https://llvm.org/bugs/show_bug.cgi?id=26938
Bug ID: 26938
Summary: failure to resolve nested class template after
befriending it
Product: clang
Version: 3.8
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: l...@fortitu.de
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
clang 3.8 and trunk (r263425) fail to compile the following code snippet.
Recent clang versions up to 3.7 and all major gcc versions from 4.0 till 5.2
compile the code without warnings.
(The testcase was reduced mostly with creduce from the polymake source)
Removing the friend statement in 'struct A' fixes the error, alternatively
removing the forward declaration of 'Y' fixes it as well.
// code
template <typename> struct X {
template <typename> struct Y;
struct A {
template <typename> friend struct Y;
};
template <typename> struct Y { };
};
template <typename>
struct B : X<int>::template Y<int> { } ;
$ clang++ -c bug.cc
bug.cc:9:29: error: 'Y' following the 'template' keyword does not refer to a
template
struct B : X<int>::template Y<int> { } ;
~~~~~~~~ ^
bug.cc:9:30: error: expected class name
struct B : X<int>::template Y<int> { } ;
^
2 errors generated.
$ clang++ -v
clang version 3.9.0 (http://llvm.org/git/clang.git
00560a217508ec5553150bb43269359ded932a88) (http://llvm.org/git/llvm.git
a4bfc57321dbb6d712297822e6be9855c1bf8791)
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