http://llvm.org/bugs/show_bug.cgi?id=9236
Summary: Poor diagnostic for conditional expression with
mismatched types
Product: clang
Version: unspecified
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
>From a Clang user at Google:
"""
#include <cstddef>
class A {};
int main(int argc, char** argv) {
A a;
bool b = true;
A* foo = b ? a : NULL;
return 0;
}
The bug here is that I meant to write "&a", not "a". The error that
shows up is:
foo.cc:6:14: error: incompatible operand
types ('A' and 'long')
I was confused at first, because what did I write there that has
anything to do with numbers? Of course I quickly did realize that
NULL is just 0 and thus a long.
Thought: If you have incompatible operands for the second and third
arguments to the ternary operator, and exactly one of them matches the
surrounding context (as NULL matches the "A* foo =") and the other
doesn't, perhaps the error should point out the incompatibility
between the other argument and the surrounding context rather than
between the two terms?
"""
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