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instance method

OptionParser#base

base

# File tmp/rubies/ruby-3.0.5/lib/optparse.rb, line 1245
def base
  @stack[1]
end

Subject of on_tail.

See also #banner #candidate #additional_message #complete also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1