https://llvm.org/bugs/show_bug.cgi?id=23733
Bug ID: 23733
Summary: [Windows] Clang doesn't support std::atomic<function
pointer> with Microsoft's STL
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
This code doesn't work with clang-cl for Visual Studio 2013:
void test() {
std::atomic<void (*)()> fptr(nullptr);
fptr.load();
}
The problem is that in atomic's implementation, all pointer atomics (which
includes pointer-to-function atomics) store a void* internally, and load()
static_casts the void* to the actual pointer type. Apparently, Microsoft's
compiler accepts a static_cast<void (*)()>((void*)0). clang-cl does not.
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