jruby could warn more
---------------------
Key: JRUBY-5536
URL: http://jira.codehaus.org/browse/JRUBY-5536
Project: JRuby
Issue Type: Improvement
Environment: jruby 1.6.0.RC2 (ruby 1.8.7 patchlevel 330) (2011-02-22
698a5e3) (Java HotSpot(TM) Client VM 1.6.0_18) [Windows 7-x86-java]
Reporter: Roger Pack
Assignee: Thomas E Enebo
With this code,
{noformat}
#old_das = File.read('children.xml').scan(/dgs:(\d{9})/).map &:first
unaccounted = old_das -das
{noformat}
jruby -v outputs "syntax_warnings.rb:2 warning: Ambiguous first argument; make
sure." (MRI's warning is a bit different: "syntax_warnings.rb:2: warning:
ambiguous first argument; put parentheses or even spaces" which may be clearer).
And with this code:
{noformat}
old_das = File.read('children.xml').scan(/dgs:(\d{9})/).map( &:first)
unaccounted = old_das -das
{noformat}
MRI outputs:
C:\dev\2.4\preservation\prestapedb>ruby -vc syntax_warnings.rb
ruby 1.9.2p136 (2010-12-25) [i386-mingw32]
syntax_warnings.rb:2: warning: `-' after local variable is interpreted as
binary operator
syntax_warnings.rb:2: warning: even though it seems like unary operator
Syntax OK
and jruby outputs no warnings at all, which may not have been expected.
Cheers!
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