http://llvm.org/bugs/show_bug.cgi?id=16828
Bug ID: 16828
Summary: [accepts-invalid] Dereferencing pointer to incomplete
enclosing class
Product: clang
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Clang accepts the following code:
struct S
{
int foo();
struct nested
{
S* outer;
auto bar() -> decltype(outer->foo());
};
};
GCC rejects it, with the following errors:
test.cpp:9:37: error: invalid use of incomplete type ‘struct S’
test.cpp:1:8: error: forward declaration of ‘struct S’
The reason for rejecting it is stated in [1]. If that reasoning is sound, then
clang should reject the code as well. If it's not, I'd be curious to hear why.
[1] http://gcc.gnu.org/ml/gcc-patches/2013-08/msg00398.html
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