parser: Show filepath row and col when parsing fails

In order to find out where a parsing error occurred, this patch
introduces the exactly location following the format 'file:row:col'.

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>

1 files changed, 12 insertions, 2 deletions

diff --git a/src/parser.c b/src/parser.c
index 5d2a734..4867201 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -38,12 +38,22 @@ expected_token(parser_t *parser, token_kind_t kind)
   lexer_next_token(parser->lexer, &token);
 
   if (token.kind == TOKEN_EOF) {
-    fprintf(stderr, "[ERROR]: expected '%s' but got end of file\n", token_kind_to_str(kind));
+    fprintf(
+        stderr,
+        "%s:%d:%d: [ERROR]: expected '%s' but got end of file\n",
+        token.filepath, token.row + 1, token.col + 1,
+        token_kind_to_str(kind)
+    );
     exit(EXIT_FAILURE);
   }
 
   if (token.kind != kind) {
-    fprintf(stderr, "[ERROR]: expected '%s' but got '%s'\n", token_kind_to_str(kind), token_kind_to_str(token.kind));
+    fprintf(
+        stderr,
+        "%s:%d:%d: [ERROR]: expected '%s' but got '%s'\n",
+        token.filepath, token.row + 1, token.col + 1,
+        token_kind_to_str(kind), token_kind_to_str(token.kind)
+    );
     exit(EXIT_FAILURE);
   }