Class: RuboCop::Cop::Style::LineEndConcatenation

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

Overview

This cop checks for string literal concatenation at the end of a line.

Examples:


# bad
some_str = 'ala' +
           'bala'

some_str = 'ala' <<
           'bala'

# good
some_str = 'ala' \
           'bala'

Constant Summary collapse

MSG = 
'Use `\\` instead of `+` or `<<` to concatenate ' \
'those strings.'.freeze
CONCAT_TOKEN_TYPES = 
[:tPLUS, :tLSHFT].freeze
SIMPLE_STRING_TOKEN_TYPE = 
:tSTRING
COMPLEX_STRING_EDGE_TOKEN_TYPES = 
[:tSTRING_BEG, :tSTRING_END].freeze
HIGH_PRECEDENCE_OP_TOKEN_TYPES = 
[:tSTAR2, :tPERCENT, :tDOT,
:tLBRACK2].freeze
QUOTE_DELIMITERS = 
%w(' ").freeze

Constants included from Util

Util::ASGN_NODES, Util::BYTE_ORDER_MARK, Util::EQUALS_ASGN_NODES, Util::LITERAL_REGEX, Util::OPERATOR_METHODS, Util::SHORTHAND_ASGN_NODES

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary collapse

Methods inherited from Cop

#add_offense, all, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, cop_type, #correct, #debug?, #details, #display_cop_names?, #display_style_guide?, #duplicate_location?, #excluded_file?, #extra_details?, #find_location, #highlights, inherited, #initialize, #join_force?, lint?, match?, #message, #messages, non_rails, #parse, qualified_cop_name, #reference_url, #relevant_file?, #style_guide_url, #target_ruby_version

Methods included from 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?, block_length, comment_line?, directions, double_quotes_acceptable?, double_quotes_required?, effective_column, ends_its_line?, escape_string, first_part_of_call_chain, interpret_string_escapes, line_distance, line_range, move_pos, needs_escaping?, numeric_range_size, on_node, operator?, parentheses?, parenthesized_call?, preceed?, range_between, range_with_surrounding_comma, range_with_surrounding_space, same_line?, source_range, strip_quotes, stripped_source_upto, to_string_literal, to_symbol_literal, within_node?

Methods included from PathUtil

absolute?, match_path?, relative_path

Constructor Details

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

Instance Method Details

#autocorrect(operator_range) ⇒ Object 



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# File 'lib/rubocop/cop/style/line_end_concatenation.rb', line 39

def autocorrect(operator_range)
  # Include any trailing whitespace so we don't create a syntax error.
  operator_range = range_with_surrounding_space(operator_range,
                                                :right,
                                                !:with_newline)
  one_more_char = operator_range.resize(operator_range.size + 1)
  # Don't create a double backslash at the end of the line, in case
  # there already was a backslash after the concatenation operator.
  operator_range = one_more_char if one_more_char.source.end_with?('\\')

  ->(corrector) { corrector.replace(operator_range, '\\') }
end

#investigate(processed_source) ⇒ Object 



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# File 'lib/rubocop/cop/style/line_end_concatenation.rb', line 33

def investigate(processed_source)
  processed_source.tokens.each_index do |index|
    check_token_set(index)
  end
end