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require_relative "did_you_mean/version"
require_relative "did_you_mean/core_ext/name_error"
require_relative "did_you_mean/spell_checker"
require_relative 'did_you_mean/spell_checkers/name_error_checkers'
require_relative 'did_you_mean/spell_checkers/method_name_checker'
require_relative 'did_you_mean/spell_checkers/key_error_checker'
require_relative 'did_you_mean/spell_checkers/null_checker'
require_relative 'did_you_mean/formatters/plain_formatter'
require_relative 'did_you_mean/tree_spell_checker'
# The +DidYouMean+ gem adds functionality to suggest possible method/class
# names upon errors such as +NameError+ and +NoMethodError+. In Ruby 2.3 or
# later, it is automatically activated during startup.
#
# @example
#
# methosd
# # => NameError: undefined local variable or method `methosd' for main:Object
# # Did you mean? methods
# # method
#
# OBject
# # => NameError: uninitialized constant OBject
# # Did you mean? Object
#
# @full_name = "Yuki Nishijima"
# first_name, last_name = full_name.split(" ")
# # => NameError: undefined local variable or method `full_name' for main:Object
# # Did you mean? @full_name
#
# @@full_name = "Yuki Nishijima"
# @@full_anme
# # => NameError: uninitialized class variable @@full_anme in Object
# # Did you mean? @@full_name
#
# full_name = "Yuki Nishijima"
# full_name.starts_with?("Y")
# # => NoMethodError: undefined method `starts_with?' for "Yuki Nishijima":String
# # Did you mean? start_with?
#
# hash = {foo: 1, bar: 2, baz: 3}
# hash.fetch(:fooo)
# # => KeyError: key not found: :fooo
# # Did you mean? :foo
#
#
# == Disabling +did_you_mean+
#
# Occasionally, you may want to disable the +did_you_mean+ gem for e.g.
# debugging issues in the error object itself. You can disable it entirely by
# specifying +--disable-did_you_mean+ option to the +ruby+ command:
#
# $ ruby --disable-did_you_mean -e "1.zeor?"
# -e:1:in `<main>': undefined method `zeor?' for 1:Integer (NameError)
#
# When you do not have direct access to the +ruby+ command (e.g.
# +rails console+, +irb+), you could applyoptions using the +RUBYOPT+
# environment variable:
#
# $ RUBYOPT='--disable-did_you_mean' irb
# irb:0> 1.zeor?
# # => NoMethodError (undefined method `zeor?' for 1:Integer)
#
#
# == Getting the original error message
#
# Sometimes, you do not want to disable the gem entirely, but need to get the
# original error message without suggestions (e.g. testing). In this case, you
# could use the +#original_message+ method on the error object:
#
# no_method_error = begin
# 1.zeor?
# rescue NoMethodError => error
# error
# end
#
# no_method_error.message
# # => NoMethodError (undefined method `zeor?' for 1:Integer)
# # Did you mean? zero?
#
# no_method_error.original_message
# # => NoMethodError (undefined method `zeor?' for 1:Integer)
#
module DidYouMean
# Map of error types and spell checker objects.
SPELL_CHECKERS = Hash.new(NullChecker)
# Adds +DidYouMean+ functionality to an error using a given spell checker
def self.correct_error(error_class, spell_checker)
SPELL_CHECKERS[error_class.name] = spell_checker
error_class.prepend(Correctable) unless error_class < Correctable
end
correct_error NameError, NameErrorCheckers
correct_error KeyError, KeyErrorChecker
correct_error NoMethodError, MethodNameChecker
# Returns the currenctly set formatter. By default, it is set to +DidYouMean::Formatter+.
def self.formatter
@@formatter
end
# Updates the primary formatter used to format the suggestions.
def self.formatter=(formatter)
@@formatter = formatter
end
self.formatter = PlainFormatter.new
end