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

src/frontend/parser.h

@@ -12,11 +12,10 @@ typedef enum {
   NODE_VAR,        // referencia a variable
   NODE_ASSIGN,     // asignacion: x = expr
   NODE_BINOP,      // operacion binaria: a + b
-  NODE_PRINT,      // print(expr)
-  NODE_PRINTLN,
-  NODE_IF,    // if cond: bloque
-  NODE_WHILE, // while cond: bloque
-  NODE_BLOCK, // secuencia de statements
+  NODE_NOP,        // noop
+  NODE_IF,         // if cond: bloque
+  NODE_WHILE,      // while cond: bloque
+  NODE_BLOCK,      // secuencia de statements
   NODE_CALL,
 } NodeType;
 
@@ -79,7 +78,7 @@ ASTNode *parse_term(Token *tokens) {
     pos++;
     return node;
   } else if (tokens[pos].type == TOK_ID) {
-    if (tokens[pos +1].type == TOK_LPAREN) {
+    if (tokens[pos + 1].type == TOK_LPAREN) {
       // Function call
       char *name = tokens[pos].value;
       pos++; // consumir ID
@@ -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);