felipecrv commented on code in PR #36310:
URL: https://github.com/apache/arrow/pull/36310#discussion_r1243884320
##########
cpp/src/arrow/scalar.cc:
##########
@@ -1127,6 +1127,28 @@ Status CastImpl(const StructScalar& from, StringScalar*
to) {
return Status::OK();
}
+// casts between variable-length and fixed-length list types
+template <typename ToScalar>
+enable_if_t<is_list_like_type<typename ToScalar::TypeClass>::value &&
+ ToScalar::TypeClass::type_id != Type::MAP,
+ Status>
+CastImpl(const BaseListScalar& from, ToScalar* to) {
+ DCHECK(from.type->id() == Type::LIST || from.type->id() == Type::LARGE_LIST
||
+ from.type->id() == Type::FIXED_SIZE_LIST);
Review Comment:
I will use `is_var_length_list` in the enable-if and expand the test cases.
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