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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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19
src/common/bit_field.h
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@ -36,13 +36,6 @@
#include "common/common_funcs.h"
#include "common/swap.h"
// Inlining
#ifdef _WIN32
#define FORCE_INLINE __forceinline
#else
#define FORCE_INLINE inline __attribute__((always_inline))
#endif
/*
* Abstract bitfield class
*
@ -142,8 +135,8 @@ public:
* containing several bitfields can be assembled by formatting each of their values and ORing
* the results together.
*/
static constexpr FORCE_INLINE StorageType FormatValue(const T& value) {
return ((StorageType)value << position) & mask;
[[nodiscard]] static constexpr StorageType FormatValue(const T& value) {
return (static_cast<StorageType>(value) << position) & mask;
}
/**
@ -151,7 +144,7 @@ public:
* (such as Value() or operator T), but this can be used to extract a value from a bitfield
* union in a constexpr context.
*/
static constexpr FORCE_INLINE T ExtractValue(const StorageType& storage) {
[[nodiscard]] static constexpr T ExtractValue(const StorageType& storage) {
if constexpr (std::numeric_limits<UnderlyingType>::is_signed) {
std::size_t shift = 8 * sizeof(T) - bits;
return static_cast<T>(static_cast<UnderlyingType>(storage << (shift - position)) >>
@ -175,7 +168,7 @@ public:
constexpr BitField(BitField&&) noexcept = default;
constexpr BitField& operator=(BitField&&) noexcept = default;
constexpr operator T() const {
[[nodiscard]] constexpr operator T() const {
return Value();
}
@ -183,11 +176,11 @@ public:
storage = static_cast<StorageType>((storage & ~mask) | FormatValue(value));
}
constexpr T Value() const {
[[nodiscard]] constexpr T Value() const {
return ExtractValue(storage);
}
constexpr explicit operator bool() const {
[[nodiscard]] constexpr explicit operator bool() const {
return Value() != 0;
}