Module: GuessMethod::GuessConstant

Included in:
Module
Defined in:
lib/guessmethod.rb

Overview

The GuessConstant module aliases out const_missing and replaces it with its own, which attempts to find a similarly named constant for the object at hand. If it finds one, it returns that instead, and prints a message to stderr explaining as much. If it doesn’t find a suitable constant, the orignial const_missing gets called.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(base) ⇒ Object

:nodoc:



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# File 'lib/guessmethod.rb', line 65

def self.extended(base)   #:nodoc:
  base.class_eval do
    unless respond_to? :const_missing
      def self.const_missing(sym); super; end
    end
    class << self
      alias_method :unguessed_const_missing, :const_missing
      alias_method :const_missing, :guess_const_missing
    end
  end
end

Instance Method Details

#guess_const_missing(sym) ⇒ Object 



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# File 'lib/guessmethod.rb', line 77

def guess_const_missing(sym)
  if GuessMethodOptions[:active]
    begin
      return unguessed_const_missing(sym)
    rescue NameError => e
      possible_consts = GuessMethodGuesser.find_closest(self.constants, sym)
      case possible_consts.size
      when 1
        call_const = possible_consts.first
        $stderr.puts GuessMethodOutputter.replacing_const(sym, call_const, self)
        self.const_get(call_const)
      when 0
        $stderr.puts GuessMethodOutputter.no_const_in_threshold(sym, self)
        raise e
      else
        $stderr.puts GuessMethodOutputter.ambigious_const(sym, possible_consts, self)
        raise e
      end
    end
  else
    unguessed_const_missing(sym)
  end
end