ruby 2.5
+require 'backports/2.6'
+Backports.require_relative_dir

lib/backports/2.7.0/array.rb

@@ -0,0 +1,3 @@
+require 'backports/tools/require_relative_dir'
+
+Backports.require_relative_dir

lib/backports/2.7.0/array/intersection.rb

@@ -0,0 +1,5 @@
+class Array
+  def intersection(*arrays)
+    arrays.inject(Array.new(self), :&)
+  end unless method_defined? :intersection
+end

lib/backports/2.7.0/comparable.rb

@@ -0,0 +1,3 @@
+require 'backports/tools/require_relative_dir'
+
+Backports.require_relative_dir

lib/backports/2.7.0/comparable/clamp.rb

@@ -0,0 +1,22 @@
+require 'backports/2.4.0/comparable/clamp' unless Comparable.method_defined? :clamp
+
+if Comparable.instance_method(:clamp).parameters == [[:req], [:req]]
+  require 'backports/tools/alias_method_chain'
+
+  module Comparable
+    def clamp_with_range(range_or_min, max = nil)
+      return clamp_without_range(range_or_min, max) if max
+      raise TypeError, "wrong argument type #{range_or_min.class} (expected Range)" unless range_or_min.is_a?(Range)
+
+      if range_or_min.end.nil? # 2.6's endless range
+        self < range_or_min.begin ? range_or_min.begin : self
+      elsif range_or_min.exclude_end?
+        raise ArgumentError, 'cannot clamp with an exclusive range'
+      else
+        clamp_without_range(range_or_min.begin, range_or_min.end)
+      end
+    end
+
+    Backports.alias_method_chain self, :clamp, :range
+  end
+end

lib/backports/2.7.0/complex.rb

@@ -0,0 +1,3 @@
+require 'backports/tools/require_relative_dir'
+
+Backports.require_relative_dir

lib/backports/2.7.0/complex/comparision.rb

@@ -0,0 +1,13 @@
+unless Complex.method_defined?(:<=>)
+  class Complex
+    def <=>(other)
+      return nil unless imaginary.zero?
+
+      if other.is_a?(Complex)
+        other.imaginary.zero? ? real <=> other.real : nil
+      else
+        real <=> other
+      end
+    end
+  end
+end

lib/backports/2.7.0/enumerable.rb

@@ -0,0 +1,3 @@
+require 'backports/tools/require_relative_dir'
+
+Backports.require_relative_dir

lib/backports/2.7.0/enumerable/filter_map.rb

@@ -0,0 +1,12 @@
+unless Enumerable.method_defined? :filter_map
+  module Enumerable
+    def filter_map
+      return to_enum(__method__) unless block_given?
+
+      each_with_object([]) { |item, res|
+        processed = yield(item)
+        res << processed if processed
+      }
+    end
+  end
+end

lib/backports/2.7.0/enumerable/tally.rb

@@ -0,0 +1,11 @@
+unless Enumerable.method_defined? :tally
+  module Enumerable
+    def tally
+      # NB: By spec, we can't use Hash.new(0), because tally should return default-less hash
+      each_with_object({}) { |item, res|
+        res[item] ||= 0
+        res[item] += 1
+      }
+    end
+  end
+end

lib/backports/2.7.0/enumerator.rb

@@ -0,0 +1,3 @@
+require 'backports/tools/require_relative_dir'
+
+Backports.require_relative_dir

lib/backports/2.7.0/enumerator/produce.rb

@@ -0,0 +1,18 @@
+unless Enumerator.respond_to?(:produce)
+  class Enumerator
+    NOVALUE__ = Object.new.freeze
+
+    def self.produce(initial = NOVALUE__)
+      raise ArgumentError, 'no block given' unless block_given?
+
+      Enumerator.new do |y|
+        val = initial == NOVALUE__ ? yield() : initial
+
+        loop do
+          y << val
+          val = yield(val)
+        end
+      end
+    end
+  end
+end

lib/backports/2.7.0/time/ceil.rb

@@ -0,0 +1,9 @@
+unless Time.method_defined?(:ceil)
+  class Time
+    def ceil(ndigits = 0)
+      s = (sec + subsec)
+      change = s.ceil(ndigits) - s
+      self + change
+    end
+  end
+end

lib/backports/2.7.0/time/floor.rb

@@ -0,0 +1,9 @@
+unless Time.method_defined?(:floor)
+  class Time
+    def floor(ndigits = 0)
+      s = (sec + subsec)
+      change = s - s.floor(ndigits)
+      self - change
+    end
+  end
+end

lib/backports/2.7.rb

@@ -0,0 +1 @@
+require 'backports/2.7.0'

set_version/2.7.0.rb

@@ -0,0 +1 @@
+require File.expand_path(File.dirname(__FILE__) + "/setter")

spec/rubyspec

@@ -1 +1 @@
-Subproject commit 7de852d1bc559f021fefd81cac3bd3048b6e1877
+Subproject commit f8a2d541d6e441e94fd1e01ecd03e4da2a0bcd30