wip

progs/test2.py

@@ -1,5 +1 @@
 x = 1
-if x == 1:
-    print("a")
-else:
-    print("b")

src/Main.java

@@ -29,19 +29,34 @@ public static void main(String[] args) {
 
             CharStream cs = CharStreams.fromFileName(fileStr);
             Python3Lexer lexer = new Python3Lexer(cs);
-            CommonTokenStream tokenStream = new CommonTokenStream(lexer);
-            Python3Parser parser = new Python3Parser(tokenStream);
+            CommonTokenStream tokens = new CommonTokenStream(lexer);
+            Python3Parser parser = new Python3Parser(tokens);
             Python3Parser.RootContext tree = parser.root();
 
+            // DEBUG
+            {
+                tokens.fill();
+                for (Token token : tokens.getTokens()) {
+                    System.out.println(token.toString());
+                }
+
+                System.out.println("Tree: " + tree);
+            }
+
+            if (tree == null) {
+                System.err.println("The tree is null.");
+                return;
+            }
+
             if (parser.getNumberOfSyntaxErrors() > 0) {
                 System.err.println("Error on program parsing.");
                 return;
             }
 
             Python3VisitorImpl visitor = new Python3VisitorImpl();
+            SymbolTable ST = new SymbolTable();
             Node ast = visitor.visit(tree);
 
-            SymbolTable ST = new SymbolTable();
             ArrayList<SemanticError> errors = ast.checkSemantics(ST, 0);
             if (errors.size() > 0) {
                 System.out.println("You had: " + errors.size() + " errors:");