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|
module Morpher
class Evaluator
# Mixin for nary evaluators
module Nary
CONCORD = Concord::Public.new(:body)
PRINTER = lambda do |_|
name
indent do
visit_many(:body)
end
end
# Return AST
#
# @return [AST::Node]
#
# @api private
#
def node
s(type, *body.map(&:node))
end
private
# Return positive evaluation
#
# @param [Object] input
# @param [Array<Evaluation>] evaluations
#
# @return [Evaluation]
#
# @api private
#
def evaluation_positive(input, evaluations)
Evaluation::Nary.success(
evaluator: self,
input: input,
output: true,
evaluations: evaluations
)
end
# Return negative evaluation
#
# @param [Object] input
# @param [Array<Evaluation>] evaluations
#
# @return [Evaluation]
#
# @api private
#
def evaluation_negative(input, evaluations)
Evaluation::Nary.success(
evaluator: self,
input: input,
output: false,
evaluations: evaluations
)
end
# Return evaluation error
#
# @param [Object] input
# @param [Array<Evaluation>] evaluations
#
# @return [Evaluation]
#
# @api private
#
def evaluation_error(input, evaluations)
Evaluation::Nary.error(
evaluator: self,
input: input,
evaluations: evaluations
)
end
# Hook called when module gets included
#
# @return [undefined]
#
# @api private
#
def self.included(descendant)
descendant.class_eval do
include CONCORD
printer(&PRINTER)
end
end
private_class_method :included
end # Nary
end # Evaluator
end # Morpher
|
