Class: DeadCodeTerminator::Cond::EnvIndex

Inherits:
Base
  • Object
show all
Defined in:
lib/dead_code_terminator/cond/env_index.rb

Overview

ENV

s(:send,

s(:const, nil, :ENV), :[],
s(:str, "FLAG"))

Constant Summary

Constants inherited from Base

Base::ELSE, Base::THEN

Instance Attribute Summary

Attributes inherited from Base

#ast, #env

Instance Method Summary collapse

Methods inherited from Base

#initialize

Constructor Details

This class inherits a constructor from DeadCodeTerminator::Cond::Base

Instance Method Details

#given_env_key(ast) ⇒ Object 



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# File 'lib/dead_code_terminator/cond/env_index.rb', line 28

def given_env_key(ast)
  env.keys.detect { |key| ast == s(:str, key) }
end

#value ⇒ Object 



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# File 'lib/dead_code_terminator/cond/env_index.rb', line 11

def value
  return if ast.type != :send

  hash, bracket_meth, *args = ast.children

  return if hash != s(:const, nil, :ENV)

  return if bracket_meth != :[]

  return if args.size != 1

  key = args[0]
  return unless (matched_env_key = given_env_key(key))

  env[matched_env_key] ? THEN : ELSE
end