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.gitignore vendored
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dist
dist-*
cabal-dev
*.o
*.hi
*.hie
*.chi
*.chs.h
*.dyn_o
*.dyn_hi
.hpc
.hsenv
.cabal-sandbox/
cabal.sandbox.config
*.prof
*.aux
*.hp
*.eventlog
.stack-work/
cabal.project.local
cabal.project.local~
.HTF/
.ghc.environment.*

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# Revision history for really-bad-compiler-in-haskell
## 0.1.0.0 -- YYYY-mm-dd
* First version. Released on an unsuspecting world.

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# Really Bad Compiler in Haskell
# really-bad-compiler-in-haskell
A compiler written in Haskell that is really bad (I do not know what language I am going to compile yet). Built for the Introduction to Compiler Design class at The University of Texas at Dallas.
Main repo: https://git.sudoer.ch/me/really-bad-compiler-in-haskell
## Build Instructions
- Clone the repo.
- Use `ghcup` to install all of the Haskell tools.
- Use `stack build` and `stack run <file>` to run the program.
## Credits
### Learning Resources Used
- Introduction to Compiler Design class at The University of Texas at Dallas, taught by Charles Averill
- learnyouahaskell.com (for learning Haskell basics)
- https://akashagrawal.me/2017/01/19/beginners-guide-to-megaparsec.html
- https://markkarpov.com/tutorial/megaparsec.html (for help writing a Haskell equation parser)
### Tools
- Language: Haskell
- Haskell tools: GHCup, Stack, Cabal
- Libraries: megaparsec, parser-combinators, text
- IDE: VSCodium
- Git platform: Forgejo
- AI: Phind
- Search: Kagi, Stack Overflow
A compiler written in Haskell that is really bad (I do not know what language I am going to compile yet)

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module Eval.Expression (evalExpr) where
import Objects.Expression
eval :: Expr -> Int
eval (Lit x) = x
eval (Add x y) = eval x + eval y
eval (Sub x y) = eval x - eval y
eval (Mul x y) = eval x * eval y
eval (Div x y) = eval x `div` eval y
evalExpr :: Expr -> Int
evalExpr = eval

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module Main (main) where
import Data.Either
import Eval.Expression
import Objects.Expression
import Parser.Expression
import System.Environment
import Text.Megaparsec
parseResult :: ParseResult
parseResult = parseExpr "2+3*4"
getRight :: ParseResult -> Expr
getRight (Right r) = r
expr = getRight parseResult
result = evalExpr expr
main = do
print result

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module Objects.Expression
( Expr
( Lit,
Add,
Sub,
Mul,
Div
),
-- solve,
)
where
data Expr
= Lit Int
| Add Expr Expr
| Sub Expr Expr
| Mul Expr Expr
| Div Expr Expr
deriving (Show)

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module Parser.Expression (parseExpr, ParseResult) where
import Control.Monad.Combinators.Expr
import Data.Void (Void)
import Objects.Expression
import Text.Megaparsec as MP
import Text.Megaparsec.Char as C
import Text.Megaparsec.Char.Lexer as L
type Parser = Parsec Void String
lexemeParser :: Parser a -> Parser a
lexemeParser = L.lexeme C.space
symbolParser :: String -> Parser String
symbolParser = L.symbol C.space
intParser :: Parser Int
intParser = lexemeParser L.decimal
term :: Parser Expr
term = Lit <$> intParser
table :: [[Operator Parser Expr]]
table =
[ [ binaryOp "*" Mul,
binaryOp "/" Div
],
[ binaryOp "+" Add,
binaryOp "-" Sub
]
]
binaryOp name f = InfixL (f <$ symbolParser name)
expr :: Parser Expr
expr = makeExprParser term table
type ParseResult = Either (ParseErrorBundle String Void) Expr
parseExpr :: String -> ParseResult
parseExpr = MP.parse (C.space *> expr <* eof) ""
-- parseE = parseExpr

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cabal-version: 2.4
name: really-bad-compiler-in-haskell
version: 0.1.0.0
-- A short (one-line) description of the package.
-- synopsis:
-- A longer description of the package.
-- description:
-- A URL where users can report bugs.
-- bug-reports:
-- The license under which the package is released.
-- license:
author: sudoer777
maintainer: git@sudoer.ch
-- A copyright notice.
-- copyright:
-- category:
extra-source-files:
CHANGELOG.md
README.md
executable really-bad-compiler-in-haskell
main-is: Main.hs
-- Modules included in this executable, other than Main.
-- other-modules:
-- LANGUAGE extensions used by modules in this package.
-- other-extensions:
build-depends: base ^>=4.16.4.0
, megaparsec >= 9.2.2
, parser-combinators
, text
hs-source-dirs: app
default-language: Haskell2010

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# This file was automatically generated by 'stack init'
#
# Some commonly used options have been documented as comments in this file.
# For advanced use and comprehensive documentation of the format, please see:
# https://docs.haskellstack.org/en/stable/yaml_configuration/
# Resolver to choose a 'specific' stackage snapshot or a compiler version.
# A snapshot resolver dictates the compiler version and the set of packages
# to be used for project dependencies. For example:
#
# resolver: lts-3.5
# resolver: nightly-2015-09-21
# resolver: ghc-7.10.2
#
# The location of a snapshot can be provided as a file or url. Stack assumes
# a snapshot provided as a file might change, whereas a url resource does not.
#
# resolver: ./custom-snapshot.yaml
# resolver: https://example.com/snapshots/2018-01-01.yaml
resolver:
url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/20/26.yaml
# User packages to be built.
# Various formats can be used as shown in the example below.
#
# packages:
# - some-directory
# - https://example.com/foo/bar/baz-0.0.2.tar.gz
# subdirs:
# - auto-update
# - wai
packages:
- .
# Dependency packages to be pulled from upstream that are not in the resolver.
# These entries can reference officially published versions as well as
# forks / in-progress versions pinned to a git hash. For example:
#
# extra-deps:
# - acme-missiles-0.3
# - git: https://github.com/commercialhaskell/stack.git
# commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
#
# extra-deps: []
# Override default flag values for local packages and extra-deps
# flags: {}
# Extra package databases containing global packages
# extra-package-dbs: []
# Control whether we use the GHC we find on the path
# system-ghc: true
#
# Require a specific version of Stack, using version ranges
# require-stack-version: -any # Default
# require-stack-version: ">=2.9"
#
# Override the architecture used by Stack, especially useful on Windows
# arch: i386
# arch: x86_64
#
# Extra directories used by Stack for building
# extra-include-dirs: [/path/to/dir]
# extra-lib-dirs: [/path/to/dir]
#
# Allow a newer minor version of GHC than the snapshot specifies
# compiler-check: newer-minor

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# This file was autogenerated by Stack.
# You should not edit this file by hand.
# For more information, please see the documentation at:
# https://docs.haskellstack.org/en/stable/lock_files
packages: []
snapshots:
- completed:
sha256: 5a59b2a405b3aba3c00188453be172b85893cab8ebc352b1ef58b0eae5d248a2
size: 650475
url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/20/26.yaml
original:
url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/20/26.yaml