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caffe2_benchmark msvc build fix (#15619)

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Summary:
Fixing error in caffe2_benchmark binary

```
2018-12-29T14:09:59.7867995Z   d:\a\1\s\caffe2_builders\v141\pytorch\binaries\benchmark_helper.h(90): error C2678: binary '|=': no operator found which takes a left-hand operand of type 'std::_Iosb<int>::_Openmode' (or there is no acceptable conversion) (compiling source file D:\a\1\s\caffe2_builders\v141\pytorch\binaries\benchmark_helper.cc) [D:\a\1\s\caffe2_builders\v141\pytorch\build\Release\binaries\caffe2_benchmark.vcxproj]
2018-12-29T14:09:59.7868252Z   d:\a\1\s\caffe2_builders\v141\pytorch\binaries\benchmark_helper.h(92): error C2678: binary '|=': no operator found which takes a left-hand operand of type 'std::_Iosb<int>::_Openmode' (or there is no acceptable conversion) (compiling source file D:\a\1\s\caffe2_builders\v141\pytorch\binaries\benchmark_helper.cc) [D:\a\1\s\caffe2_builders\v141\pytorch\build\Release\binaries\caffe2_benchmark.vcxproj]
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15619

Differential Revision: D13580195

Pulled By: soumith

fbshipit-source-id: b0a4479cd5f7555801b1977aeee96b6433293da7
This commit is contained in:
ArutyunovG 2019-01-05 08:23:02 -08:00 committed by Facebook Github Bot
parent a918f1d9af
commit 2fb2d080d3
1 changed files with 4 additions and 3 deletions
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7
binaries/benchmark_helper.h
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@ -85,11 +85,12 @@ void writeTextOutput(
str.pop_back();
lines.push_back(str);
auto flags = std::ios::out;
// static casts are workaround for MSVC build
auto flags = static_cast<std::ios_base::openmode>(std::ios::out);
if (index != 0) {
flags |= std::ios::app;
flags |= static_cast<std::ios_base::openmode>(std::ios::app);
} else {
flags |= std::ios::trunc;
flags |= static_cast<std::ios_base::openmode>(std::ios::trunc);
}
std::ofstream output_file(output_name, flags);
std::ostream_iterator<std::string> output_iterator(output_file, "\n");