bkietz commented on code in PR #36418:
URL: https://github.com/apache/arrow/pull/36418#discussion_r1254497624
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cpp/src/arrow/buffer.h:
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@@ -137,6 +139,25 @@ class ARROW_EXPORT Buffer {
/// \return a new Buffer instance
static std::shared_ptr<Buffer> FromString(std::string data);
+ /// \brief Construct an immutable buffer that takes ownership of the contents
+ /// of an std::vector (without copying it).
+ ///
+ /// \param[in] data a string to own
+ /// \return a new Buffer instance
+ template <typename T>
+ static std::shared_ptr<Buffer> FromVector(std::vector<T> vec) {
Review Comment:
I'll rename and add a static assert for triviality of T.
I would prefer not to forbid copies just to prevent them from happening
accidentally. This method would not be used in a performance critical context
anyway. We build buffers with BufferBuilder in perf-critical contexts; I
anticipate this mostly being useful in tests where requiring a call to
something like `kj::cp` would get annoying.
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