From eaa183b7dfc841df75d42ace7a90ada1e40ff282 Mon Sep 17 00:00:00 2001
From: Rose Hogenson <rosehogenson@posteo.net>
Date: Tue, 4 Nov 2025 18:58:28 -0800
Subject: Add lists

---
 Parser.sml | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

(limited to 'Parser.sml')

diff --git a/Parser.sml b/Parser.sml
index 8f43352..9f31f8d 100644
--- a/Parser.sml
+++ b/Parser.sml
@@ -28,8 +28,18 @@ struct
     , "signature", "struct", "structure", "where", ":>"
     ]
 
-  val emptyInfixOperators : infixTable =
-    Vector.tabulate (10, fn _ => ([], []))
+  val defaultInfixOperators : infixTable = Vector.fromList
+    [ ([], [])
+    , ([], [])
+    , ([], [])
+    , ([], [])
+    , ([], [])
+    , ([], ["::"])
+    , ([], [])
+    , ([], [])
+    , ([], [])
+    , ([], [])
+    ]
 
   fun printSourceLoc ({file, row, column} : sourceLoc) : string =
     file ^ ":" ^ Int.toString row ^ "." ^ Int.toString column
@@ -69,7 +79,7 @@ struct
   fun newState (fileName : string) (fileStream : TextIO.instream) : state = {
     stream = TextIO.getInstream fileStream,
     loc = newLoc fileName,
-    userState = {infixTable = emptyInfixOperators}
+    userState = {infixTable = defaultInfixOperators}
   }
 
   fun updateUserState (f : userState -> userState) : userState parser =
@@ -414,6 +424,10 @@ struct
   val rec atpat : Syntax.pat parser = fn st =>
       (Syntax.PWild <$ reserved "_"
   <|> Syntax.PInt <$> integer
+  <|> (symbol "[" >>
+      bind (sepBy pat (symbol ",")) (fn pats =>
+      symbol "]" >>
+      const (Syntax.PList pats)))
   <|> bind (between (symbol "(") (symbol ")") (sepBy pat (symbol ","))) (fn pats =>
       const
         (case pats of
@@ -476,6 +490,10 @@ struct
            bind expr (fn e =>
            reserved "end" >>
            const (Syntax.ELet (List.mapPartial (fn x => x) decs, e)))))
+      <|> (symbol "[" >>
+          bind (sepBy expr (symbol ",")) (fn exprs =>
+          symbol "]" >>
+          const (Syntax.EList exprs)))
       <|> (symbol "(" >>
            bind (sepBy expr (symbol ",")) (fn exprs =>
            symbol ")" >>
-- 
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