Class: RuboCop::Cop::Style::InPatternThen

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector, TargetRubyVersion
Defined in:
lib/rubocop/cop/style/in_pattern_then.rb

Overview

This cop checks for `in;` uses in `case` expressions.

Examples:

# bad
case expression
in pattern_a; foo
in pattern_b; bar
end

# good
case expression
in pattern_a then foo
in pattern_b then bar
end

Constant Summary collapse

MSG =
'Do not use `in %<pattern>s;`. Use `in %<pattern>s then` instead.'

Constants inherited from Base

Base::RESTRICT_ON_SEND

Instance Attribute Summary

Attributes inherited from Base

#config, #processed_source

Instance Method Summary collapse

Methods included from AutoCorrector

support_autocorrect?

Methods included from TargetRubyVersion

minimum_target_ruby_version, required_minimum_ruby_version, support_target_ruby_version?

Methods inherited from Base

#add_global_offense, #add_offense, autocorrect_incompatible_with, badge, #callbacks_needed, callbacks_needed, #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, #parse, #ready, #relevant_file?, support_autocorrect?, support_multiple_source?, #target_rails_version, #target_ruby_version

Methods included from ExcludeLimit

#exclude_limit

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

silence_warnings

Constructor Details

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

Instance Method Details

#on_in_pattern(node) ⇒ Object


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# File 'lib/rubocop/cop/style/in_pattern_then.rb', line 29

def on_in_pattern(node)
  return if node.multiline? || node.then? || !node.body

  pattern = node.pattern
  pattern_source = if pattern.match_alt_type?
                     alternative_pattern_source(pattern)
                   else
                     pattern.source
                   end

  add_offense(node.loc.begin, message: format(MSG, pattern: pattern_source)) do |corrector|
    corrector.replace(node.loc.begin, ' then')
  end
end