* parse.y (primary): make functional-style not operator to act

  like function.  see <http://d.hatena.ne.jp/ku-ma-me/20080624/p1>.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@17573 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/parse.y b/parse.y
index 022d947414..2d82b7b61c 100644
--- a/parse.y
+++ b/parse.y
@@ -2613,6 +2613,14 @@ primary		: literal
 			$$ = dispatch1(defined, $5);
 		    %*/
 		    }
+		| keyword_not '(' expr rparen
+		    {
+		    /*%%%*/
+			$$ = call_uni_op(cond($3), '!');
+		    /*%
+			$$ = dispatch2(unary, ripper_intern("not"), $3);
+		    %*/
+		    }
 		| operation brace_block
 		    {
 		    /*%%%*/