From bcef4a4789f439934a40709189c1ae9e036cf1d2 Mon Sep 17 00:00:00 2001
From: Brad Richardson <everythingfunctional@protonmail.com>
Date: Wed, 21 Oct 2020 10:06:11 -0500
Subject: Make module subprogram declaration detection more explicit/restricted

---
 bootstrap/src/BuildModel.hs | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/bootstrap/src/BuildModel.hs b/bootstrap/src/BuildModel.hs
index 8f4d813..6dc8ddf 100644
--- a/bootstrap/src/BuildModel.hs
+++ b/bootstrap/src/BuildModel.hs
@@ -308,14 +308,24 @@ useStatement = do
 
 moduleSubprogramDeclaration :: ReadP LineContents
 moduleSubprogramDeclaration = do
-  skipAnything
+  skipSpaces
+  skipProcedureQualifiers
   _ <- string "module"
   skipAtLeastOneWhiteSpace
-  skipAnything
   _ <- string "function" <|> string "subroutine"
   skipAtLeastOneWhiteSpace
   return $ ModuleSubprogramDeclaration
 
+skipProcedureQualifiers :: ReadP ()
+skipProcedureQualifiers = do
+  many skipPossibleQualifier
+  return ()
+
+skipPossibleQualifier :: ReadP ()
+skipPossibleQualifier = do
+  _ <- string "pure" <|> string "elemental" <|> string "impure"
+  skipAtLeastOneWhiteSpace
+
 skipAtLeastOneWhiteSpace :: ReadP ()
 skipAtLeastOneWhiteSpace = do
   _ <- many1 whiteSpace
-- 
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