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Keynote Powered by Rabbit 0.9.1

Keynote

Yukihiro "Matz" Matsumoto

@yukihiro_matz

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Acknowledgment

In memory of

Guy Decoux

_why the lucky stiff

Zed Shaw

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Today's Menu

History

Future

Diversity

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History

10th Annual RubyConf

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History

9 Keynotes by me

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2001

Tampa, FL

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2001

Human-OrientedProgramming in Ruby

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2002

Seattle, WA

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2002

Be Minor, Be Cool

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2003

Austin, TX

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2003

Visions for the Future

How Ruby Sucks

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2004

Chantilly, VA

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2004

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2004

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2005

San Diego, CA

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2005

Visions for the Future

Wild and Weird Ideas

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2006

The Return of the Bikeshedor Nuclear Plant in the

Backyard

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2007

Charlotte, NC

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2007

Language Matters

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2008

Orlando, FL

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2008

Reasons behind Ruby

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2009

San Francisco, CA

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2009

The 0.8 True Language (ZEPT)

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2010

Future and Diversity

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Future and Diversity

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The Future

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Ruby 2.0

Traits

Method Combination

Keyword arguments

Namespaces

a few other nifty features

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Traits

trait

a trait is a collection of methods,used as a "simple conceptualmodel for structuring objectoriented programs".

from Wikipedia (en)

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What's wrong for

Modules?

Conflict detection

Conflict resolution

Tree modification

No method combination

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Conflict Detection

name conflict

intentional (overriding)?

or accidental?

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Conflict Problem

module Americanattr_accessor :address

endmodule Japanese

attr_accessor :addressendclass JapaneseAmerican include American include JapaneseendJapaneseAmerican.new.address# which address?p JapaneseAmerican.ancestors# => [JapaneseAmerican, Japanese, American, Object, Kernel]

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Solution

We will introduce #mix

#mix will replace #include

#mix can detect and

resolve conflict

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Module#mix

injects the current snapshotinto other class/module.

raises error when nameconflict

unless you resolve itexplicitly

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Conflict Problem


end

module Japaneseattr_accessor :address

endclass JapaneseAmerican

# Japanese comes First include American include Japaneseend

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Detecting Conflict


endmodule Japaneseattr_accessor :address

endclass JapaneseAmerican

mix Americanmix Japanese # => address conflict!

end

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Resolving Conflict

class JapaneseAmericanmix American, :address => :us_addressmix Japanese, :address => :jp_address

end

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Tree Modification

module M1; endclass C1; include M1; end

module M2; end

module M1; include M2; end

p C1.ancestors# [C1, M1, Object, Kernel]

p M1.ancestors# [M1, M2]

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Tree Modification

#mix copies attributes

so tree modificationafterward does not affect.

consistent at leaset

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alias_method_chain

ugly

fragile to multiple wrapping

we want to wrap methods

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Module#prepend

We will introduce #prepend

#prepend put the module

before the current class/module

methods defined in theclass will wrap methods ofsame names

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Module#prepend

module Foo deffoo

p :before super

p :after endendclass Bar deffoo

p :foo

endprepend Foo

endBar.new.foo # :before, :foo, :after

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Keyword Arguments

calling

1.step(by: 2, to: 20) do |i|p i

end

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Keyword Arguments

defining

defstep(by: step, to: limit)...

end

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Keyword Arguments

Mere expanded hashargument at the end

Automatic decomposition

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Namespaces

encapsulation of monkeypatching

monkey patching is globalmodification

embodies freedom, butdangerous

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Namespaces

encapsulation of monkey

patchingclasssbox / selectornamespace / refinement /

whatever

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What if

class Integer

def/(other) return quo(other) endendp 1/2 # => (1/2)

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Using Refinement

module Rationalize

using MathNp 1/2 # => (1/2)

end

p 1/2 # => 0

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Real Private Methods

class HasPrivate module Private defpriv end

endusing Private defpub

priv endend

h = HasPrivate.newh.priv # => errorh.instance_eval {priv # => error

}

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FAQ

When will they be available?

Ruby 2.0

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FAQ

When will Ruby2.0 be?Christmas

on whatever year!

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Diversity

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I love Diversity

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I dislike Diversity

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The Ruby Language

specification

implementation

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The Ruby Language

specification

Standard Ruby (ISO)

RubySpec

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The Ruby Language

implementation

CRuby

JRuby

Rubinius

MagLev

...

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Al i fill h

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Alternative to fill the

Niche

JRuby for JVM

MacRuby for Mac

MagLev for GemStone

Ruboto for Android

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Y h Ni h

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Yet another Niche

Embedding

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Rit

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Rite

The New Comer

Light weight implmentation

of usable subset of the

Ruby language

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T t

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Target

Embedding

Small devices

Digital Appliances

Applications (Game?)

and more

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E b dd bl R b

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Embeddable Ruby

think of Lua

with better language

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P i i l

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Principle

Components

Configurable

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Componentsthe implementation will becombination of components

parser

virtual machine

garbage collector

debugger

class libraries67/88

C fi bl

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Configurable

to minimal set of featuresrequired for an application

no universal behaviorbetween platforms

e.g. no file I/O for small devices

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C fi bl

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Configurable

use double or float

use int, long or long long forfixnums

ASCII or UTF-8

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R i t

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Requirement

portableminimal requirement: standardC (C99)

should run on PC / RTOS /free standing

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less latency70/88

I l t i D t il

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Implementaion Detail

register-based virtualmachine

32bit word-code

floats are immediate

(possibly generational)incremental mark-sweep GC

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What can I do ith Rite?

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What can I do with Rite?

embedding

application embedding

small devices

e.g. digital TV

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concurrentassign virtual machine for eachthread

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the Ruby chip

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the Ruby chip

by Prof. Tanaka from KyushuInstitute of Technology

MIPS-like FPGA CPU with afew instructions added

that help method look-up

and garbage collection marking

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FAQ

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FAQ

When will Rite available?

I don't know, sorry.But it's a part of Japanesegovernment funded two

year project (2010-2011)

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FAQ

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FAQ

Will Rite be Open-Source?

Yes, probably underMIT license.

But we need business

model to satisfy thegovernment.

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FAQ

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FAQ

Will Rite be Open-Source?

We might choose GPL pluscommercial subscription

model (a la MySQL).

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FAQ

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FAQ

Will Rite replace MRI?

No, Rite will not be a full-featured, universal

implementation.

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FAQ

Will Rite replace MRI?

It is a Domain SpecificImplementation, like

Ruboto.

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FAQ

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FAQ

How about C API?

Rite will have different CAPI from CRuby.

Currently we have no plan

to provide compatibilitylayer.

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FAQ

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FAQ

Will Rite support M17N?

No, you have to configuresingle character encoding

from ASCII or UTF-8 in

compile time.

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FAQ

Will Rite support (native)threads?

No, to use threads you canuse multiple VM per nativethreads. Rite may support

fibers in the future.

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FAQ

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FAQ

How can I contribute to Rite?

Wait until we make it open-source. We will open it on

github.

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FAQ

Rite sounds familier

Originally Rite was a codename for the first Ruby 2.0

virtual machine, whichwas replaced by YARV. It's

coind from Ruby Lite.

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FAQ

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FAQ

Do you resign from CRuby?

No, but I have spent lesstime on CRuby recently

anyway.

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FAQ

Do you resign from CRuby?

I will keep being a

maintainer of CRuby. Andabove all, I will keep being

active as the creator of

the language and, theleader of the community.

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Thank you!

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