ruby-core

Issue #13815 has been updated by opti (Andreas Opti).

Subject changed from p changes scope of *vars to p args
Status changed from Rejected to Open
ruby -v changed from 2.4 and 2.5 to 2.5.x

>If you want the same behavior, you need to use parentheses:
>3.times { p((x,y = x+1,y+1)) }

# ok, but also with ((...)) [most people] would assume its meaning is (x,  y=x+1,  y+1)...

*Other example:
p(x+=1,x+=1)  # ok
p (x+=1,x+=1)  # error
p ((x,y)=[x+1,y+1])  # ok
p((x,y)=[x+1,y+1])   # ERROR! --- normally there should be NO space before (....)

So the parsing of p(Args) might be improved...


----------------------------------------
Bug #13815: p args
https://bugs.ruby-lang.org/issues/13815#change-66206

* Author: opti (Andreas Opti)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.5.x
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
x=y=0  # outside defined vars!
3.times {|i| x,y=x+1,y+1 }  # as expected: x==3
3.times {|i| p(x,y=x+1,y+1) }  # NOT as expected: x not changed!
  # x,y are the same vars as above. p shoudn't have any effect on scope






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