Class: RuboCop::Cop::Lint::RedundantSplatExpansion

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector
Defined in:
lib/rubocop/cop/lint/redundant_splat_expansion.rb

Overview

This cop checks for unneeded usages of splat expansion

Examples:


# bad

a = *[1, 2, 3]
a = *'a'
a = *1

begin
  foo
rescue *[StandardError, ApplicationError]
  bar
end

case foo
when *[1, 2, 3]
  bar
else
  baz
end

# good

c = [1, 2, 3]
a = *c
a, b = *c
a, *b = *c
a = *1..10
a = ['a']

begin
  foo
rescue StandardError, ApplicationError
  bar
end

case foo
when 1, 2, 3
  bar
else
  baz
end

Constant Summary collapse

MSG =
'Replace splat expansion with comma separated values.'
ARRAY_PARAM_MSG =
'Pass array contents as separate arguments.'
PERCENT_W =
'%w'
PERCENT_CAPITAL_W =
'%W'
PERCENT_I =
'%i'
PERCENT_CAPITAL_I =
'%I'
ASSIGNMENT_TYPES =
%i[lvasgn ivasgn cvasgn gvasgn].freeze

Constants inherited from Base

Base::RESTRICT_ON_SEND

Constants included from Util

Util::LITERAL_REGEX

Instance Attribute Summary

Attributes inherited from Base

#config, #processed_source

Instance Method Summary collapse

Methods included from AutoCorrector

support_autocorrect?

Methods inherited from Base

#add_global_offense, #add_offense, autocorrect_incompatible_with, badge, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, #cop_name, cop_name, department, documentation_url, exclude_from_registry, #excluded_file?, #external_dependency_checksum, inherited, #initialize, joining_forces, lint?, match?, #message, #offenses, #on_investigation_end, #on_new_investigation, #on_other_file, #ready, #relevant_file?, support_autocorrect?, support_multiple_source?, #target_rails_version, #target_ruby_version

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #correctable?, #disable_uncorrectable?, #safe_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

add_parentheses, args_begin, args_end, begins_its_line?, comment_line?, comment_lines?, double_quotes_required?, escape_string, first_part_of_call_chain, interpret_string_escapes, line_range, needs_escaping?, on_node, parentheses?, same_line?, to_string_literal, to_supported_styles, trim_string_interporation_escape_character

Methods included from PathUtil

absolute?, hidden_dir?, hidden_file?, hidden_file_in_not_hidden_dir?, match_path?, maybe_hidden_file?, relative_path, smart_path

Constructor Details

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

Instance Method Details

#on_splat(node) ⇒ Object


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# File 'lib/rubocop/cop/lint/redundant_splat_expansion.rb', line 74

def on_splat(node)
  redundant_splat_expansion(node) do
    if array_splat?(node) &&
       (method_argument?(node) || part_of_an_array?(node))
      add_offense(node, message: ARRAY_PARAM_MSG) do |corrector|
        autocorrect(corrector, node)
      end
    else
      add_offense(node) do |corrector|
        autocorrect(corrector, node)
      end
    end
  end
end