From 079d5f51a63e409f83c5414fd848a90a0b8def62 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Sun, 14 Aug 2022 08:55:12 +0100
Subject: Check arity

---
 src/Compiler.hs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Compiler.hs b/src/Compiler.hs
index d39a184..c373988 100644
--- a/src/Compiler.hs
+++ b/src/Compiler.hs
@@ -54,7 +54,13 @@ compile x = do
     (A.Call ident args pos) -> do
       r <- compile ident
       case r of
-        p@(Right (Just (A.FuncType _ _))) -> return $ p
+        p@(Right (Just (A.FuncType params _))) ->
+          if length args /= length params
+            then do
+              (ev, errs) <- get
+              put (ev, Error ("invalid number of arguments in function call") pos : errs)
+              return $ Right Nothing
+            else return $ p
         Right _ -> do
           (ev, errs) <- get
           put (ev, Error ("non callable value in function call") pos : errs)
-- 
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