Antoine Pitrou created ARROW-2505:
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Summary: [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
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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