- explicit specialization problem - 2 Updates
- Wading through template instantiation errors for allocator - 1 Update
| Ian Collins <ian-news@hotmail.com>: Jan 08 10:26AM +1300 On 07/01/2020 23:26, Bonita Montero wrote: > x.cpp(30): note: see declaration of 'Lib<My<T>>' > x.cpp(31): error C2447: '{': missing function header (old-style formal > list?) Use a more friendly compiler... $ clang++ -std=c++17 /tmp/x.cc /tmp/x.cc:22:1: warning: extraneous template parameter list in template specialization template<> ^~~~~~~~~~ -- Ian. |
| "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com>: Jan 07 11:23PM +0100 On 07.01.2020 11:26, Bonita Montero wrote: > { > void f(); > }; The `template<>` does not make sense here. Just remove that line. > x.cpp(30): note: see declaration of 'Lib<My<T>>' > x.cpp(31): error C2447: '{': missing function header (old-style formal > list?) I get the same diagnostics with MSVC 2019. With MinGW g++ 9.2: _.cpp:25:8: error: too many template-parameter-lists 25 | struct Lib<My<T>> | ^~~~~~~~~~ _.cpp:31:20: error: invalid use of incomplete type 'struct Lib<My<T> >' 31 | void Lib<My<T>>::f() | ^ _.cpp:12:8: note: declaration of 'struct Lib<My<T> >' 12 | struct Lib | ^~~ When the offending `template<>` is removed both compilers accept the code. - Alf |
| Bonita Montero <Bonita.Montero@gmail.com>: Jan 07 07:50PM +0100 >> It fails to compile on older C++ compilers, before C++11 > It should fail to compile with compilers that enforce good taste. auto isn't good taste except when necessary. |
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