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Contents
# frozen_string_literal: true
module Kind
class Result::Success < Result::Monad
DEFAULT_TYPE = :ok
def success?
true
end
def value_or(_default = UNDEFINED, &block)
@value
end
def map(callable = UNDEFINED, &fn)
_resolve_map(callable, fn)
rescue Kind::Monad::Error => e
raise e
rescue StandardError => e
Result::Failure[:exception, e]
end
alias_method :then, :map
alias_method :and_then, :map
def map!(callable = UNDEFINED, &fn)
_resolve_map(callable, fn)
end
alias_method :|, :map!
alias_method :>>, :map!
alias_method :then!, :map!
alias_method :and_then!, :map!
def inspect
'#<%s type=%p value=%p>' % ['Kind::Success', type, value]
end
private
def _resolve_map(callable, fn)
callable.respond_to?(:call) ? _map(callable) : _map(fn)
end
def _map(fn)
monad = fn.call(@value)
return monad if Result::Monad === monad
raise Kind::Monad::Error.new('Kind::Success | Kind::Failure', monad)
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems