Sha256: 6c5801b87c4f2b84c2a78238c08b39fec548321d9fd878397a8e602bb4aeac9e
Contents?: true
Size: 959 Bytes
Versions: 8
Compression:
Stored size: 959 Bytes
Contents
require 'hyperion/aux/bug_error'
class Hyperion
class Util
def self.nil_if_error
begin
yield
rescue StandardError
return nil
end
end
def self.guard_param(value, what, expected_type=nil, &pred)
pred ||= proc { |x| x.is_a?(expected_type) }
pred.call(value) or fail BugError, "You passed me #{value.inspect}, which is not #{what}"
end
# reimplement callcc because ruby has deprecated it
def self.callcc()
in_scope = true
cont = proc do |retval|
unless in_scope
raise "Cannot invoke this continuation. Control has left this continuation's scope."
end
raise CallCcError.new(retval)
end
yield(cont)
rescue CallCcError => e
e.retval
ensure
in_scope = false
end
class CallCcError < RuntimeError
attr_accessor :retval
def initialize(retval)
@retval = retval
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems