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require "naught/null_class_builder/command"
module Naught
class NullClassBuilder
module Commands
# Adds explicit conversion methods delegating to nil
#
# These methods return the same values that nil returns:
# - to_a => []
# - to_c => (0+0i)
# - to_f => 0.0
# - to_h => {}
# - to_i => 0
# - to_r => (0/1)
# - to_s => ""
#
# @api private
class DefineExplicitConversions < Command
METHODS = %i[to_a to_c to_f to_h to_i to_r to_s].freeze
private_constant :METHODS
# Install explicit conversion methods
# @return [void]
# @api private
def call
defer { |subject| METHODS.each { |name| subject.define_method(name) { nil.public_send(name) } } }
end
end
end
end
end
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