Class: Rubocop::Cop::Style::LambdaCall

Inherits:
Cop
  • Object
show all
Includes:
ConfigurableEnforcedStyle
Defined in:
lib/rubocop/cop/style/lambda_call.rb

Overview

This cop checks for use of the lambda.(args) syntax.

Examples:


# bad
lambda.(x, y)

# good
lambda.call(x, y)

Constant Summary

Constants inherited from Cop

Cop::OPERATOR_METHODS

Constants included from Util

Util::PROC_NEW_NODE

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offences, #processed_source

Instance Method Summary collapse

Methods included from ConfigurableEnforcedStyle

#alternative_style, #both_styles_detected, #correct_style_detected, #opposite_style_detected, #style, #unrecognized_style_detected

Methods inherited from Cop

#add_offence, all, #autocorrect?, #config_to_allow_offences, #config_to_allow_offences=, #cop_config, cop_name, #cop_name, cop_type, #debug?, #exclude_file?, #exclude_paths, #ignore_node, #include_file?, #include_paths, inherited, #initialize, lint?, non_rails, rails?, #relevant_file?, style?, #support_autocorrect?

Methods included from Util

block_length, command?, comment_line?, const_name, first_part_of_call_chain, lambda?, lambda_or_proc?, line_range, on_node, proc?, range_with_surrounding_space, source_range, strip_quotes

Constructor Details

This class inherits a constructor from Rubocop::Cop::Cop

Instance Method Details

#autocorrect(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/lambda_call.rb', line 32

def autocorrect(node)
  @corrections << lambda do |corrector|
    if style == :call
      receiver_node, = *node
      expr = node.loc.expression
      receiver = receiver_node.loc.expression.source
      replacement = expr.source.sub("#{receiver}.", "#{receiver}.call")
      corrector.replace(expr, replacement)
    else
      corrector.remove(node.loc.selector)
    end
  end
end

#message(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/lambda_call.rb', line 46

def message(node)
  if style == :call
    'Prefer the use of `lambda.call(...)` over `lambda.(...)`.'
  else
    'Prefer the use of `lambda.(...)` over `lambda.call(...)`.'
  end
end

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/lambda_call.rb', line 18

def on_send(node)
  _receiver, selector, = *node

  # we care only about `call` methods
  return unless selector == :call

  if style == :call && node.loc.selector.nil?
    # lambda.() does not have a selector
    add_offence(node, :expression)
  elsif style == :braces && node.loc.selector
    add_offence(node, :expression)
  end
end