nobu	2016-11-29 19:47:43 +0900 (Tue, 29 Nov 2016)

  New Revision: 56927

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=56927

  Log:
    parse.y: ambiguous parentheses
    
    * parse.y (parser_yylex): warn ambiguous parentheses after a space
      in method definitions.

  Modified files:
    trunk/ext/date/lib/date.rb
    trunk/ext/openssl/lib/openssl/buffering.rb
    trunk/parse.y
Index: parse.y
===================================================================
--- parse.y	(revision 56926)
+++ parse.y	(revision 56927)
@@ -8520,6 +8520,10 @@ parser_yylex(struct parser_params *parse https://github.com/ruby/ruby/blob/trunk/parse.y#L8520
 	else if (IS_SPCARG(-1)) {
 	    c = tLPAREN_ARG;
 	}
+	else if (IS_lex_state(EXPR_ENDFN) && space_seen) {
+	    rb_warning0("parentheses after method name is interpreted as");
+	    rb_warning0("an argument list, not a decomposed argument");
+	}
 	paren_nest++;
 	COND_PUSH(0);
 	CMDARG_PUSH(0);
Index: ext/date/lib/date.rb
===================================================================
--- ext/date/lib/date.rb	(revision 56926)
+++ ext/date/lib/date.rb	(revision 56927)
@@ -15,17 +15,17 @@ class Date https://github.com/ruby/ruby/blob/trunk/ext/date/lib/date.rb#L15
 
     protected :d
 
-    def zero? () false end
-    def finite? () false end
-    def infinite? () d.nonzero? end
-    def nan? () d.zero? end
+    def zero?() false end
+    def finite?() false end
+    def infinite?() d.nonzero? end
+    def nan?() d.zero? end
 
     def abs() self.class.new end
 
-    def -@ () self.class.new(-d) end
-    def +@ () self.class.new(+d) end
+    def -@() self.class.new(-d) end
+    def +@() self.class.new(+d) end
 
-    def <=> (other)
+    def <=>(other)
       case other
       when Infinity; return d <=> other.d
       when Numeric; return d
Index: ext/openssl/lib/openssl/buffering.rb
===================================================================
--- ext/openssl/lib/openssl/buffering.rb	(revision 56926)
+++ ext/openssl/lib/openssl/buffering.rb	(revision 56927)
@@ -381,7 +381,7 @@ module OpenSSL::Buffering https://github.com/ruby/ruby/blob/trunk/ext/openssl/lib/openssl/buffering.rb#L381
   # Writes +s+ to the stream.  +s+ will be converted to a String using
   # String#to_s.
 
-  def << (s)
+  def <<(s)
     do_write(s)
     self
   end

--
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