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Smalltalk On Rubinius
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Konstantin Haase
September 17, 2011
Technology
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Smalltalk On Rubinius
Konstantin Haase
September 17, 2011
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Transcript
Smalltalk On Rubinius Konstantin Haase
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Why implement Smalltalk on Rubinius?
Why create a programming language?
Why create?
"When you don't create things, you become defined by your
tastes rather than ability. Your tastes only narrow and exclude people. So create." why the lucky stiff
Why a programming language?
About programming languages: "I don’t like any of them, and
I don’t think any of them are suitable for the real programming problems of today, whether for systems or for end-users" Alan Kay
Problem Oriented Programming Languages Cairo (~120k SLOC in C) rewritten
in less than 400 lines
Why Smalltalk?
Why Rubinius?
None
1 + 1 1 + 1
this is it this.is.it
GoGaRuCo rock: #hard GoGaRuCo.rock :hard
doc convertFrom: #xml to: #yaml doc.convert(:xml, :ruby)
doc convertFrom: #xml to: #yaml doc.convert from: :xml, to: :ruby
[ 42 ] proc { 42 }
anArray do: [ :each | each doSomething ] an_array.each do
|element| element.do_something end
Textmate version = 2 ifTrue: [ 'no way' ] ifFalse:
[ 'thought so' ] if Textmate.version == 2 "no way" else "thought so" end
Storage current store: #foo; store: #bar storage = Storage.current storage.store
:foo storage.store :bar
Smalltalk claims to look like: 'English'. Judge yourself. Does it.
Ruby.claims.to.look. like "English" Judge.yourself; Does.it?
Reak github.com/rkh/Reak Like Squeak but with R File based (as
opposed to image based)
None
The Rubinius Compiler Pure Ruby Modular and Flexible lib/compiler
None
Parsing with KPeg github.com/evanphx/kpeg
" from Reak.AST.Self " grammar: g [ ^ g str:
'self' ] # from Reak::AST::Return def bootstrap_grammar(g) g.seq "^", :sp, g.t(:expression) end
Rubinius Bytecode
$ rbx compile -B -e 'puts "Hello World"' 0000: push_self
0001: push_literal "Hello World" 0003: allow_private 0004: send_stack :puts, 1
$ rbx compile -B -e 'puts "Hello World"' 0000: push_self
0001: push_literal "Hello World" 0003: allow_private 0004: send_stack :puts, 1
$ rbx compile -B -e 'puts "Hello World"' 0000: push_self
0001: push_literal "Hello World" 0003: allow_private 0004: send_stack :puts, 1
$ rbx compile -B -e 'puts "Hello World"' 0000: push_self
0001: push_literal "Hello World" 0003: allow_private 0004: send_stack :puts, 1
$ rbx compile -B -e 'puts "Hello World"' 0000: push_self
0001: push_literal "Hello World" 0003: allow_private 0004: send_stack :puts, 1
class Object dynamic_method(:display) do |g| g.push_self g.push_local(0) # first argument
g.send(:puts, 1, true) g.ret end end display "Hello World"
Reusing the Rubinius tool chain
None
class Reak::Compiler < Rubinius::Compiler class Parser < Stage stage :parser
next_stage Generator end end
class CustomNode < Reak::AST::Base def self.bootstrap_grammar(g) # grammar definition end
def bytecode(g) # bytecode definition end end
class ConstantAccess < Rubinius::AST::ConstantAccess include Reak::AST::Node Reak::AST::Primary.push self def self.bootstrap_grammar(g)
g.t /[A-Z][a-zA-Z0-9_]*/ end # no bytecode definition necessary end
Rubinius.AST.TrueLiteral subclass: #TrueLiteral [ Reak.AST.Primary push: self. self include: Reak.AST.Node.
self class >> grammar: g [ ^ g str: 'true' ]. ]
" Remember cascades? " g pushSelf; pushLocal: 0; send: #puts
args: 1 private: true; ret.
Reak.AST.Base subclass: #Cascade [ Reak.AST.Expression push: self. bytecode: g [
g pushSelf. cascadedSends do: [:send | g dup. send bytecode: g. g pop ]. lastSend bytecode: g. ] ]
Thanks! github.com / rkh / presentations