Sha256: 03855dcaf72f2ef96d44978a7621f5e91a22c75b7581ad7daab38f6d0e07e2cf
Contents?: true
Size: 1.27 KB
Versions: 6
Compression:
Stored size: 1.27 KB
Contents
# frozen_string_literal: true
require 'plumb/composable'
module Plumb
class TaggedHash
include Composable
attr_reader :key, :children
def initialize(hash_type, key, children)
@hash_type = hash_type
@key = Key.wrap(key)
@children = children
raise ArgumentError, 'all types must be HashClass' if @children.size.zero? || @children.any? do |t|
!t.is_a?(HashClass)
end
raise ArgumentError, "all types must define key #{@key}" unless @children.all? { |t| !!t.at_key(@key) }
# types are assumed to have literal values for the index field :key
@index = @children.each.with_object({}) do |t, memo|
key_type = t.at_key(@key)
raise ParseError, "key type at :#{@key} #{key_type} must be a Match type" unless key_type.is_a?(MatchClass)
memo[key_type.children[0]] = t
end
freeze
end
def call(result)
result = @hash_type.call(result)
return result unless result.valid?
child = @index[result.value[@key.to_sym]]
return result.invalid(errors: "expected :#{@key.to_sym} to be one of #{@index.keys.join(', ')}") unless child
child.call(result)
end
private
def _inspect = "TaggedHash[#{@key.inspect}, #{@children.map(&:inspect).join(', ')}]"
end
end
Version data entries
6 entries across 6 versions & 1 rubygems