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common: Make use of [[nodiscard]] where applicable

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Now that clang-format makes [[nodiscard]] attributes format sensibly, we
can apply them to several functions within the common library to allow
the compiler to complain about any misuses of the functions.
This commit is contained in:
Lioncash
2020-08-14 09:38:45 -04:00
parent 2b601e8636
commit df72480395
34 changed files with 343 additions and 358 deletions
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14
src/common/alignment.h
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@ -9,7 +9,7 @@
namespace Common {
template <typename T>
constexpr T AlignUp(T value, std::size_t size) {
[[nodiscard]] constexpr T AlignUp(T value, std::size_t size) {
static_assert(std::is_unsigned_v<T>, "T must be an unsigned value.");
auto mod{static_cast<T>(value % size)};
value -= mod;
@ -17,31 +17,31 @@ constexpr T AlignUp(T value, std::size_t size) {
}
template <typename T>
constexpr T AlignDown(T value, std::size_t size) {
[[nodiscard]] constexpr T AlignDown(T value, std::size_t size) {
static_assert(std::is_unsigned_v<T>, "T must be an unsigned value.");
return static_cast<T>(value - value % size);
}
template <typename T>
constexpr T AlignBits(T value, std::size_t align) {
[[nodiscard]] constexpr T AlignBits(T value, std::size_t align) {
static_assert(std::is_unsigned_v<T>, "T must be an unsigned value.");
return static_cast<T>((value + ((1ULL << align) - 1)) >> align << align);
}
template <typename T>
constexpr bool Is4KBAligned(T value) {
[[nodiscard]] constexpr bool Is4KBAligned(T value) {
static_assert(std::is_unsigned_v<T>, "T must be an unsigned value.");
return (value & 0xFFF) == 0;
}
template <typename T>
constexpr bool IsWordAligned(T value) {
[[nodiscard]] constexpr bool IsWordAligned(T value) {
static_assert(std::is_unsigned_v<T>, "T must be an unsigned value.");
return (value & 0b11) == 0;
}
template <typename T>
constexpr bool IsAligned(T value, std::size_t alignment) {
[[nodiscard]] constexpr bool IsAligned(T value, std::size_t alignment) {
using U = typename std::make_unsigned<T>::type;
const U mask = static_cast<U>(alignment - 1);
return (value & mask) == 0;
@ -64,7 +64,7 @@ public:
template <typename T2>
constexpr AlignmentAllocator(const AlignmentAllocator<T2, Align>&) noexcept {}
T* allocate(size_type n) {
[[nodiscard]] T* allocate(size_type n) {
return static_cast<T*>(::operator new (n * sizeof(T), std::align_val_t{Align}));
}