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# File 'lib/type_struct.rb', line 52
def new(**args, &block)
c = Class.new(TypeStruct) do
const_set :DEFINITION, args
class << self
alias_method :new, :original_new
def from_hash(h)
unless Hash === h
h = h.to_hash if h.respond_to?(:to_hash)
unless Hash === h
raise TypeError, "#{self}.from_hash only accept Hash got `#{h.class}'"
end
end
args = {}
h.each do |key, value|
key = key.to_sym
t = type(key)
args[key] = try_convert(t, key, value)
end
new(args)
end
def definition
const_get(:DEFINITION)
end
def members
definition.keys
end
def type(k)
definition[k]
end
def valid?(k, v)
definition[k] === v
end
private
def try_convert(klass, key, value)
return nil unless !klass.nil? && !value.nil?
case klass
when Union
errors = []
klass.each do |k|
t = begin
try_convert(k, key, value)
rescue TypeError => e
errors << e
nil
end
return t if !t.nil?
end
raise UnionNotFoundError, "#{klass} is not found with value `#{value}'\nerrors:\n#{errors.join("\n")}"
when ArrayOf
unless Array === value
raise TypeError, "#{self}##{key} expect #{klass.inspect} got #{value.inspect}"
end
value.map { |v| try_convert(klass.type, key, v) }
when HashOf
unless Hash === value
raise TypeError, "#{self}##{key} expect #{klass.inspect} got #{value.inspect}"
end
new_hash = {}
value.each do |hk, hv|
new_hash[hk] = try_convert(klass.value_type, key, hv)
end
new_hash
else
if klass.respond_to?(:ancestors)
if klass.ancestors.include?(TypeStruct)
klass.from_hash(value)
elsif klass.ancestors.include?(Struct)
struct = klass.new
value.each { |k, v| struct[k] = v }
struct
elsif klass === value
value
else
raise TypeError, "#{self}##{key} expect #{klass.inspect} got #{value.inspect}"
end
else
value
end
end
end
end
args.each_key do |k|
define_method(k) do
instance_variable_get("@#{k}")
end
define_method("#{k}=") do |v|
unless self.class.valid?(k, v)
raise TypeError, "#{self.class}##{k} expect #{self.class.type(k)} got #{v.inspect}"
end
instance_variable_set("@#{k}", v)
end
end
end
if block_given?
c.module_eval(&block)
end
c
end
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