class RuboCop::Cop::Layout::SpaceInsideParens


y()
g = ( a + 3 )
f( 3 )
# good
y( )
g = (a + 3)
f(3)
# bad
# Note: Empty parentheses should not have spaces.
# beginning and end.
# The ‘space` style enforces that parentheses have a space at the
@example EnforcedStyle: space
f()
g = (a + 3)
f(3)
# good
f( )
g = (a + 3 )
f( 3)
# bad
# The `no_space` style enforces that parentheses do not have spaces.
@example EnforcedStyle: no_space (default)
Checks for spaces inside ordinary round parentheses.

def can_be_ignored?(token1, token2) 

def can_be_ignored?(token1, token2)
  return true unless parens?(token1, token2)
  # Ignore empty parentheses.
  return true if range_between(token1.begin_pos, token2.end_pos).source == '()'
  # If the second token is a comment, that means that a line break
  # follows, and that the rules for space inside don't apply.
  return true if token2.comment?
  return true unless same_line?(token1, token2) && !token1.space_after?
end

def each_extraneous_space(tokens) 

def each_extraneous_space(tokens)
  tokens.each_cons(2) do |token1, token2|
    next unless parens?(token1, token2)
    # If the second token is a comment, that means that a line break
    # follows, and that the rules for space inside don't apply.
    next if token2.comment?
    next unless same_line?(token1, token2) && token1.space_after?
    yield range_between(token1.end_pos, token2.begin_pos)
  end
end

def each_extraneous_space_in_empty_parens(token1, token2) 

def each_extraneous_space_in_empty_parens(token1, token2)
  return unless token1.left_parens? && token2.right_parens?
  return if range_between(token1.begin_pos, token2.end_pos).source == '()'
  yield range_between(token1.end_pos, token2.begin_pos)
end

def each_missing_space(token1, token2) 

def each_missing_space(token1, token2)
  return if can_be_ignored?(token1, token2)
  if token1.left_parens?
    yield range_between(token2.begin_pos, token2.begin_pos + 1)
  elsif token2.right_parens?
    yield range_between(token2.begin_pos, token2.end_pos)
  end
end

def on_new_investigation 

def on_new_investigation
  tokens = processed_source.sorted_tokens
  if style == :space
    process_with_space_style(tokens)
  else
    each_extraneous_space(tokens) do |range|
      add_offense(range) do |corrector|
        corrector.remove(range)
      end
    end
  end
end

def parens?(token1, token2) 

def parens?(token1, token2)
  token1.left_parens? || token2.right_parens?
end

def process_with_space_style(tokens) 

def process_with_space_style(tokens)
  tokens.each_cons(2) do |token1, token2|
    each_extraneous_space_in_empty_parens(token1, token2) do |range|
      add_offense(range) do |corrector|
        corrector.remove(range)
      end
    end
    each_missing_space(token1, token2) do |range|
      add_offense(range, message: MSG_SPACE) do |corrector|
        corrector.insert_before(range, ' ')
      end
    end
  end
end

def same_line?(token1, token2) 

def same_line?(token1, token2)
  token1.line == token2.line
end