Permalink
Browse files

fix clang -Wtautological-compare with unsigned enum

Create a GREP_HEADER_FIELD_MIN so we can check that the field value is
sane and silence the clang warning.

Clang warning happens because the enum is unsigned (this is
implementation-defined, and there is no negative fields) and the check
is then tautological.

Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
Signed-off-by: John Keeping <john@keeping.me.uk>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
  • Loading branch information...
1 parent 5ded807 commit 3ce3ffb840a1dfa7fcbafa9309fab37478605d08 @apelisse apelisse committed with gitster Feb 3, 2013
Showing with 4 additions and 2 deletions.
  1. +2 −1 grep.c
  2. +2 −1 grep.h
View
3 grep.c
@@ -625,7 +625,8 @@ static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
for (p = opt->header_list; p; p = p->next) {
if (p->token != GREP_PATTERN_HEAD)
die("bug: a non-header pattern in grep header list.");
- if (p->field < 0 || GREP_HEADER_FIELD_MAX <= p->field)
+ if (p->field < GREP_HEADER_FIELD_MIN ||
+ GREP_HEADER_FIELD_MAX <= p->field)
die("bug: unknown header field %d", p->field);
compile_regexp(p, opt);
}
View
3 grep.h
@@ -28,7 +28,8 @@ enum grep_context {
};
enum grep_header_field {
- GREP_HEADER_AUTHOR = 0,
+ GREP_HEADER_FIELD_MIN = 0,
+ GREP_HEADER_AUTHOR = GREP_HEADER_FIELD_MIN,
GREP_HEADER_COMMITTER,
GREP_HEADER_REFLOG,

0 comments on commit 3ce3ffb

Please sign in to comment.