https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78923
Bug ID: 78923
Summary: bad error message about missing template argument
Product: gcc
Version: 6.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: drepper.fsp+rhbz at gmail dot com
Target Milestone: ---
Here is another case where the error message emitted by gcc (albeit, 6.2.1, I
don't have a more recent version handy):
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
template<typename T>
struct A;
template<typename T>
struct B {
B(A<T>*);
};
template<typename T>
B<T>::B(A*) { // <-- should be: B<T>::B(A<T>*) {
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Notice the missing template argument. The error message emitted is:
u.cc:10:8: error: expected constructor, destructor, or type conversion before
‘(’ token
B<T>::B(A*) {
^
In comparison, clang++ emits:
u.cc:10:9: error: use of class template 'A' requires template arguments
B<T>::B(A*) {
^
u.cc:2:8: note: template is declared here
struct A;
^
