Predrok 2025 - Naloga 1

grammar.txt

@@ -39,9 +39,8 @@ restcmp -> EQU addexpr
 		 | .
 
 addexpr -> multexpr restadd .
-restadd -> ADD addexpr
-		 | SUB addexpr
-		 | .
+restadd -> ADD multexpr restadd
+		 | SUB multexpr restadd | .
 
 multexpr -> prefixexpr restmult .
 restmult -> MUL prefixexpr restmult
@@ -71,3 +70,27 @@ initializer -> INTCONST intconstmult | CHARCONST | STRINGCONST .
 intconstmult -> MUL const | .
 
 const -> INTCONST | CHARCONST | STRINGCONST .
+
+
+--------------------------------------------------------------------
+
+//LEFT ASOC.
+exp0 = exp0 op other | other
+
+    |
+    v
+
+exp0  = other exp0'
+exp0' = op other exp0' | .
+
+
+
+
+//RIGHT ASOC.
+exp0 = other op exp0 | other
+
+    |
+    v
+
+exp0  = other exp0'
+exp0' =  op exp0 | .

prg/test.pins25

@@ -1,3 +1,5 @@
+// line1 --
+line2 -----x
+line3
 
-fun main() =
-	3 - 2 - 1
+fun main() = 0

src/pins25/phase/LexAn.java

@@ -247,7 +247,13 @@ public class LexAn implements AutoCloseable {
                     return;
                 }
 
-                while (buffChar != '\n' && buffChar != -1) {
+                StringBuilder builder = new StringBuilder();
+                
+                while (buffChar != -1) {
+                    if (buffChar == '\n' && !builder.toString().endsWith("--")) {
+                        break;
+                    }
+                    builder.append((char) buffChar);
                     nextChar();
                 }
 

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: