icexelloss commented on code in PR #34606:
URL: https://github.com/apache/arrow/pull/34606#discussion_r1140604232
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cpp/src/arrow/engine/substrait/options.cc:
##########
@@ -161,10 +161,9 @@ class DefaultExtensionProvider : public
BaseExtensionProvider {
ARROW_ASSIGN_OR_RAISE(auto renamed_schema, schema->WithNames(columns));
auto input_decls = MakeDeclarationInputs(inputs);
ARROW_ASSIGN_OR_RAISE(
- auto decl,
- conv_opts.named_tap_provider(named_tap_rel.kind(), input_decls,
- named_tap_rel.name(),
std::move(renamed_schema)));
- return RelationInfo{{std::move(decl), std::move(renamed_schema)},
std::nullopt};
+ auto decl, conv_opts.named_tap_provider(named_tap_rel.kind(),
input_decls,
+ named_tap_rel.name(),
renamed_schema));
+ return RelationInfo{{std::move(decl), renamed_schema}, std::nullopt};
Review Comment:
I don't think that would be sufficient. IIUC, std::move would nullify all
other shared_ptr, meaning if inside "named_tap_provider" the shared_ptr is
passed to some other object (since it receives a shared_ptr, it is a reasonable
thing to do) then it would be nullified as well after we `std::move` the
second.
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