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, 1 insertions, 0 deletions

diff --git a/src/lexer.h b/src/lexer.h
index f5333a0..472ee10 100644
--- a/src/lexer.h
+++ b/src/lexer.h
@@ -36,6 +36,7 @@ typedef enum {
 typedef struct token_t {
   token_kind_t  kind;
   char         *value;
+  char         *filepath;
   uint32_t      row;
   uint32_t      col;
 } token_t;