http://llvm.org/bugs/show_bug.cgi?id=10792
Summary: warning vs error for dyncast8.C
Product: clang
Version: 2.9
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: Frontend
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=7163)
--> (http://llvm.org/bugs/attachment.cgi?id=7163)
g++.old-deja/g++.mike/dyncast8.C
g++ reports no warning or error.
icpc reports a warning.
clang++ an error.
for g++ compatibility mode, i think that that things which are easy to allow
should be allowed.
rkotler@ubuntu-rkotler:~/icpc$ icpc
/home/rkotler/gcc-4.4.6/gcc/testsuite/g++.old-deja/g++.mike/dyncast8.C/home/rkotler/gcc-4.4.6/gcc/testsuite/g++.old-deja/g++.mike/dyncast8.C(14):
warning #854: const variable "b" requires an initializer -- class "Derived" has
no user-provided default constructor
const Derived b;
^
rkotler@ubuntu-rkotler:~/icpc$ /home/rkotler/build_llvm/install/bin/clang++
/home/rkotler/gcc-4.4.6/gcc/testsuite/g++.old-deja/g++.mike/dyncast8.C
/home/rkotler/gcc-4.4.6/gcc/testsuite/g++.old-deja/g++.mike/dyncast8.C:14:19:
error:
default initialization of an object of const type 'const Derived'
requires a user-provided default constructor
const Derived b;
^
1 error generated.
rkotler@ubuntu-rkotler:~/icpc$ g++
/home/rkotler/gcc-4.4.6/gcc/testsuite/g++.old-deja/g++.mike/dyncast8.Crkotler@ubuntu-rkotler:~/icpc$
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