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[uart] Fix a maybe uninitialized warning in the fixed size read (#19988)

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J. Nick Koston
2026-10-01 13:35:01 -05:00
committed by GitHub
parent 2de4f4cf81
commit e500ece4d5
1 changed files with 4 additions and 3 deletions
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esphome/components/uart/uart.h
+4 -3
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@@ -37,9 +37,10 @@ class UARTDevice {
bool read_array(uint8_t *data, size_t len) { return this->parent_->read_array(data, len); }
template<size_t N> optional<std::array<uint8_t, N>> read_array() { // NOLINT
std::array<uint8_t, N> res;
if (!this->read_array(res.data(), N)) {
return {};
// One object returned on both paths; a separate empty optional trips GCC's -Wmaybe-uninitialized.
optional<std::array<uint8_t, N>> res(std::in_place);
if (!this->read_array(res->data(), N)) {
res.reset();
}
return res;
}