https://llvm.org/bugs/show_bug.cgi?id=27637
Bug ID: 27637
Summary: creating object of abstract class allowed in all
versions of clang++
Product: clang
Version: 3.8
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: pravasimeet...@yahoo.com
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 16308
--> https://llvm.org/bugs/attachment.cgi?id=16308&action=edit
bug in clang++
clang++ compiles ill formed C++ program successfully.
The following program is ill formed C++ program because it is not allowed to
create objects of abstract class. But in all versions of g++ the program
compiles successfully.
This question originally asked on stackoverflow by user Matt. See here:
http://stackoverflow.com/questions/37017094/why-do-gcc-and-clang-allow-me-to-construct-an-abstract-class
.
(See live demo here: http://melpon.org/wandbox/permlink/uT43g5lw26HWAbog )
#include <stdio.h>
class A
{
public:
A() {
printf("A()\n");
}
virtual void b() const = 0;
};
int main()
{
const A& a{};
a.b();
return 0;
}
The program is clearly invalid & implementation is required to produce a
diagnosis for this according to C++ standard.
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