Class: Rubocop::Cop::Lint::UnreachableCode

Inherits:
Cop
  • Object
show all
Defined in:
lib/rubocop/cop/lint/unreachable_code.rb

Overview

This cop checks for unreachable code. The check are based on the presence of flow of control statement in non-final position in begin(implicit) blocks.

Constant Summary collapse

MSG = 
'Unreachable code detected.'
NODE_TYPES = 
[:return, :next, :break, :retry, :redo]
FLOW_COMMANDS = 
[:throw, :raise, :fail]

Constants inherited from Cop

Cop::OPERATOR_METHODS

Constants included from Util

Util::PROC_NEW_NODE

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offences, #processed_source

Instance Method Summary collapse

Methods inherited from Cop

#add_offence, all, #autocorrect?, #config_to_allow_offences, #config_to_allow_offences=, #cop_config, cop_name, #cop_name, cop_type, #debug?, #exclude_file?, #exclude_paths, #ignore_node, #include_file?, #include_paths, inherited, #initialize, lint?, #message, non_rails, rails?, #relevant_file?, style?, #support_autocorrect?

Methods included from Util

block_length, command?, comment_line?, const_name, first_part_of_call_chain, lambda?, lambda_or_proc?, line_range, on_node, proc?, range_with_surrounding_space, source_range, strip_quotes

Constructor Details

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

Instance Method Details

#on_begin(node) ⇒ Object 



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# File 'lib/rubocop/cop/lint/unreachable_code.rb', line 15

def on_begin(node)
  expressions = *node

  expressions.each_cons(2) do |e1, e2|
    if NODE_TYPES.include?(e1.type) || flow_command?(e1)
      add_offence(e2, :expression)
    end
  end
end