From 340d408024980bddac83971dbef7d6a17c407382 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roman=20Smr=C5=BE?= <roman.smrz@seznam.cz>
Date: Sun, 19 Jan 2025 20:01:05 +0100
Subject: Export declaration

---
 src/Parser.hs      | 24 +++++++++++++++++++-----
 src/Parser/Core.hs |  3 ++-
 2 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/src/Parser.hs b/src/Parser.hs
index e23b277..00f6f3e 100644
--- a/src/Parser.hs
+++ b/src/Parser.hs
@@ -43,8 +43,8 @@ parseTestDefinition = label "test definition" $ toplevel ToplevelTest $ do
         wsymbol "test"
         lexeme $ TL.toStrict <$> takeWhileP (Just "test name") (/=':')
 
-parseDefinition :: TestParser Toplevel
-parseDefinition = label "symbol definition" $ toplevel ToplevelDefinition $ do
+parseDefinition :: TestParser ( VarName, SomeExpr )
+parseDefinition = label "symbol definition" $ do
     def <- localState $ L.indentBlock scn $ do
         wsymbol "def"
         name <- varName
@@ -94,6 +94,19 @@ parseDefinition = label "symbol definition" $ toplevel ToplevelDefinition $ do
                 replaceArgs (SomeExpr e) = SomeExpr (go unif e)
             e -> e
 
+parseExport :: TestParser [ Toplevel ]
+parseExport = label "export declaration" $ toplevel id $ do
+    wsymbol "export"
+    choice
+      [ do
+        def@( name, _ ) <- parseDefinition
+        return [ ToplevelDefinition def, ToplevelExport name ]
+      , do
+        names <- listOf varName
+        void eol
+        return $ map ToplevelExport names
+      ]
+
 parseTestModule :: FilePath -> TestParser Module
 parseTestModule absPath = do
     moduleName <- choice
@@ -110,9 +123,10 @@ parseTestModule absPath = do
         , do
             return $ [ T.pack $ takeBaseName absPath ]
         ]
-    toplevels <- many $ choice
-        [ parseTestDefinition
-        , parseDefinition
+    toplevels <- fmap concat $ many $ choice
+        [ (: []) <$> parseTestDefinition
+        , (: []) <$> toplevel ToplevelDefinition parseDefinition
+        , parseExport
         ]
     let moduleTests = catMaybes $ map (\case ToplevelTest x -> Just x; _ -> Nothing) toplevels
         moduleDefinitions = catMaybes $ map (\case ToplevelDefinition x -> Just x; _ -> Nothing) toplevels
diff --git a/src/Parser/Core.hs b/src/Parser/Core.hs
index 5fb4c5f..2b8837a 100644
--- a/src/Parser/Core.hs
+++ b/src/Parser/Core.hs
@@ -40,6 +40,7 @@ runTestParser path content initState (TestParser parser) = runIdentity . flip (f
 data Toplevel
     = ToplevelTest Test
     | ToplevelDefinition ( VarName, SomeExpr )
+    | ToplevelExport VarName
 
 data TestParserState = TestParserState
     { testVars :: [ ( VarName, SomeExprType ) ]
@@ -204,7 +205,7 @@ localState inner = do
     put s { testNextTypeVar = testNextTypeVar s', testTypeUnif = testTypeUnif s' }
     return x
 
-toplevel :: (a -> Toplevel) -> TestParser a -> TestParser Toplevel
+toplevel :: (a -> b) -> TestParser a -> TestParser b
 toplevel f = return . f <=< L.nonIndented scn
 
 block :: (a -> [b] -> TestParser c) -> TestParser a -> TestParser b -> TestParser c
-- 
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