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* parse.y (primary): allow an empty grouped expression as the

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operand of the not operator (e.g., not ()).
  [ruby-core:45976] [Bug #6674]

* parse.y (parser_yylex): show no warning for a grouped expression
  as the operand of the not operator (e.g., not (a)) or as an
  argument of a method call without parentheses (e.g., foo (a)).
  [ruby-core:39050] [Bug #5214]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36434 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
shugo 2012-07-18 07:05:12 +00:00
parent e9a91d2c95
commit bbaf9b2800
3 changed files with 31 additions and 1 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
Wed Jul 18 15:50:25 2012 Shugo Maeda <shugo@ruby-lang.org>
* parse.y (primary): allow an empty grouped expression as the
operand of the not operator (e.g., not ()).
[ruby-core:45976] [Bug #6674]
* parse.y (parser_yylex): show no warning for a grouped expression
as the operand of the not operator (e.g., not (a)) or as an
argument of a method call without parentheses (e.g., foo (a)).
[ruby-core:39050] [Bug #5214]
Wed Jul 18 15:33:21 2012 Koichi Sasada <ko1@atdot.net>
* thread.c (rb_thread_call_without_gvl2): added.

9
parse.y
View file

@ -2710,6 +2710,14 @@ primary : literal
$$ = dispatch1(begin, $3);
%*/
}
| tLPAREN_ARG {lex_state = EXPR_ENDARG;} rparen
{
/*%%%*/
$$ = 0;
/*%
$$ = dispatch1(paren, 0);
%*/
}
| tLPAREN_ARG expr {lex_state = EXPR_ENDARG;} rparen
{
/*%%%*/
@ -7671,7 +7679,6 @@ parser_yylex(struct parser_params *parser)
}
else if (IS_SPCARG(-1)) {
c = tLPAREN_ARG;
rb_warning0("(...) interpreted as grouped expression");
}
paren_nest++;
COND_PUSH(0);

12
test/ruby/test_not.rb Normal file
View file

@ -0,0 +1,12 @@
require 'test/unit'
class TestIfunless < Test::Unit::TestCase
def test_not_with_grouped_expression
assert_equal(false, (not (true)))
assert_equal(true, (not (false)))
end
def test_not_with_empty_grouped_expression
assert_equal(true, (not ()))
end
end