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Replace memset with constexpr fill_n in bigint::align (#4471)

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Use fill_n in place of memset in bigint::align to respect constexpr.
This commit is contained in:
Tomek-Stolarczyk
2025-06-23 19:18:16 -04:00
committed by GitHub
parent 571c02d475
commit 953cffa701
1 changed files with 3 additions and 1 deletions
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4
include/fmt/format.h
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@ -554,6 +554,8 @@ FMT_CONSTEXPR auto fill_n(OutputIt out, Size count, const T& value)
template <typename T, typename Size> template <typename T, typename Size>
FMT_CONSTEXPR20 auto fill_n(T* out, Size count, char value) -> T* { FMT_CONSTEXPR20 auto fill_n(T* out, Size count, char value) -> T* {
if (is_constant_evaluated()) return fill_n<T*, Size, T>(out, count, value); if (is_constant_evaluated()) return fill_n<T*, Size, T>(out, count, value);
static_assert(sizeof(T) == 1,
"sizeof(T) must be 1 to use char for initialization");
std::memset(out, value, to_unsigned(count)); std::memset(out, value, to_unsigned(count));
return out + count; return out + count;
} }
@ -2782,7 +2784,7 @@ class bigint {
bigits_.resize(to_unsigned(num_bigits + exp_difference)); bigits_.resize(to_unsigned(num_bigits + exp_difference));
for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j) for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j)
bigits_[j] = bigits_[i]; bigits_[j] = bigits_[i];
memset(bigits_.data(), 0, to_unsigned(exp_difference) * sizeof(bigit)); fill_n(bigits_.data(), to_unsigned(exp_difference), 0U);
exp_ -= exp_difference; exp_ -= exp_difference;
} }