https://llvm.org/bugs/show_bug.cgi?id=23968
Bug ID: 23968
Summary: Wtautological-undefined-compare disabled with
double-macros
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Testcase:
#define NULL nullptr
#define MYIF(x) if (x) {}
struct X {};
void test(X &x) { MYIF(&x == NULL) }
with -std=c++11 should issue a warning, but doesn't. If you use 'nullptr' in
place of NULL directly, it does. If you write the if-stmt out instead of using
a macro for it, it does. But if you use two macros, it doesn't fire.
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