http://llvm.org/bugs/show_bug.cgi?id=20340
Bug ID: 20340
Summary: false different type error message with templates and
using
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 12782
--> http://llvm.org/bugs/attachment.cgi?id=12782&action=edit
test case
clang wrongly reports that the return type of the out-of-line definition of a
member function differs from the declared one.
I tested the attached test code with clang 3.3 and 5.0, g++, icc and vc++.
Only clang reports the following error:
not_same_return.cpp:32:41: error: out-of-line definition of 'Derived::f'
differs from the declaration in the return type
typename BaseClass<T>::Type Derived<T>::f ()
^
not_same_return.cpp:19:18: note: previous declaration is here
virtual Type f ();
^
1 error generated.
I triede the two following workarounds:
1: Changing
template <typename T>
typename BaseClass<T>::Type Derived<T>::f (){...}
to
template <typename T>
typename Derived<T>::Type Derived<T>::f (){...}
makes compilation with clang succeed and that with g++ fail.
2: Replacing
using BaseClass<T>::Type;
with
typedef BaseClass<T>::Type Type;
in the derived class makes both clang and g++ compile
(I cannot test with icc and vc++ at the moment)
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