Class: RuboCop::Cop::Performance::LstripRstrip

Inherits:
Cop
  • Object
show all
Defined in:
lib/rubocop/cop/performance/lstrip_rstrip.rb

Overview

This cop identifies places where ‘lstrip.rstrip` can be replaced by `strip`.

Examples:

@bad
'abc'.lstrip.rstrip
'abc'.rstrip.lstrip

@good
'abc'.strip

Constant Summary collapse

MSG = 
'Use `strip` instead of `%s.%s`.'.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, Util::STRING_ESCAPES, Util::STRING_ESCAPE_REGEX

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?, #excluded_file?, #extra_details?, inherited, #initialize, #join_force?, lint?, match?, #message, 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_body

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?, first_part_of_call_chain, interpret_string_escapes, line_range, move_pos, numeric_range_size, on_node, operator?, parentheses?, range_with_surrounding_comma, range_with_surrounding_space, source_range, strip_quotes, to_string_literal, to_symbol_literal, within_node?

Methods included from PathUtil

absolute?, hidden?, issue_deprecation_warning, match_path?, relative_path

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/performance/lstrip_rstrip.rb', line 34

def autocorrect(node)
  first_send, = *node
  range = Parser::Source::Range.new(node.source_range.source_buffer,
                                    first_send.loc.selector.begin_pos,
                                    node.source_range.end_pos)
  ->(corrector) { corrector.replace(range, 'strip') }
end

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/performance/lstrip_rstrip.rb', line 25

def on_send(node)
  lstrip_rstrip(node) do |first_send, method_one, method_two|
    range = Parser::Source::Range.new(node.source_range.source_buffer,
                                      first_send.loc.selector.begin_pos,
                                      node.source_range.end_pos)
    add_offense(node, range, format(MSG, method_one, method_two))
  end
end