diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/types/span.h')
| -rw-r--r-- | third_party/abseil_cpp/absl/types/span.h | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/third_party/abseil_cpp/absl/types/span.h b/third_party/abseil_cpp/absl/types/span.h index 734db695e3..4e450fc95b 100644 --- a/third_party/abseil_cpp/absl/types/span.h +++ b/third_party/abseil_cpp/absl/types/span.h @@ -27,22 +27,17 @@ // `Span<const T>` when such types may be difficult to identify due to issues // with implicit conversion. // -// The C++ standards committee currently has a proposal for a `std::span` type, -// (http://wg21.link/p0122), which is not yet part of the standard (though may -// become part of C++20). As of August 2017, the differences between -// `absl::Span` and this proposal are: -// * `absl::Span` uses `size_t` for `size_type` -// * `absl::Span` has no `operator()` -// * `absl::Span` has no constructors for `std::unique_ptr` or -// `std::shared_ptr` +// The C++20 draft standard includes a `std::span` type. As of June 2020, the +// differences between `absl::Span` and `std::span` are: +// * `absl::Span` has `operator==` (which is likely a design bug, +// per https://abseil.io/blog/20180531-regular-types) // * `absl::Span` has the factory functions `MakeSpan()` and // `MakeConstSpan()` -// * `absl::Span` has `front()` and `back()` methods // * bounds-checked access to `absl::Span` is accomplished with `at()` // * `absl::Span` has compiler-provided move and copy constructors and // assignment. This is due to them being specified as `constexpr`, but that // implies const in C++11. -// * `absl::Span` has no `element_type` or `index_type` typedefs +// * `absl::Span` has no `element_type` typedef // * A read-only `absl::Span<const T>` can be implicitly constructed from an // initializer list. // * `absl::Span` has no `bytes()`, `size_bytes()`, `as_bytes()`, or |