https://llvm.org/bugs/show_bug.cgi?id=25182
Bug ID: 25182
Summary: Typedef return type + Fully Qualified name for a
member function causes error in out-of-line definition
Product: clang
Version: 3.7
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: a...@gha.st
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
When defining a member function out of line with its fully qualified name and a
return type that is a type alias, clang will cause an error.
Consider the following example:
// compiled with clang++ -std=c++14 file.cpp
using test_t = int;
struct S { test_t f(); };
// This will error out with:
// error: 'test_t' (aka 'int') is not a class, namespace, or enumeration
test_t ::S::f() { return 0; }
// Defining it like this will compile correctly:
// test_t S::f() { return 0; }
// The following also works:
// int ::S::f() { return 0; }
// a main function so it links correctly:
int main() { }
This bug appears with both the following clang++ versions:
$ clang++ -v
clang version 3.7.0 (tags/RELEASE_370/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation:
/usr/bin/../lib/gcc/x86_64-unknown-linux-gnu/5.2.0
Found candidate GCC installation:
/usr/bin/../lib64/gcc/x86_64-unknown-linux-gnu/5.2.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0
Found candidate GCC installation: /usr/lib64/gcc/x86_64-unknown-linux-gnu/5.2.0
Selected GCC installation: /usr/bin/../lib64/gcc/x86_64-unknown-linux-gnu/5.2.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
$ clang++ -v
Apple LLVM version 7.0.0 (clang-700.0.72)
Target: x86_64-apple-darwin15.0.0
Thread model: posix
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