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Compiling A Dependently Typed Language To Ruby Michael R. Bernstein RubyNation / 2015.6.12 / Silver Spring, Maryland

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Why?

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New ways of looking at how programs are designed, written, executed, optimized, refactored, etc.

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A New Lens

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Compilers Are Dope And Also A Little Bit About Fancy Types Michael R. Bernstein RubyNation / 2015.6.12 / Silver Spring, Maryland

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Very Interesting

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Why?

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How?

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Compilers

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Compiler: - a computer program - that consumes computer programs - and produces computer programs

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Compiler: - a computer program - that does whatever you want

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[Animated image representing the sheer awesomeness of COMPILERS]

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“Modern Compiler Implementation in ML” Appel

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C ASM ????

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X Y ????

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Idris Ruby ????

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Idris Ruby Rainbows, wizard dust, prayers, mystical insights, etc.

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Intermediate Representations

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Idris Ruby ????

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LAMBDA CALCULUS

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Everything that is computable can be expressed in terms of the lambda calculus.

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Everything that is computable can be compiled to the lambda calculus.

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Intermediate Representations Intermediate Representations Intermediate Representations Intermediate Representations Intermediate Representations Intermediate Representations

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TT TT Case IR Case IR Lift IR Defunc IR ANF Idris ???

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TT TT Case IR Case IR Lift IR Defunc IR ANF Idris PHP

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Tour and Demo!

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DEEP BREATH

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Type Systems

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[Animated image representing the sheer awesomeness of TYPE SYSTEMS]

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Dependent Types

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Fancy Types

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Expressive Types

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pythag : Int -> List (Int, Int, Int) counter_rpc : Int -> Maybe Int -> Process (Maybe Int) (Int,Int)

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Program Phases

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Syntax Check Compile Execute Test Type Check Write

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Syntax Check Compile Execute Test Type Check Write

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Syntax Check Compile Execute Test Type Check Write

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More People To Read

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Stephanie Weirich

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Conor McBride

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Philip Wadler

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Works Cited

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Sam Elliot, Edwin Brady, #idris, RubyNation & you! Acknowledgements

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Thank You w michaelrbernste.in t @mrb_bk