class RubbyCop::Cop::Style::OneLineConditional

TODO: Make configurable. Checks for uses of if/then/else/end on a single line.

Constants

MSG

Public Instance Methods

autocorrect(node) click to toggle source
# File lib/rubbycop/cop/style/one_line_conditional.rb, line 20
def autocorrect(node)
  lambda do |corrector|
    corrector.replace(node.source_range, replacement(node))
  end
end
expr_replacement(node) click to toggle source
# File lib/rubbycop/cop/style/one_line_conditional.rb, line 46
def expr_replacement(node)
  requires_parentheses?(node) ? "(#{node.source})" : node.source
end
keyword_with_changed_precedence?(node) click to toggle source
# File lib/rubbycop/cop/style/one_line_conditional.rb, line 66
def keyword_with_changed_precedence?(node)
  return false unless node.keyword?
  return true if node.keyword_not?

  !parenthesized_call?(node)
end
method_call_with_changed_precedence?(node) click to toggle source
# File lib/rubbycop/cop/style/one_line_conditional.rb, line 58
def method_call_with_changed_precedence?(node)
  return false unless node.send_type?
  return false if node.method_args.empty?
  return false if parenthesized_call?(node)

  !operator?(node.method_name)
end
on_normal_if_unless(node) click to toggle source
# File lib/rubbycop/cop/style/one_line_conditional.rb, line 14
def on_normal_if_unless(node)
  return unless node.single_line? && node.else_branch

  add_offense(node, :expression, format(MSG, node.keyword))
end
replacement(node) click to toggle source
# File lib/rubbycop/cop/style/one_line_conditional.rb, line 26
def replacement(node)
  return to_ternary(node) unless node.parent

  if %i[and or].include?(node.parent.type)
    return "(#{to_ternary(node)})"
  end

  if node.parent.send_type? && operator?(node.parent.method_name)
    return "(#{to_ternary(node)})"
  end

  to_ternary(node)
end
requires_parentheses?(node) click to toggle source
# File lib/rubbycop/cop/style/one_line_conditional.rb, line 50
def requires_parentheses?(node)
  return true if %i[and or if].include?(node.type)
  return true if node.assignment?
  return true if method_call_with_changed_precedence?(node)

  keyword_with_changed_precedence?(node)
end
to_ternary(node) click to toggle source
# File lib/rubbycop/cop/style/one_line_conditional.rb, line 40
def to_ternary(node)
  cond, body, else_clause = *node
  "#{expr_replacement(cond)} ? #{expr_replacement(body)} : " \
    "#{expr_replacement(else_clause)}"
end