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]

Instance Attribute Summary

Attributes inherited from Cop

#autocorrect, #corrections, #debug, #disabled_lines, #offences

Instance Method Summary collapse

Methods inherited from Cop

#add_offence, all, #autocorrect_action, cop_name, cop_type, #do_autocorrect, #ignore_node, inherited, #initialize, lint?, #name, rails?, style?

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(:warning, e2.loc.expression, MSG)
    end
  end
end