Class: RuboCop::Cop::Layout::SpaceInLambdaLiteral

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

Overview

This cop checks for spaces between -> and opening parameter brace in lambda literals.

Examples:

EnforcedStyle: require_no_space (default)

# bad
a = -> (x, y) { x + y }

# good
a = ->(x, y) { x + y }

EnforcedStyle: require_space

# bad
a = ->(x, y) { x + y }

# good
a = -> (x, y) { x + y }

Constant Summary collapse

ARROW = 
'->'.freeze
MSG_REQUIRE_SPACE = 
'Use a space between `->` and opening brace ' \
'in lambda literals'.freeze
MSG_REQUIRE_NO_SPACE = 
'Do not use spaces between `->` and opening ' \
'brace in lambda literals'.freeze

Constants included from Util

Util::ASGN_NODES, Util::BYTE_ORDER_MARK, Util::CONDITIONAL_NODES, Util::EQUALS_ASGN_NODES, Util::LITERAL_REGEX, Util::LOGICAL_OPERATOR_NODES, Util::MODIFIER_NODES, Util::OPERATOR_METHODS, Util::SHORTHAND_ASGN_NODES

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary collapse

Methods included from ConfigurableEnforcedStyle

#alternative_style, #alternative_styles, #ambiguous_style_detected, #correct_style_detected, #detected_style, #detected_style=, #no_acceptable_style!, #no_acceptable_style?, #opposite_style_detected, #style, #style_detected, #style_parameter_name, #supported_styles, #unexpected_style_detected

Methods inherited from Cop

#add_offense, all, autocorrect_incompatible_with, badge, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, #correct, department, #duplicate_location?, #excluded_file?, #find_location, #highlights, inherited, #initialize, #join_force?, lint?, match?, #message, #messages, non_rails, #parse, qualified_cop_name, #relevant_file?, #target_rails_version, #target_ruby_version

Methods included from AST::Sexp

#s

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search, #node_search, #node_search_all, #node_search_body, #node_search_first

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #support_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

begins_its_line?, comment_line?, double_quotes_required?, effective_column, ends_its_line?, escape_string, first_part_of_call_chain, interpret_string_escapes, line_range, needs_escaping?, on_node, operator?, parentheses?, parenthesized_call?, precede?, range_between, range_by_whole_lines, range_with_surrounding_comma, range_with_surrounding_space, same_line?, source_range, strip_quotes, stripped_source_upto, symbol_without_quote?, to_string_literal, to_supported_styles, to_symbol_literal, within_node?

Methods included from PathUtil

absolute?, find_file_upwards, match_path?, pwd, relative_path, reset_pwd, smart_path

Constructor Details

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

Instance Method Details

#autocorrect(lambda_node) ⇒ Object 



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# File 'lib/rubocop/cop/layout/space_in_lambda_literal.rb', line 44

def autocorrect(lambda_node)
  children = lambda_node.parent.children
  lambda do |corrector|
    if style == :require_space
      corrector.insert_before(children[1].source_range, ' ')
    else
      space_range = range_between(children[0].source_range.end_pos,
                                  children[1].source_range.begin_pos)
      corrector.remove(space_range)
    end
  end
end

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/layout/space_in_lambda_literal.rb', line 31

def on_send(node)
  return unless arrow_lambda_with_args?(node)
  if style == :require_space && !space_after_arrow?(node)
    add_offense(node,
                location: node.parent.loc.expression,
                message: MSG_REQUIRE_SPACE)
  elsif style == :require_no_space && space_after_arrow?(node)
    add_offense(node,
                location: node.parent.loc.expression,
                message: MSG_REQUIRE_NO_SPACE)
  end
end