http://llvm.org/bugs/show_bug.cgi?id=19685
Bug ID: 19685
Summary: constexpr does not work with placement new
Product: clang
Version: 3.4
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
#include <stddef.h>
constexpr void* operator new(size_t, int*) noexcept {
return nullptr;
}
int main() {
int* p = new (nullptr) int; // This is Okay
constexpr int* q = new (nullptr) int; // gcc works, clang compile
error
return *(p = q);
}
This code compiles with gcc 4.6, 4.7, 4.8, 4.9 and generates correct assembly
(with command line option "-std=c++0x")
It doesn't compile with clang 3.0, 3.2, 3.3, 3.4
(tried "-std=c++1y", "-std=c++11" and "-std=c++0x", none of them works)
Tested by Compiler Explorer: http://goo.gl/bmGtbR
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