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chromium/chromium-65.0.3325.146-Use-affirmative-expression-in-base-Optional.patch
Tom Callaway 4e6c6ef24d 65.0.3325.162
2018-03-15 12:17:21 -04:00

266 lines
8.6 KiB
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diff -up chromium-65.0.3325.146/base/optional.h.affirmative chromium-65.0.3325.146/base/optional.h
--- chromium-65.0.3325.146/base/optional.h.affirmative 2018-03-13 22:27:29.451969704 -0400
+++ chromium-65.0.3325.146/base/optional.h 2018-03-13 22:27:57.031436045 -0400
@@ -41,7 +41,7 @@ struct OptionalStorageBase {
template <class... Args>
constexpr explicit OptionalStorageBase(in_place_t, Args&&... args)
- : is_null_(false), value_(std::forward<Args>(args)...) {}
+ : is_populated_(true), value_(std::forward<Args>(args)...) {}
// When T is not trivially destructible we must call its
// destructor before deallocating its memory.
@@ -55,18 +55,18 @@ struct OptionalStorageBase {
// necessary for this case at the moment. Please see also the destructor
// comment in "is_trivially_destructible = true" specialization below.
~OptionalStorageBase() {
- if (!is_null_)
+ if (is_populated_)
value_.~T();
}
template <class... Args>
void Init(Args&&... args) {
- DCHECK(is_null_);
+ DCHECK(!is_populated_);
::new (&value_) T(std::forward<Args>(args)...);
- is_null_ = false;
+ is_populated_ = true;
}
- bool is_null_ = true;
+ bool is_populated_ = false;
union {
// |empty_| exists so that the union will always be initialized, even when
// it doesn't contain a value. Union members must be initialized for the
@@ -84,7 +84,7 @@ struct OptionalStorageBase<T, true /* tr
template <class... Args>
constexpr explicit OptionalStorageBase(in_place_t, Args&&... args)
- : is_null_(false), value_(std::forward<Args>(args)...) {}
+ : is_populated_(true), value_(std::forward<Args>(args)...) {}
// When T is trivially destructible (i.e. its destructor does nothing) there
// is no need to call it. Implicitly defined destructor is trivial, because
@@ -102,12 +102,12 @@ struct OptionalStorageBase<T, true /* tr
template <class... Args>
void Init(Args&&... args) {
- DCHECK(is_null_);
+ DCHECK(!is_populated_);
::new (&value_) T(std::forward<Args>(args)...);
- is_null_ = false;
+ is_populated_ = true;
}
- bool is_null_ = true;
+ bool is_populated_ = false;
union {
// |empty_| exists so that the union will always be initialized, even when
// it doesn't contain a value. Union members must be initialized for the
@@ -133,7 +133,7 @@ struct OptionalStorage : OptionalStorage
// Accessing the members of template base class requires explicit
// declaration.
- using OptionalStorageBase<T>::is_null_;
+ using OptionalStorageBase<T>::is_populated_;
using OptionalStorageBase<T>::value_;
using OptionalStorageBase<T>::Init;
@@ -145,12 +145,12 @@ struct OptionalStorage : OptionalStorage
OptionalStorage() = default;
OptionalStorage(const OptionalStorage& other) {
- if (!other.is_null_)
+ if (other.is_populated_)
Init(other.value_);
}
OptionalStorage(OptionalStorage&& other) {
- if (!other.is_null_)
+ if (other.is_populated_)
Init(std::move(other.value_));
}
};
@@ -160,7 +160,7 @@ struct OptionalStorage<T,
true /* trivially copy constructible */,
false /* trivially move constructible */>
: OptionalStorageBase<T> {
- using OptionalStorageBase<T>::is_null_;
+ using OptionalStorageBase<T>::is_populated_;
using OptionalStorageBase<T>::value_;
using OptionalStorageBase<T>::Init;
using OptionalStorageBase<T>::OptionalStorageBase;
@@ -169,7 +169,7 @@ struct OptionalStorage<T,
OptionalStorage(const OptionalStorage& other) = default;
OptionalStorage(OptionalStorage&& other) {
- if (!other.is_null_)
+ if (other.is_populated_)
Init(std::move(other.value_));
}
};
@@ -179,7 +179,7 @@ struct OptionalStorage<T,
false /* trivially copy constructible */,
true /* trivially move constructible */>
: OptionalStorageBase<T> {
- using OptionalStorageBase<T>::is_null_;
+ using OptionalStorageBase<T>::is_populated_;
using OptionalStorageBase<T>::value_;
using OptionalStorageBase<T>::Init;
