ramirez7

{-# LANGUAGE DataKinds #-}
{-# LANGUAGE GADTs #-}

module HList.GADT where

import Data.Kind

data HList (ts :: [Type]) where
  HNil :: HList '[]
  HCons :: forall t ts. t -> HList ts -> HList (t ': ts)

ramirez7

{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE LambdaCase #-}

import Data.Kind

data I a
data X a

data XX

ramirez7

:{
let doTH code = do
      u <- Data.Unique.newUnique
      let decls = "ghciTH_" ++ show (Data.Unique.hashUnique u)
      pure $ unlines
        [ unwords ["let", decls, "=", code]
        , "() = ();" ++ decls
        ]
:}

ramirez7

concat(zipWith replicate [1,2,1,0] "cold")

-- Desugar string literal to [Char]
concat(zipWith replicate [1,2,1,0] ['c', 'o', 'l', 'd'])

-- https://hackage.haskell.org/package/base-4.19.0.0/docs/src/GHC.List.html#zipWith
-- Rewritten to not use the "go" helper, zipWith is:
-- zipWith f [] _ = []
-- zipWith f _ [] = []
-- zipWith f (x:xs) (y:ys) = f x y : zipWith f xs ys

ramirez7

ramirez7

package main

import (
	"fmt"
	"os"
	"os/signal"
	"sync/atomic"
	"syscall"
)

ramirez7

dist-newstyle/*
.liquid/*

ramirez7

# Keep track of build times in a lightweight way

# The log file is based on branch name
function time-log-file() {
    echo "$(time-log-dir)/time.$(git rev-parse --abbrev-ref HEAD | sed s#/#--#g).log"
}

function time-log-dir() {
    echo "$(git rev-parse --show-toplevel)/.time-logs"
}

ramirez7

[armando@nixos:~]$ ghci
GHCi, version 9.2.8: https://www.haskell.org/ghc/  :? for help
Loaded GHCi configuration from /home/armando/.ghci
λ :seti -XDeriveGeneric
λ import GHC.Generics
λ data P = P Int Bool String deriving Generic
λ data S = S1 | S2  | S3 deriving Generic
λ data R = R { x :: Int, y :: Bool, z :: String } deriving Generic
λ data SR = S1 { x1 :: Int } | S2 { y2 :: Bool}  | S3 { z3 :: String } deriving Generic
λ :t from

ramirez7

{-# LANGUAGE ImportQualifiedPost #-}
{-# LANGUAGE DeriveGeneric #-}

module MaybeVoidAeson where

import Data.Aeson qualified as Ae
import GHC.Generics

data T a = T { x :: Int, y :: a } deriving Generic