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Bug #4561

closed

1.9.2 requires parentheses around argument of method call in an array, where 1.8.7 did not

Added by dschweisguth (Dave Schweisguth) about 11 years ago. Updated almost 11 years ago.

Status:
Closed
Priority:
Normal
Target version:
ruby -v:
-
Backport:
[ruby-core:35637]

Description

[dave hladik:~] cat method_call_without_parens_in_array.rb
def method_name(arg)
end

[ method_name 'value' ]
[dave hladik:~] ruby -v
ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin10]
[dave hladik:~] ruby method_call_without_parens_in_array.rb
[dave hladik:~] rvm 1.9.2
[dave hladik:~] ruby -v
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.7.0]
[dave hladik:~] ruby method_call_without_parens_in_array.rb
method_call_without_parens_in_array.rb:4: syntax error, unexpected tSTRING_BEG, expecting keyword_do or '{' or '('
[ method_name 'value' ]
^
method_call_without_parens_in_array.rb:4: syntax error, unexpected ']', expecting $end
[dave hladik:~] rvm system
[dave hladik:~] ruby -v
ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin10]
[dave hladik:~] cat method_call_with_parens_in_array.rb
def method_name(arg)
end

[ method_name('value') ]
[dave hladik:~] ruby -v
ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin10]
[dave hladik:~] ruby method_call_with_parens_in_array.rb
[dave hladik:~] rvm 1.9.2
[dave hladik:~] ruby -v
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.7.0]
[dave hladik:~] ruby method_call_with_parens_in_array.rb

no error


Files

method_call_without_parens_in_array.rb (50 Bytes) method_call_without_parens_in_array.rb dschweisguth (Dave Schweisguth), 04/07/2011 01:41 PM
method_call_with_parens_in_array.rb (51 Bytes) method_call_with_parens_in_array.rb dschweisguth (Dave Schweisguth), 04/07/2011 01:41 PM

Updated by dschweisguth (Dave Schweisguth) about 11 years ago

=begin
Same thing with pre formatting:

[dave hladik:~] cat method_call_without_parens_in_array.rb
def method_name(arg)
end

[ method_name 'value' ]
[dave hladik:~] rvm system
[dave hladik:~] ruby -v
ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin10]
[dave hladik:~] ruby method_call_without_parens_in_array.rb
[dave hladik:~] rvm 1.9.2
[dave hladik:~] ruby -v
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.7.0]
[dave hladik:~] ruby method_call_without_parens_in_array.rb
method_call_without_parens_in_array.rb:4: syntax error, unexpected tSTRING_BEG, expecting keyword_do or '{' or '('
[ method_name 'value' ]
^
method_call_without_parens_in_array.rb:4: syntax error, unexpected ']', expecting $end
[dave hladik:~] cat method_call_with_parens_in_array.rb
def method_name(arg)
end

[ method_name('value') ]
[dave hladik:~] rvm system
[dave hladik:~] ruby -v
ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin10]
[dave hladik:~] ruby method_call_with_parens_in_array.rb
[dave hladik:~] rvm 1.9.2
[dave hladik:~] ruby method_call_with_parens_in_array.rb

no error

=end

Updated by naruse (Yui NARUSE) about 11 years ago

  • Status changed from Open to Assigned
  • Assignee set to matz (Yukihiro Matsumoto)

=begin

=end

Updated by Eregon (Benoit Daloze) about 11 years ago

=begin
That has bitten me a few times too, but I accepted it as it is probably clearer in a long expression.

I'm curious to see why this changed.
=end

Updated by ko1 (Koichi Sasada) almost 11 years ago

Matz, could you reply?

Updated by matz (Yukihiro Matsumoto) almost 11 years ago

  • ruby -v changed from ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.7.0] to -

Hi,

In message "Re: [ruby-core:36994] [Ruby 1.9 - Bug #4561] 1.9.2 requires parentheses around argument of method call in an array, where 1.8.7 did not"
on Sat, 11 Jun 2011 15:58:33 +0900, Koichi Sasada writes:

|Bug #4561: 1.9.2 requires parentheses around argument of method call in an array, where 1.8.7 did not
|http://redmine.ruby-lang.org/issues/4561
|
|Matz, could you reply?

It's an intentional syntax change in 1.9.

						matz.
Actions #6

Updated by jlnr (Julian Raschke) almost 11 years ago

Yukihiro Matsumoto wrote:

It's an intentional syntax change in 1.9.

I have run into the same issue today and wasn't sure if it was a bug or intentional. Nice to find both this issue and your recent response.

Out of curiosity, what is the reasoning behind this change? It seems a bit unintuitive that foo(bar 5) and {bar 5} work, even [bar { baz }], but [bar 5] not. All four are enclosed calls without parenthesis. Is there an ambiguity nearby that this syntax change is trying to clarify?

Updated by nahi (Hiroshi Nakamura) almost 11 years ago

  • Assignee changed from matz (Yukihiro Matsumoto) to ko1 (Koichi Sasada)
  • Target version set to 1.9.3

Updated by ko1 (Koichi Sasada) almost 11 years ago

  • Status changed from Assigned to Closed
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