Control: tags -1 + moreinfo please could you recheck, also with the gcc-snapshot package?
and an example script or Makefile maybe better for a reproducer. On 20.06.24 14:32, Frank B. Brokken wrote:
Package: libstdc++-14-dev Version: 14-20240330-1 Severity: normal Tags: upstream Dear Maintainer, * What led up to the situation? When specifying a 'using' declaration the compiler produces an error when the -fmodules-ts flag is used. * What exactly did you do (or not do) that was effective (or ineffective)? The following program compiles correctly when -fmodules is *not* specified, and produces an error when -fmodules *is* specified. In the latter case: if instead of the #include directives 'import' statements (like 'import <vector>;' are used the same error results. But when '#include <iostream>' (or 'import <iostream>;' is omitted compilation using the -fmodules-ts flag correctly completes. The following source file (between ======= lines) was compiled by calling: g++ --std=c++23 -Wall -fmodules-ts -freport-bug -c main.cc =================================================== #include <iostream> #include <vector>int main(){ using VectorInt = std::vector<int>;VectorInt vi(3);} =================================================== * What was the outcome of this action? main.cc: In function ‘int main()’: main.cc:6:38: error: wrong number of template arguments (1, should be 2) 6 | using VectorInt = std::vector<int>; | ^ In file included from /usr/include/c++/14/ostream:43, from /usr/include/c++/14/iostream:41, of module /usr/include/c++/14/iostream, imported at main.cc:1: /usr/include/c++/14/format:2577:36: note: provided for ‘template<class, class> class std::vector’ 2577 | template<typename, typename> class vector; | ^~~~~~ main.cc:6:28: error: ‘<expression error>’ in namespace ‘std’ does not name a type 6 | using VectorInt = std::vector<int>; | ^~~~~~~~~~~ main.cc:8:5: error: ‘VectorInt’ was not declared in this scope 8 | VectorInt vi(3); | ^~~~~~~~~ * What outcome did you expect instead? The same as when -fmodule-ts is not specified: errorless compilation
