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https://issues.apache.org/jira/browse/ARROW-2505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou resolved ARROW-2505.
-----------------------------------
Resolution: Fixed
Fix Version/s: 0.10.0
Issue resolved by pull request 1980
[https://github.com/apache/arrow/pull/1980]
> [C++] Disable MSVC warning C4800
> --------------------------------
>
> Key: ARROW-2505
> URL: https://issues.apache.org/jira/browse/ARROW-2505
> Project: Apache Arrow
> Issue Type: Wish
> Components: C++
> Reporter: Antoine Pitrou
> Priority: Major
> Labels: build, pull-request-available, windows
> Fix For: 0.10.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> This warning is practically pointless, and since we treat warnings as errors
> on Appveyor, it imposes spurious back-and-forths to fix it when it occurs.
> https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4800
> {quote}This warning is generated when a value that is not bool is assigned or
> coerced into type bool. Typically, this message is caused by assigning int
> variables to bool variables where the int variable contains only values true
> and false, and could be redeclared as type bool. If you cannot rewrite the
> expression to use type bool, then you can add "!=0" to the expression, which
> gives the expression type bool. Casting the expression to type bool does not
> disable the warning, which is by design.
> This warning is no longer generated in Visual Studio 2017.
> {quote}
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