[PATCH olang] parser: abort when parser identifies a syntax error

[PATCH olang] parser: abort when parser identifies a syntax error

[Johnny Richard]

The current implementation fails with segfault when the parser finds a
syntax error.  We are not prepared to recover from errors at this
moment.

This patch aborts when found an expected token and it also improves the
error output by showing the wrong token string value.

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
---
Let's postpone syntax error recovery.  I want to keep things simple
right now.

 src/parser.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/parser.c b/src/parser.c
index a9699be..cfea9ef 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -173,18 +173,18 @@ expected_token(parser_t *parser, token_t *token, token_kind_t expected_kind)
 
     if (token->kind != expected_kind) {
         fprintf(stderr,
-                "%s:%lu:%lu: error: got <%s> token but expect <%s>\n",
+                "%s:%lu:%lu: error: got '"SV_FMT"' token but expect <%s>\n",
                 parser->file_path,
                 token->location.row + 1,
                 (token->location.offset - token->location.bol) + 1,
-                token_kind_to_cstr(token->kind),
+                SV_ARG(token->value),
                 token_kind_to_cstr(expected_kind));
 
         string_view_t line = lexer_get_token_line(parser->lexer, token);
         fprintf(stderr, "" SV_FMT "\n", SV_ARG(line));
         fprintf(stderr, "%*s\n", (int)(token->location.offset - token->location.bol + 1), "^");
 
-        return false;
+        exit(EXIT_FAILURE);
     }
     return true;
 }

base-commit: 35f594370443a2b9f73d2d2ebe573b4cab472be6
-- 
2.44.0

[olang/patches/.build.yml] build failed

[builds.sr.ht]

olang/patches/.build.yml: FAILED in 30s

[parser: abort when parser identifies a syntax error][0] from [Johnny Richard][1]

[0]: https://lists.sr.ht/~johnnyrichard/olang-devel/patches/50088
[1]: mailto:johnny@johnnyrichard.com

✗ #1164684 FAILED olang/patches/.build.yml https://builds.sr.ht/~johnnyrichard/job/1164684

Re: [PATCH olang] parser: abort when parser identifies a syntax error

[Johnny Richard]

Ops... the lint failing again...

Please consider the following fixup:

-------->8--------
Subject: [PATCH olang] fixup! parser: abort when parser identifies a syntax
 error


diff --git a/src/parser.c b/src/parser.c
index cfea9ef..3316e07 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -173,7 +173,7 @@ expected_token(parser_t *parser, token_t *token, token_kind_t expected_kind)
 
     if (token->kind != expected_kind) {
         fprintf(stderr,
-                "%s:%lu:%lu: error: got '"SV_FMT"' token but expect <%s>\n",
+                "%s:%lu:%lu: error: got '" SV_FMT "' token but expect <%s>\n",
                 parser->file_path,
                 token->location.row + 1,
                 (token->location.offset - token->location.bol) + 1,

Re: [PATCH olang] parser: abort when parser identifies a syntax error

[Carlos Maniero]

The patch was applied. Thanks.

To git.sr.ht:~johnnyrichard/olang
   35f5943..4684a78  main -> main