Elevate Windows CI to /W2 (sans C4146/C4244) #17581
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C4146[1] is about unary minus applied to unsigned operands; that behavior is well defined, and apparently used deliberately in the code base. C4244[2] is about possible loss of data when converting to another arithmetic type. This is addressed by another PR[3]. Anyhow, it seems like a no brainer to elevate to `/W2` even if we have to exempt two categories of warnings, since we can catch some others. [1] <https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4146?view=msvc-170> [2] <https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4244> [3] <php#17076>
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C4146[1] is about unary minus applied to unsigned operands; that behavior is well defined, and apparently used deliberately in the code base.
C4244[2] is about possible loss of data when converting to another arithmetic type. This is addressed by another PR[3].
Anyhow, it seems like a no brainer to elevate to
/W2even if we have to exempt two categories of warnings, since we can catch some others.[1] https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4146?view=msvc-170
[2] https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4244
[3] #17076