Fix Windows build (#17917)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17917
D14375995 introduced instantiation of the following templates with `bool` type (more specifically `To` is `int64_t`, `From` is `bool`):
```
template <typename To, typename From>
typename std::enable_if<std::is_integral<From>::value, bool>::type overflows(
From f) {
using limit = std::numeric_limits<typename scalar_value_type<To>::type>;
if (!limit::is_signed && std::numeric_limits<From>::is_signed) {
// allow for negative numbers to wrap using two's complement arithmetic.
// For example, with uint8, this allows for `a - b` to be treated as
// `a + 255 * b`.
return f > limit::max() ||
(f < 0 && -static_cast<uint64_t>(f) > limit::max());
} else {
return f < limit::lowest() || f > limit::max();
}
}
template <typename To, typename From>
typename std::enable_if<std::is_floating_point<From>::value, bool>::type
overflows(From f) {
using limit = std::numeric_limits<typename scalar_value_type<To>::type>;
if (limit::has_infinity && std::isinf(static_cast<double>(f))) {
return false;
}
if (!limit::has_quiet_NaN && (f != f)) {
return true;
}
return f < limit::lowest() || f > limit::max();
}
```
MSVC gives C4804 warning and because "treat warnings as errors" is on it fails to build on Windows. Disabling such warning for those 2 templates.
Reviewed By: mingzhe09088
Differential Revision: D14421157
fbshipit-source-id: e72ba34406628c84da48518b32a46f851819bad1
