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make_span overloads for pointer to vector (#7374) (#7435)

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* make_span overloads for pointer to vector (#7374)

* findings from the review

Co-authored-by: Derek Bailey <derekbailey@google.com>
This commit is contained in:
Stefan F
2022-08-14 21:21:55 +02:00
committed by GitHub
parent fa1174aa7b
commit 3cc2daa78f
2 changed files with 90 additions and 0 deletions
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18
include/flatbuffers/vector.h
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@@ -327,6 +327,24 @@ FLATBUFFERS_CONSTEXPR_CPP11 flatbuffers::span<const uint8_t> make_bytes_span(
return span<const uint8_t>(vec.Data(), vec.size() * sizeof(U));
}
// Convenient helper functions to get a span of any vector, regardless
// of whether it is null or not (the field is not set).
template<class U>
FLATBUFFERS_CONSTEXPR_CPP11 flatbuffers::span<U> make_span(Vector<U> *ptr)
FLATBUFFERS_NOEXCEPT {
static_assert(Vector<U>::is_span_observable,
"wrong type U, only LE-scalar, or byte types are allowed");
return ptr ? make_span(*ptr) : span<U>();
}
template<class U>
FLATBUFFERS_CONSTEXPR_CPP11 flatbuffers::span<const U> make_span(
const Vector<U> *ptr) FLATBUFFERS_NOEXCEPT {
static_assert(Vector<U>::is_span_observable,
"wrong type U, only LE-scalar, or byte types are allowed");
return ptr ? make_span(*ptr) : span<const U>();
}
// Represent a vector much like the template above, but in this case we
// don't know what the element types are (used with reflection.h).
class VectorOfAny {