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maint: use static_assert

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* gnulib.modules: Add assert-h, for static_assert.
* src/common.h, src/list.c, src/misc.c:
Prefer static_assert to #if + #error.  This doesn’t fix any bugs; it’s
just that in general it’s better to avoid the preprocessor.
This commit is contained in:
Paul Eggert
2024-08-04 01:41:43 -07:00
parent dcc90722ac
commit c6a5af16ba
4 changed files with 14 additions and 17 deletions
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src/misc.c
+4 -6
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@@ -377,13 +377,12 @@ replace_prefix (char **pname, const char *samp, size_t slen,
converted string. If VALUE is converted from a negative integer in
the range MINVAL .. -1, represent it with a string representation
of the negative integer, using leading '-'. */
#if ! (INTMAX_MAX <= UINTMAX_MAX / 2)
# error "sysinttostr: uintmax_t cannot represent all intmax_t values"
#endif
char *
sysinttostr (uintmax_t value, intmax_t minval, uintmax_t maxval,
char buf[SYSINT_BUFSIZE])
{
static_assert (INTMAX_MAX <= UINTMAX_MAX / 2);
if (value <= maxval)
return umaxtostr (value, buf);
else
@@ -406,12 +405,11 @@ sysinttostr (uintmax_t value, intmax_t minval, uintmax_t maxval,
On a normal return, set errno = 0.
On conversion error, return 0 and set errno = EINVAL.
On overflow, return an extreme value and set errno = ERANGE. */
#if ! (INTMAX_MAX <= UINTMAX_MAX)
# error "strtosysint: nonnegative intmax_t does not fit in uintmax_t"
#endif
intmax_t
strtosysint (char const *arg, char **arglim, intmax_t minval, uintmax_t maxval)
{
static_assert (INTMAX_MAX <= UINTMAX_MAX);
errno = 0;
if (maxval <= INTMAX_MAX)
{