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[pytorch] Fix MSVC unexpected tokens following preprocessor directive (#105922)

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Summary:
Fix this warning:
```
caffe2\c10\macros\Macros.h(138): warning C4067: unexpected tokens following preprocessor directive - expected a newline
```
`caffe2/c10/util/variant.h` already has a similar to check and define a stub for `__has_attribute(x)`, so this would not be new to caffe2/pytorch.

Test Plan: CI should complete, still with plenty of caffe2 warnings but this one should be gone from the Windows build log

Differential Revision: D47735319

Pull Request resolved: https://github.com/pytorch/pytorch/pull/105922
Approved by: https://github.com/kit1980
This commit is contained in:
James Donald 2023-07-27 06:03:31 +00:00 committed by PyTorch MergeBot
parent b435bff53a
commit a1d0db1c60
1 changed files with 4 additions and 0 deletions
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4
c10/macros/Macros.h
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@ -134,6 +134,10 @@
#define C10_UNUSED __attribute__((__unused__))
#endif //_MSC_VER
#if !defined(__has_attribute)
#define __has_attribute(x) 0
#endif
// Direct port of LLVM_ATTRIBUTE_USED.
#if __has_attribute(used)
#define C10_USED __attribute__((__used__))