Attempting to print the expression tree. I think the printing code is fine but the Parser is bugged and not building the tree correctly.

lox.c

@@ -39,7 +39,9 @@ void RunFile(const char* path) {
     TokenList* tokens = ScanTokens(contents);
     free(contents);
     Print(tokens);
+    printf("TREE:\n");
     Expr* tree = GenerateExpressionTree(tokens);
+    PrintExpressionTree(tree);
     FreeExpressionTree(tree);
     DestroyTokenList(tokens);
 }

parser.c

@@ -1,4 +1,6 @@
 #include "parser.h"
+#include "expr.h"
+#include <stdio.h>
 
 Expr* Expression(void);
 Expr* Equality(void);
@@ -135,9 +137,9 @@ Expr* Primary() {
     if (Match(1, LParen)) {
         free(expr);
         expr = Expression();
+        if (!Check(RParen)) printf("Unbalcnace\n");
         //Consume(RParen, "Expect ')' after expression.");
         expr->type = GROUPING;
-        return expr;
     }
 
     return expr;
@@ -181,7 +183,25 @@ Token* AdvanceParser() {
 }
 
 void PrintExpressionTree(const Expr* tree) {
-
+    if (!tree) return;
+    
+    if (tree->type == BINARY) {
+        printf("(");
+        PrintExpressionTree(tree->expression.Binary.left);
+        PrintExpressionTree(tree->expression.Binary.right);
+        printf("%s", tree->expression.Binary.op->lexeme);
+        printf(")\n");
+    }
+    else if (tree->type == UNARY) {
+        printf("(");
+        printf("%s", tree->expression.Unary.op->lexeme);
+        PrintExpressionTree(tree->expression.Unary.right);
+        printf(")\n");
+    }
+    else if (tree->type == GROUPING) {
+        PrintExpressionTree(tree->expression.Grouping.expression);
+    }
+    else if (tree->type == LITERAL) printf("%s", tree->expression.Literal.type->lexeme);
 }
 
 void FreeExpressionTree(Expr* tree) {