Issue #7537 has been updated by zzak (Zachary Scott).

Category set to lib
Assignee set to nobu (Nobuyoshi Nakada)


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Bug #7537: OptionParser treats negative digits as options
https://bugs.ruby-lang.org/issues/7537#change-34576

Author: prijutme4ty (Ilya Vorontsov)
Status: Open
Priority: Normal
Assignee: nobu (Nobuyoshi Nakada)
Category: lib
Target version: 
ruby -v: 1.9.3(p0, p327 both)


Is it intentional that negative digits are treated as options?
If I use negative digit as an argument of an option, it is treated as a number

OptionParser.new {|opts|
  opts.on('-p','--pvalue VAL', Integer, 'P-value') {|v|  puts "P-value: #{v}" }
}.parse!

`ruby my_test.rb -p -1` works normally

But if I use it as optional argument of an option:

OptionParser.new {|opts|
  opts.on('-p','--pvalue [VAL]', Integer, 'P-value') {|v|  puts "P-value: #{v}" }
}.parse!

`ruby my_test.rb -p -1` fails with "Invalid option -1"

Also I can't use it as non-optional argument

OptionParser.new {|opts|
  opts.on('-n', 'no Pvalue argument, other arguments only') {}
}.parse!
puts ARGV

`ruby my_test.rb -1` also fails with "Invalid option -1"


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