Alias Set#to_s to #inspect [ruby-core:81753] [Feature #13676]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59332 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 16 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index aae7b9637f..af11da3550 100644
--- a/NEWS
+++ b/NEWS
@@ -110,6 +110,9 @@ with all sufficient information, see the ChangeLog file or Redmine
   * Carriage returns are changed to be trimmed properly if trim_mode is specified
     and used. Duplicated newlines will be removed on Windows. [Bug #5339] [Bug #11464]
 
+* Set
+  * Add Set#to_s as alias to #inspect [Feature #13676]
+
 * WEBrick
 
   * Add Server Name Indication (SNI) support [Feature #13729]
diff --git a/lib/set.rb b/lib/set.rb
index 43c388ca90..bfa37d4dc0 100644
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -569,6 +569,8 @@ class Set
     end
   end
 
+  alias to_s inspect
+
   def pretty_print(pp)  # :nodoc:
     pp.text sprintf('#<%s: {', self.class.name)
     pp.nest(1) {
diff --git a/test/test_set.rb b/test/test_set.rb
index 5774af741e..aaf3bfe3b8 100644
--- a/test/test_set.rb
+++ b/test/test_set.rb
@@ -715,6 +715,17 @@ class TC_Set < Test::Unit::TestCase
     assert_equal('#<Set: {#<Set: {0}>, 1, 2, #<Set: {1, 2, #<Set: {...}>}>}>', set2.inspect)
   end
 
+  def test_to_s
+    set1 = Set[1, 2]
+    assert_equal('#<Set: {1, 2}>', set1.to_s)
+
+    set2 = Set[Set[0], 1, 2, set1]
+    assert_equal('#<Set: {#<Set: {0}>, 1, 2, #<Set: {1, 2}>}>', set2.to_s)
+
+    set1.add(set2)
+    assert_equal('#<Set: {#<Set: {0}>, 1, 2, #<Set: {1, 2, #<Set: {...}>}>}>', set2.to_s)
+  end
+
   def test_compare_by_identity
     a1, a2 = "a", "a"
     b1, b2 = "b", "b"