checkout: implement "@{-N}" shortcut name for N-th last branch

diff --git a/cache.h b/cache.h
index 8e1af2669bd2e9af03a73b7058bec014d4d3a3aa..0dd9168be58be2147edeb5ca81dca6dd7abd8f05 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -663,6 +663,7 @@ extern int read_ref(const char *filename, unsigned char *sha1);
 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
+extern int interpret_nth_last_branch(const char *str, struct strbuf *);
 
 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 extern const char *ref_rev_parse_rules[];