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https://issues.apache.org/jira/browse/PARQUET-1226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16369587#comment-16369587
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ASF GitHub Bot commented on PARQUET-1226:
-----------------------------------------
cpcloud commented on a change in pull request #442: PARQUET-1226: Fixes for
CHECKIN compiler warning level with clang 5.0
URL: https://github.com/apache/parquet-cpp/pull/442#discussion_r169184645
##########
File path: src/parquet/util/comparison.h
##########
@@ -38,15 +38,13 @@ class PARQUET_EXPORT CompareDefault : public Comparator {
public:
typedef typename DType::c_type T;
CompareDefault() {}
- virtual ~CompareDefault() {}
Review comment:
Yep.
Found [this SO answer](https://stackoverflow.com/a/27220184/564538), then I
downloaded the standard and confirmed (the answer says subsection 9, but I
found it in subsection 8)
Section 12.4/8 says:
```
If a class has a base class with a
virtual destructor, its destructor (whether user- or implicitly-declared) is
virtual.
```
Coupled with the implicit definitions of a destructor if they are used (and
not already defined) this means defining an empty virtual destructor is
unnecessary.
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> [C++] Fix new build warnings with clang 5.0
> -------------------------------------------
>
> Key: PARQUET-1226
> URL: https://issues.apache.org/jira/browse/PARQUET-1226
> Project: Parquet
> Issue Type: Bug
> Components: parquet-cpp
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Priority: Major
> Fix For: cpp-1.5.0
>
>
> Follow-on work since Apache Arrow has migrated to clang 5.0 in ARROW-2117
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