charliesome	2013-06-05 20:32:07 +0900 (Wed, 05 Jun 2013)

  New Revision: 41087

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=41087

  Log:
    add parentheses for clarity

  Modified files:
    trunk/include/ruby/ruby.h

Index: include/ruby/ruby.h
===================================================================
--- include/ruby/ruby.h	(revision 41086)
+++ include/ruby/ruby.h	(revision 41087)
@@ -345,7 +345,7 @@ rb_long2int_inline(long n) https://github.com/ruby/ruby/blob/trunk/include/ruby/ruby.h#L345
 
 #define IMMEDIATE_P(x) ((VALUE)(x) & IMMEDIATE_MASK)
 
-#define SYMBOL_P(x) (((VALUE)(x)&~(~(VALUE)0<<RUBY_SPECIAL_SHIFT))==SYMBOL_FLAG)
+#define SYMBOL_P(x) (((VALUE)(x)&~((~(VALUE)0)<<RUBY_SPECIAL_SHIFT))==SYMBOL_FLAG)
 #define ID2SYM(x) (((VALUE)(x)<<RUBY_SPECIAL_SHIFT)|SYMBOL_FLAG)
 #define SYM2ID(x) RSHIFT((unsigned long)(x),RUBY_SPECIAL_SHIFT)
 

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