parser: Stop exiting on parser error

Previously, when an error occurred during parsing, the application
would exit, making it difficult to test the parser and limiting the
compiler's extensibility. This commit improves the parser's error
handling by allowing for continued execution after an error, enabling
easier testing and increased flexibility.

The parser is prepared to handle multiples errors, although the
current implementation always returns a single error, it may be
useful given multiples functions where we can show errors by context.

Signed-off-by: Carlos Maniero <carlosmaniero@gmail.com>
Reviwed-by: Johnny Richard <johnny@johnnyrichard.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/src/parser.h b/src/parser.h
index 988006e..5f73ff3 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -21,13 +21,20 @@
 #include "lexer.h"
 #include "string_view.h"
 
+typedef struct parser_error_t {
+  token_t token;
+  char message [256];
+} parser_error_t;
+
 typedef struct parser_t {
   lexer_t *lexer;
+  int errors_len;
+  parser_error_t errors[1];
 } parser_t;
 
 void parser_init(parser_t *parser, lexer_t *lexer);
 
-void parser_parse_function_declaration(parser_t *parser, ast_node_t *node);
+bool parser_parse_function_declaration(parser_t *parser, ast_node_t *node);
 
 #endif /* PARSER_H */