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authorTom Sepez <tsepez@chromium.org>2018-04-09 17:45:54 +0000
committerChromium commit bot <commit-bot@chromium.org>2018-04-09 17:45:54 +0000
commit269963f90fa882869c3a33c8c9ecba41351cb27d (patch)
treeb2e73bb87dc8b1b4fe51658495e0faafb086975a /third_party/base/span.h
parent1ee9601b01259b3e1b1a5b43801264ec6f5090c1 (diff)
downloadpdfium-269963f90fa882869c3a33c8c9ecba41351cb27d.tar.xz
Make pdfium::span<> be based off of UnownedPtr<>.
Because we can get the lifetime check for free if we do this. This requires adding some "constexpr/noexcept" to UnownedPtr to make the types line up with what span.h requires. Change-Id: I45918f8723122082036eed959f769644ab4c509f Reviewed-on: https://pdfium-review.googlesource.com/29672 Commit-Queue: Tom Sepez <tsepez@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
Diffstat (limited to 'third_party/base/span.h')
-rw-r--r--third_party/base/span.h15
1 files changed, 8 insertions, 7 deletions
diff --git a/third_party/base/span.h b/third_party/base/span.h
index d8d8f29e7c..034c6a35e7 100644
--- a/third_party/base/span.h
+++ b/third_party/base/span.h
@@ -13,6 +13,7 @@
#include <type_traits>
#include <utility>
+#include "core/fxcrt/unowned_ptr.h"
#include "third_party/base/logging.h"
namespace pdfium {
@@ -224,14 +225,14 @@ class span {
const span last(size_t count) const {
CHECK(count <= size_);
- return span(data_ + (size_ - count), count);
+ return span(data_.Get() + (size_ - count), count);
}
const span subspan(size_t pos, size_t count = -1) const {
const auto npos = static_cast<size_t>(-1);
CHECK(pos <= size_);
CHECK(count == npos || count <= size_ - pos);
- return span(data_ + pos, count == npos ? size_ - pos : count);
+ return span(data_.Get() + pos, count == npos ? size_ - pos : count);
}
// [span.obs], span observers
@@ -241,13 +242,13 @@ class span {
// [span.elem], span element access
const T& operator[](size_t index) const noexcept {
CHECK(index < size_);
- return data_[index];
+ return data_.Get()[index];
}
- constexpr T* data() const noexcept { return data_; }
+ constexpr T* data() const noexcept { return data_.Get(); }
// [span.iter], span iterator support
- constexpr iterator begin() const noexcept { return data_; }
- constexpr iterator end() const noexcept { return data_ + size_; }
+ constexpr iterator begin() const noexcept { return data_.Get(); }
+ constexpr iterator end() const noexcept { return data_.Get() + size_; }
constexpr const_iterator cbegin() const noexcept { return begin(); }
constexpr const_iterator cend() const noexcept { return end(); }
@@ -267,7 +268,7 @@ class span {
}
private:
- T* data_;
+ UnownedPtr<T> data_;
size_t size_;
};