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Some cases of assignment in conditional do not warn as in MRI #3757

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headius opened this issue Mar 24, 2016 · 1 comment
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Some cases of assignment in conditional do not warn as in MRI #3757

headius opened this issue Mar 24, 2016 · 1 comment
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parser
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JRuby 9.1.0.0

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@headius
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headius commented Mar 24, 2016

Environment

JRuby 9.1 (HEAD)

Expected Behavior

We should display the same warnings for "assignment in conditional" as in MRI.

Actual Behavior

The following cases differ, which prevents MRI's TestRubyOptions#test_assignment_in_conditional from passing. These are the only remaining issues for that test to be green.

Here's output comparing JRuby and MRI:

[] ~/projects/jruby $ jruby -Xbacktrace.style=mri -e "if a = [a]; end"
-e:1: warning: found = in conditional, should be ==

[] ~/projects/jruby $ jruby -Xbacktrace.style=mri -e "if a = {1=>2}; end"

[] ~/projects/jruby $ jruby -Xbacktrace.style=mri -e "if a = {}; end"

[] ~/projects/jruby $ ruby23 -e "if a = [a]; end"

[] ~/projects/jruby $ ruby23 -e "if a = {1=>2}; end"
-e:1: warning: found = in conditional, should be ==

[] ~/projects/jruby $ ruby23 -e "if a = {}; end"
-e:1: warning: found = in conditional, should be ==
@headius headius added the parser label Mar 24, 2016
headius added a commit that referenced this issue Mar 24, 2016
@headius
Fix a couple exception messages.
f43d140 
The "assignment" warning fix almost gets MRI's TestRubyoptions#
test_assignment_in_conditional, but there's a few cases where we
differ from MRI in warning output. See #3757.
@enebo enebo closed this as completed in 1a829a7 Apr 1, 2016
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enebo commented Apr 1, 2016

This involved two fixes:

  1. HashNode was not marked as a ILiteralNode
  2. The warning only triggers if Arrays/Hashes do not contain anything but other literal nodes.

@enebo enebo added this to the JRuby 9.1.0.0 milestone Apr 1, 2016
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