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plugins: fix compile warning with some gcc versions and -Og

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Indeed, we can fall through this if it's not a valid enum value.

gcc-12 (Ubuntu 12.2.0-17ubuntu1) 12.2.0

```
In file included from plugins/commando.c:10:
ccan/ccan/tal/str/str.h: In function ‘rune_altern_to_english’:
ccan/ccan/tal/str/str.h:43:9: error: ‘cond_str’ may be used uninitialized [-Werror=maybe-uninitialized]
   43 |         tal_fmt_(ctx, TAL_LABEL(char, "[]"), __VA_ARGS__)
      |         ^~~~~~~~
plugins/commando.c:97:21: note: ‘cond_str’ was declared here
   97 |         const char *cond_str;
      |                     ^~~~~~~~
cc1: all warnings being treated as errors
```

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2023-08-14 17:09:47 +09:30
parent 028dcb875b
commit 9239278cdd
1 changed files with 18 additions and 20 deletions
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38
lightningd/runes.c
View file

@ -193,43 +193,41 @@ static bool is_unique_id(struct rune_restr **restrs, unsigned int index)
return streq(restrs[index]->alterns[0]->fieldname, "");
}
static char *fmt_cond(const tal_t *ctx,
const struct rune_altern *alt,
const char *cond_str)
{
return tal_fmt(ctx, "%s %s %s", alt->fieldname, cond_str, alt->value);
}
static char *rune_altern_to_english(const tal_t *ctx, const struct rune_altern *alt)
{
const char *cond_str;
switch (alt->condition) {
case RUNE_COND_IF_MISSING:
return tal_strcat(ctx, alt->fieldname, " is missing");
case RUNE_COND_EQUAL:
cond_str = "equal to";
break;
return fmt_cond(ctx, alt, "equal to");
case RUNE_COND_NOT_EQUAL:
cond_str = "unequal to";
break;
return fmt_cond(ctx, alt, "unequal to");
case RUNE_COND_BEGINS:
cond_str = "starts with";
break;
return fmt_cond(ctx, alt, "starts with");
case RUNE_COND_ENDS:
cond_str = "ends with";
break;
return fmt_cond(ctx, alt, "ends with");
case RUNE_COND_CONTAINS:
cond_str = "contains";
break;
return fmt_cond(ctx, alt, "contains");
case RUNE_COND_INT_LESS:
cond_str = "<";
break;
return fmt_cond(ctx, alt, "<");
case RUNE_COND_INT_GREATER:
cond_str = ">";
break;
return fmt_cond(ctx, alt, ">");
case RUNE_COND_LEXO_BEFORE:
cond_str = "sorts before";
break;
return fmt_cond(ctx, alt, "sorts before");
case RUNE_COND_LEXO_AFTER:
cond_str = "sorts after";
break;
return fmt_cond(ctx, alt, "sorts after");
case RUNE_COND_COMMENT:
return tal_fmt(ctx, "comment: %s %s", alt->fieldname, alt->value);
}
return tal_fmt(ctx, "%s %s %s", alt->fieldname, cond_str, alt->value);
abort();
}
static char *json_add_alternative(const tal_t *ctx,