using OptionalStorageBase<T>::OptionalStorageBase;
@@ -188,7 +188,7 @@ struct OptionalStorage<T,
OptionalStorage(OptionalStorage&& other) = default;
OptionalStorage(const OptionalStorage& other) {
- if (!other.is_null_)
+ if (other.is_populated_)
Init(other.value_);
}
};
@@ -223,7 +223,7 @@ class OptionalBase {
~OptionalBase() = default;
OptionalBase& operator=(const OptionalBase& other) {
- if (other.storage_.is_null_) {
+ if (!other.storage_.is_populated_) {
FreeIfNeeded();
return *this;
}
@@ -233,7 +233,7 @@ class OptionalBase {
}
OptionalBase& operator=(OptionalBase&& other) {
- if (other.storage_.is_null_) {
+ if (!other.storage_.is_populated_) {
FreeIfNeeded();
return *this;
}
@@ -243,24 +243,24 @@ class OptionalBase {
}
void InitOrAssign(const T& value) {
- if (storage_.is_null_)
+ if (!storage_.is_populated_)
storage_.Init(value);
else
storage_.value_ = value;
}
void InitOrAssign(T&& value) {
- if (storage_.is_null_)
+ if (!storage_.is_populated_)
storage_.Init(std::move(value));
else
storage_.value_ = std::move(value);
}
void FreeIfNeeded() {
- if (storage_.is_null_)
+ if (!storage_.is_populated_)
return;
storage_.value_.~T();
- storage_.is_null_ = true;
+ storage_.is_populated_ = false;
}
OptionalStorage<T> storage_;
@@ -334,12 +334,12 @@ class Optional : public internal::Option
}
constexpr const T* operator->() const {
- DCHECK(!storage_.is_null_);
+ DCHECK(storage_.is_populated_);
return &value();
}
constexpr T* operator->() {
- DCHECK(!storage_.is_null_);
+ DCHECK(storage_.is_populated_);
return &value();
}
@@ -351,27 +351,27 @@ class Optional : public internal::Option
constexpr T&& operator*() && { return std::move(value()); }
- constexpr explicit operator bool() const { return !storage_.is_null_; }
+ constexpr explicit operator bool() const { return storage_.is_populated_; }
- constexpr bool has_value() const { return !storage_.is_null_; }
+ constexpr bool has_value() const { return storage_.is_populated_; }
constexpr T& value() & {
- DCHECK(!storage_.is_null_);
+ DCHECK(storage_.is_populated_);
return storage_.value_;
}
constexpr const T& value() const & {
- DCHECK(!storage_.is_null_);
+ DCHECK(storage_.is_populated_);
return storage_.value_;
}
constexpr T&& value() && {
- DCHECK(!storage_.is_null_);
+ DCHECK(storage_.is_populated_);
return std::move(storage_.value_);
}
constexpr const T&& value() const && {
- DCHECK(!storage_.is_null_);
+ DCHECK(storage_.is_populated_);
return std::move(storage_.value_);
}
@@ -382,8 +382,9 @@ class Optional : public internal::Option
// "T must be copy constructible");
static_assert(std::is_convertible<U, T>::value,
"U must be convertible to T");
- return storage_.is_null_ ? static_cast<T>(std::forward<U>(default_value))
- : value();
+ return storage_.is_populated_
+ ? value()
+ : static_cast<T>(std::forward<U>(default_value));
}
template <class U>
@@ -393,26 +394,27 @@ class Optional : public internal::Option
// "T must be move constructible");
static_assert(std::is_convertible<U, T>::value,
"U must be convertible to T");
- return storage_.is_null_ ? static_cast<T>(std::forward<U>(default_value))
- : std::move(value());
+ return storage_.is_populated_
+ ? std::move(value())
+ : static_cast<T>(std::forward<U>(default_value));
}
void swap(Optional& other) {
- if (storage_.is_null_ && other.storage_.is_null_)
+ if (!storage_.is_populated_ && !other.storage_.is_populated_)
return;
- if (storage_.is_null_ != other.storage_.is_null_) {
- if (storage_.is_null_) {
- storage_.Init(std::move(other.storage_.value_));
- other.FreeIfNeeded();
- } else {
+ if (storage_.is_populated_ != other.storage_.is_populated_) {
+ if (storage_.is_populated_) {
other.storage_.Init(std::move(storage_.value_));
FreeIfNeeded();
+ } else {
+ storage_.Init(std::move(other.storage_.value_));
+ other.FreeIfNeeded();
}
return;
}
- DCHECK(!storage_.is_null_ && !other.storage_.is_null_);
+ DCHECK(storage_.is_populated_ && other.storage_.is_populated_);
using std::swap;
swap(**this, *other);
}
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