Call codegen and write LLVM output to output file

Fix prettyprinter version conflict

.gitignore

@@ -21,3 +21,7 @@ cabal.project.local
 cabal.project.local~
 .HTF/
 .ghc.environment.*
+
+# Windows12 output files
+*.ll
+*.s

cabal.project

@@ -0,0 +1,7 @@
+-- Needed to get a working version of llvm-hs-pretty
+-- The one on hackage is broken with this version of GHC
+source-repository-package
+    type: git
+    location: https://github.com/rumkeller/llvm-hs-pretty.git
+
+packages: ./windows12.cabal

src/Main.hs

@@ -3,13 +3,27 @@
 module Main where
 
 import qualified Data.Text.IO as T
-import Prettyprinter
+import qualified Data.Text.Lazy.IO as TL
+import Data.Text.Lazy (toStrict, unpack)
+import Data.String.Conversions (cs)
+import Data.Text.Prettyprint.Doc (pretty)
 import Text.Megaparsec (parse)
 import Windows12.Parser (programP)
+import System.Environment (getArgs)
+import LLVM.Pretty
+import Windows12.Ast
+import Windows12.CodeGen (codegen)
+
 
 main :: IO ()
 main = do
-  test <- T.readFile "test/hello.w12"
-  case parse programP "test/hello.w12" test of
-    Left err -> print err
-    Right ast -> print (pretty ast)
+  args <- getArgs
+
+  if length args /= 2
+    then putStrLn "Usage: windows12 <input file> <output file>"
+    else do
+      let [inputFile, outputFile] = args
+      test <- T.readFile inputFile
+      case parse programP inputFile test of
+        Left err -> print err
+        Right ast -> TL.writeFile outputFile (ppllvm (codegen (cs inputFile) ast))

src/Windows12.hs

@@ -2,4 +2,5 @@ module Windows12 where
 
 import Windows12.Ast
 import Windows12.Lexer
-import Windows12.Parser
+import Windows12.Parser
+import Windows12.CodeGen

src/Windows12/Ast.hs

@@ -3,7 +3,7 @@
 module Windows12.Ast where
 
 import Data.Text (Text)
-import Prettyprinter
+import Data.Text.Prettyprint.Doc
 
 data BinOp
   = Add

src/Windows12/CodeGen.hs

@@ -0,0 +1,8 @@
+module Windows12.CodeGen where
+
+import Data.Text (Text)
+import Windows12.Ast
+import LLVM.AST (Module)
+
+codegen :: Text -> Program -> Module
+codegen filename (Program structs enums funcs) = undefined

windows12.cabal

@@ -68,6 +68,7 @@ executable windows12
         Windows12.Ast
         Windows12.Lexer
         Windows12.Parser
+        Windows12.CodeGen
 
     -- LANGUAGE extensions used by modules in this package.
     -- other-extensions:
@@ -76,10 +77,12 @@ executable windows12
     build-depends:
         base >= 4.15.1 && < 4.16,
         llvm-hs-pure >= 9.0.0 && < 9.1,
+        llvm-hs-pretty >= 0.9.0 && < 0.10,
         megaparsec >= 9.6.1 && < 9.7,
         text >= 1.2.5 && < 1.3,
         parser-combinators >= 1.3.0 && < 1.4,
-        prettyprinter >= 1.7.1 && < 1.8,
+        prettyprinter >= 1.5.1 && < 1.6,
+        string-conversions >= 0.4.0 && < 0.5
 
     -- Directories containing source files.
     hs-source-dirs:   src