.gitignore

@@ -3,3 +3,4 @@ out/
 *.zip
 prg/**/*.ast
 prg/**/*.out
+prg/**/*.pins25

grammar.txt

@@ -39,9 +39,8 @@ restcmp -> EQU addexpr
 		 | .
 
 addexpr -> multexpr restadd .
-restadd -> ADD addexpr
+restadd -> ADD multexpr restadd
-		 | SUB addexpr
+		 | SUB multexpr restadd | .
-		 | .
 
 multexpr -> prefixexpr restmult .
 restmult -> MUL prefixexpr restmult

prg/test.pins25

@@ -1,3 +0,0 @@
-
-fun main() =
-	3 - 2 - 1

src/pins25/phase/SynAn.java

@@ -540,20 +540,20 @@ public class SynAn implements AutoCloseable {
         Token token = lexAn.peekToken();
         switch (token.symbol()) {
             case ADD: {
-                // restadd -> ADD addexpr
+                // restadd -> ADD multexpr restadd
                 check(Token.Symbol.ADD);
-                AST.Expr right = parseAdditionExpression();
+                AST.Expr right = parseMultiplicationExpression();
                 AST.Expr binExpr = new AST.BinExpr(AST.BinExpr.Oper.ADD, left, right);
                 attrLoc.put(binExpr, new Report.Location(attrLoc.get(left), attrLoc.get(right)));
-                return binExpr;
+                return parseRestAdditionExpressions(binExpr);
             }
             case SUB: {
-                // restadd -> ADD addexpr
+                // restadd -> SUB multexpr restadd
                 check(Token.Symbol.SUB);
-                AST.Expr right = parseAdditionExpression();
+                AST.Expr right = parseMultiplicationExpression();
                 AST.Expr binExpr = new AST.BinExpr(AST.BinExpr.Oper.SUB, left, right);
                 attrLoc.put(binExpr, new Report.Location(attrLoc.get(left), attrLoc.get(right)));
-                return binExpr;
+                return parseRestAdditionExpressions(binExpr);
             }
 
             default: