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cheery / catpu.hs
Created November 22, 2023 12:11
Pattern unification
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module CatPu where
import Control.Applicative (Alternative (..))
import Control.Monad (MonadPlus (..), foldM, forM)
import Control.Monad.State
import Control.Monad.Except
import Data.List (intersect, elemIndex)
type Goal = SolverState -> Stream SolverState
@cheery
cheery / interaction_combinators.py
Created March 28, 2019 20:43
Interaction combinators
View interaction_combinators.py
# -*- encoding: utf-8 -*-
# Implements symmetric interaction combinators
# I took some ideas from Victor Maia's projects.
# Bunch of cells form an interaction net.
# It's a half-edge graph.
class Cell:
def __init__(self, kind):
self.ports = (Port(self), Port(self), Port(self))
self.kind = kind # 'era', 'con', 'fan'
@cheery
cheery / vklayer
Created February 19, 2016 23:27
Run scripts with added vulkan layers
View vklayer
#!/usr/bin/env python
"""
Run programs with added vulkan layers.
Author: Henri Tuhola <henri.tuhola@gmail.com>
License: MIT
Date: 2016-2-20
"""
import argparse, json, os, sys
@cheery
cheery / hedberg.agda
Created February 9, 2023 16:36
Hedberg's theorem
View hedberg.agda
{-# OPTIONS --cubical #-}
module hedberg where
open import Cubical.Core.Everything
open import Cubical.Foundations.Prelude
open import Cubical.Foundations.GroupoidLaws
data Empty : Set where
absurd : {A : Set} → Empty → A
@cheery
cheery / newtry6.agda
Created January 26, 2023 16:29
Normalizer for lambda calculus
View newtry6.agda
module newtry6 where
-- derived from https://gist.github.com/rntz/2543cf9ef5ee4e3d990ce3485a0186e2
-- http://eprints.nottingham.ac.uk/41385/1/th.pdf
open import Level
open import Function using (id; _∘_)
infixr 5 _⇒_
data Ty : Set where
@cheery
cheery / newtry.agda
Created January 25, 2023 16:33
Preservation proof doesn't go through.
View newtry.agda
module newtry where
import Relation.Binary.PropositionalEquality as Eq
open Eq using (_≡_; refl)
open import Relation.Nullary using (Dec; yes; no)
open import Relation.Nullary.Decidable using (True; toWitness)
open import Data.Fin
open import Data.Nat
open import Data.Product
open import Data.Empty
@cheery
cheery / demo.agda
Created January 23, 2023 18:13
Failed normalization by evaluation
View demo.agda
module demo where
open import Agda.Builtin.Equality
open import Data.List
open import Data.Vec
open import Data.Nat
open import Data.Fin
open import Data.Fin.Base
open import Data.Product
open import Data.Sum
@cheery
cheery / demo..agda
Created January 21, 2023 05:36
Functors in lambda calculus
View demo..agda
{-# OPTIONS --type-in-type #-}
module demo where
open import Data.Product
open import Data.Unit
open import Agda.Builtin.Equality
data Unit₁ : Set₁ where
point : Unit₁
@cheery
cheery / demo.agda
Last active January 20, 2023 12:28
chu spaces
View demo.agda
{-# OPTIONS --guardedness #-}
module demo where
open import Data.Product
open import Data.Empty
open import Agda.Builtin.Equality
open import Agda.Primitive
sym : ∀ {a} {A : Set a} {x y : A} → x ≡ y → y ≡ x
sym refl = refl
@cheery
cheery / lr.py
Created May 3, 2015 21:25
Hand-written LR parser
View lr.py
def state_0(ch):
if ch == None:
return None
if ch == "1":
return state_4
if ch == 'int':
return state_1
if ch == 'plus':
return state_1
assert False