137 lines
2.8 KiB
Ruby
137 lines
2.8 KiB
Ruby
# encoding: utf-8
|
|
|
|
module Mutant
|
|
class CLI
|
|
# A classifier for input strings
|
|
class Classifier < Matcher
|
|
include AbstractType, Adamantium::Flat, Concord.new(:cache, :match)
|
|
|
|
include Equalizer.new(:identifier)
|
|
|
|
SCOPE_NAME_PATTERN = /[A-Za-z][A-Za-z\d_]*/.freeze
|
|
SCOPE_OPERATOR = '::'.freeze
|
|
CBASE_PATTERN = /\A#{SCOPE_OPERATOR}/.freeze
|
|
|
|
METHOD_NAME_PATTERN = Regexp.union(
|
|
/[A-Za-z_][A-Za-z\d_]*[!?=]?/,
|
|
*OPERATOR_METHODS.map(&:to_s)
|
|
).freeze
|
|
|
|
SCOPE_PATTERN = /
|
|
(?:#{SCOPE_OPERATOR})?#{SCOPE_NAME_PATTERN}
|
|
(?:#{SCOPE_OPERATOR}#{SCOPE_NAME_PATTERN})*
|
|
/x.freeze
|
|
|
|
REGISTRY = []
|
|
|
|
# Register classifier
|
|
#
|
|
# @return [undefined]
|
|
#
|
|
# @api private
|
|
#
|
|
def self.register
|
|
REGISTRY << self
|
|
end
|
|
private_class_method :register
|
|
|
|
# Return constant
|
|
#
|
|
# @param [String] location
|
|
#
|
|
# @return [Class|Module]
|
|
#
|
|
# @api private
|
|
#
|
|
def self.constant_lookup(location)
|
|
location
|
|
.sub(CBASE_PATTERN, EMPTY_STRING)
|
|
.split(SCOPE_OPERATOR)
|
|
.reduce(Object) do |parent, name|
|
|
parent.const_get(name, nil)
|
|
end
|
|
end
|
|
|
|
# Return matchers for input
|
|
#
|
|
# @return [Classifier]
|
|
# if a classifier handles the input
|
|
#
|
|
# @return [nil]
|
|
# otherwise
|
|
#
|
|
# @api private
|
|
#
|
|
def self.build(*arguments)
|
|
classifiers = REGISTRY.map do |descendant|
|
|
descendant.run(*arguments)
|
|
end.compact
|
|
|
|
raise if classifiers.length > 1
|
|
|
|
classifiers.first
|
|
end
|
|
|
|
# Run classifier
|
|
#
|
|
# @param [Cache] cache
|
|
#
|
|
# @param [String] input
|
|
#
|
|
# @return [Classifier]
|
|
# if input is handled by classifier
|
|
#
|
|
# @return [nil]
|
|
# otherwise
|
|
#
|
|
# @api private
|
|
#
|
|
def self.run(cache, input)
|
|
match = self::REGEXP.match(input)
|
|
return unless match
|
|
|
|
new(cache, match)
|
|
end
|
|
|
|
# No protected_class_method in ruby :(
|
|
class << self; protected :run; end
|
|
|
|
# Enumerate subjects
|
|
#
|
|
# @return [self]
|
|
# if block given
|
|
#
|
|
# @return [Enumerator<Subject>]
|
|
# otherwise
|
|
#
|
|
# @api private
|
|
#
|
|
def each(&block)
|
|
return to_enum unless block_given?
|
|
matcher.each(&block)
|
|
self
|
|
end
|
|
|
|
# Return identifier
|
|
#
|
|
# @return [String]
|
|
#
|
|
# @api private
|
|
#
|
|
def identifier
|
|
match.to_s
|
|
end
|
|
memoize :identifier
|
|
|
|
# Return matcher
|
|
#
|
|
# @return [Matcher]
|
|
#
|
|
# @api private
|
|
#
|
|
abstract_method :matcher
|
|
private :matcher
|
|
|
|
end # Classifier
|
|
end # CLI
|
|
end # Mutant
|