Add // line comments, grouped parentheses, and NODE_NOP

- Parse // comments in parse_statement by consuming tokens until newline
- Add NODE_NOP for no-op statements (comments)
- Support grouped expressions with parentheses in parse_term

projects/comment.j

@@ -0,0 +1,5 @@
+// Esto es un comentario
+println("Hello World!")
+
+// Otro comentario mas
+println(40)

projects/functions.j

@@ -1,2 +1,3 @@
 x = "Hello"
-println(len(x) + 3)
+y = 2 * (4 - 2)
+println(y)

src/frontend/parser.h

@@ -12,8 +12,7 @@ typedef enum {
   NODE_VAR,        // referencia a variable
   NODE_ASSIGN,     // asignacion: x = expr
   NODE_BINOP,      // operacion binaria: a + b
-  NODE_PRINT,      // print(expr)
+  NODE_NOP,        // noop
-  NODE_PRINTLN,
   NODE_IF,         // if cond: bloque
   NODE_WHILE,      // while cond: bloque
   NODE_BLOCK,      // secuencia de statements
@@ -103,13 +102,17 @@ ASTNode *parse_term(Token *tokens) {
       node->data.call.args = args;
       node->data.call.arg_count = arg_count;
       return node;
-
     }
     ASTNode *node = make_node(NODE_VAR);
     node->data.string_val = tokens[pos].value;
     pos++;
     return node;
 
+  } else if (tokens[pos].type == TOK_LPAREN) {
+    pos++; // consumir (
+    ASTNode *expr = parse_expr(tokens);
+    pos++; // consumir )
+    return expr;
   } else if (tokens[pos].type == TOK_MINUS) {
     pos++; // consumir '-'
     ASTNode *term = parse_term(tokens);
@@ -184,6 +187,22 @@ ASTNode *parse_statement(Token *tokens) {
     return node;
   }
 
+  // Parse comments
+  if (tokens[pos].type == TOK_SLASH) {
+    if (tokens[pos + 1].type == TOK_SLASH) {
+      pos++; // consumir /
+      pos++; // consumir /
+
+      // Consumir hasta NewLine
+      while (tokens[pos].type != TOK_NEWLINE)
+        pos++;
+
+      pos++; // consumir newline
+
+      return make_node(NODE_NOP);
+    }
+  }
+
   if (tokens[pos].type == TOK_WHILE) {
     pos++; // consumir while
     ASTNode *cond = parse_expr(tokens);

src/vm/eval.h

@@ -105,17 +105,6 @@ size_t eval(ASTNode *node, Environment *env, void *allocator, int debug,
       return obj_new_int(allocator, l->data.int_val > r->data.int_val);
     }
   }
-  case NODE_PRINT: {
-    size_t val = eval(node->data.print.expr, env, allocator, debug, gc);
-    obj_print(allocator, val, "");
-    return val;
-  }
-  case NODE_PRINTLN: {
-    size_t val = eval(node->data.print.expr, env, allocator, debug, gc);
-    obj_print(allocator, val, "");
-    printf("\n");
-    return val;
-  }
   case NODE_BLOCK:
     // Run GC
     if (gc) {