parse.y: magic comment w/o indicators

* parse.y (parser_magic_comment): allow a sole magic comment without
  indicators, neither other non-space comments.  [Feature #8976]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52208 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 26 insertions, 2 deletions

diff --git a/test/ruby/test_literal.rb b/test/ruby/test_literal.rb
index 0d65ebac2c..e523f11cd7 100644
--- a/test/ruby/test_literal.rb
+++ b/test/ruby/test_literal.rb
@@ -123,14 +123,38 @@ class TestRubyLiteral < Test::Unit::TestCase
 
   def test_frozen_string
     all_assertions do |a|
-      a.for("false") do
+      a.for("false with indicator") do
         str = eval("# -*- frozen-string-literal: false -*-\n""'foo'")
         assert_not_predicate(str, :frozen?)
       end
-      a.for("true") do
+      a.for("true with indicator") do
         str = eval("# -*- frozen-string-literal: true -*-\n""'foo'")
         assert_predicate(str, :frozen?)
       end
+      a.for("false without indicator") do
+        str = eval("# frozen-string-literal: false\n""'foo'")
+        assert_not_predicate(str, :frozen?)
+      end
+      a.for("true without indicator") do
+        str = eval("# frozen-string-literal: true\n""'foo'")
+        assert_predicate(str, :frozen?)
+      end
+      a.for("false with preceding garbage") do
+        str = eval("# x frozen-string-literal: false\n""'foo'")
+        assert_not_predicate(str, :frozen?)
+      end
+      a.for("true with preceding garbage") do
+        str = eval("# x frozen-string-literal: true\n""'foo'")
+        assert_not_predicate(str, :frozen?)
+      end
+      a.for("false with succeeding garbage") do
+        str = eval("# frozen-string-literal: false x\n""'foo'")
+        assert_not_predicate(str, :frozen?)
+      end
+      a.for("true with succeeding garbage") do
+        str = eval("# frozen-string-literal: true x\n""'foo'")
+        assert_not_predicate(str, :frozen?)
+      end
     end
   end