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Don't generate RTTI for allocator

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This commit is contained in:
Victor Zverovich 2020-04-19 15:52:48 -07:00
parent 0c86f467bc
commit e253b371b2
1 changed files with 11 additions and 8 deletions
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19
include/fmt/format.h
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@ -627,14 +627,17 @@ enum { inline_buffer_size = 500 };
*/
template <typename T, std::size_t SIZE = inline_buffer_size,
typename Allocator = std::allocator<T>>
class basic_memory_buffer : private Allocator, public internal::buffer<T> {
class basic_memory_buffer : public internal::buffer<T> {
private:
T store_[SIZE];
// Don't inherit from Allocator avoid generating type_info for it.
Allocator alloc_;
// Deallocate memory allocated by the buffer.
void deallocate() {
T* data = this->data();
if (data != store_) Allocator::deallocate(data, this->capacity());
if (data != store_) alloc_.deallocate(data, this->capacity());
}
protected:
@ -645,7 +648,7 @@ class basic_memory_buffer : private Allocator, public internal::buffer<T> {
using const_reference = const T&;
explicit basic_memory_buffer(const Allocator& alloc = Allocator())
: Allocator(alloc) {
: alloc_(alloc) {
this->set(store_, SIZE);
}
~basic_memory_buffer() FMT_OVERRIDE { deallocate(); }
@ -653,8 +656,7 @@ class basic_memory_buffer : private Allocator, public internal::buffer<T> {
private:
// Move data from other to this buffer.
void move(basic_memory_buffer& other) {
Allocator &this_alloc = *this, &other_alloc = other;
this_alloc = std::move(other_alloc);
alloc_ = std::move(other.alloc_);
T* data = other.data();
std::size_t size = other.size(), capacity = other.capacity();
if (data == other.store_) {
@ -692,7 +694,7 @@ class basic_memory_buffer : private Allocator, public internal::buffer<T> {
}
// Returns a copy of the allocator associated with this buffer.
Allocator get_allocator() const { return *this; }
Allocator get_allocator() const { return alloc_; }
};
template <typename T, std::size_t SIZE, typename Allocator>
@ -704,7 +706,8 @@ void basic_memory_buffer<T, SIZE, Allocator>::grow(std::size_t size) {
std::size_t new_capacity = old_capacity + old_capacity / 2;
if (size > new_capacity) new_capacity = size;
T* old_data = this->data();
T* new_data = std::allocator_traits<Allocator>::allocate(*this, new_capacity);
T* new_data =
std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
// The following code doesn't throw, so the raw pointer above doesn't leak.
std::uninitialized_copy(old_data, old_data + this->size(),
internal::make_checked(new_data, new_capacity));
@ -712,7 +715,7 @@ void basic_memory_buffer<T, SIZE, Allocator>::grow(std::size_t size) {
// deallocate must not throw according to the standard, but even if it does,
// the buffer already uses the new storage and will deallocate it in
// destructor.
if (old_data != store_) Allocator::deallocate(old_data, old_capacity);
if (old_data != store_) alloc_.deallocate(old_data, old_capacity);
}
using memory_buffer = basic_memory_buffer<char>;