忽略系统标题在叮当整洁

我有以下的最小的例子源文件，它触发一个铛-整齐警告系统中的标头：

#include <future> 

int main() { 
    std::promise<int> p; 
    p.set_value(3); 
}

使用铛-整齐4.0.0用的libstdC++ 7.0.1调用它在Ubuntu 17.04 ：

$ clang-tidy main.cpp -extra-arg=-std=c++14

产生

Running without flags. 
1 warning generated. 
/usr/lib/gcc/x86_64-linux-gnu/7.0.1/../../../../include/c++/7.0.1/mutex:693:5: warning: Address of stack memory associated with local variable '__callable' is still referred to by the global variable '__once_callable' upon returning to the caller. This will be a dangling reference [clang-analyzer-core.StackAddressEscape] 
    } 
    ^
/home/user/main.cpp:5:3: note: Calling 'promise::set_value' 
    p.set_value(3); 
^
/usr/lib/gcc/x86_64-linux-gnu/7.0.1/../../../../include/c++/7.0.1/future:1094:9: note: Calling '_State_baseV2::_M_set_result' 
     { _M_future->_M_set_result(_State::__setter(this, std::move(__r))); } 
     ^
/usr/lib/gcc/x86_64-linux-gnu/7.0.1/../../../../include/c++/7.0.1/future:401:2: note: Calling 'call_once' 
     call_once(_M_once, &_State_baseV2::_M_do_set, this, 
     ^
/usr/lib/gcc/x86_64-linux-gnu/7.0.1/../../../../include/c++/7.0.1/mutex:691:11: note: Assuming '__e' is 0 
     if (__e) 
     ^
/usr/lib/gcc/x86_64-linux-gnu/7.0.1/../../../../include/c++/7.0.1/mutex:691:7: note: Taking false branch 
     if (__e) 
    ^
/usr/lib/gcc/x86_64-linux-gnu/7.0.1/../../../../include/c++/7.0.1/mutex:693:5: note: Address of stack memory associated with local variable '__callable' is still referred to by the global variable '__once_callable' upon returning to the caller. This will be a dangling reference 
    }

我想隐藏警告系统头文件中。我试过以下内容：

$ clang-tidy -extra-arg=-std=c++14 main.cpp -header-filter=$(realpath .) -system-headers=0

但是警告仍然显示。

来源

2017-10-09 Heinzi

我也遇到了这个问题，并花了一些时间试图弄清楚，但我看不到一种方式来禁用这种类型的警告铿锵。

从阅读this discussion on the LLVM issue tracker regarding a similar issue，我得到的印象是，问题是，距离铛，整洁的角度来看，警告实际上位于main.cpp，因为调用set_value是从那里。

我的解决方法是禁用clang-tidy中的静态分析检查，并使用scan-build utility运行clang的静态分析，这似乎可以避免这些问题。例如，使用您的main.cpp：

$ scan-build-3.9 clang++ -std=c++14 main.cpp 
scan-build: Using '/usr/lib/llvm-3.9/bin/clang' for static analysis 
In file included from main.cpp:1: 
In file included from /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/future:39: 
/usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/mutex:621:11: warning: Address of stack memory associated with local variable '__callable' is still referred to by the global variable '__once_callable' upon returning to the caller. This will be a dangling reference 
     if (__e) 
      ^~~ 
1 warning generated. 
scan-build: Removing directory '/tmp/scan-build-2017-12-02-112018-13035-1' because it contains no reports. 
scan-build: No bugs found.

分析仪发现在系统头相同的错误，但它足够聪明，不包括在最终的报告。（“没有发现错误”）

如果您对样式指南类型警告感兴趣，例如modernize-*或readability-*，您仍然需要单独运行clang-tidy。

来源

2017-12-02 18:40:19

忽略系统标题在叮当整洁

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