Tested x86_64-pc-linux-gnu, applying to trunk. -- 8< --
A bug in the simplification I did around 91618; at this point X<int>::f has DECL_IMPLICIT_INSTANTIATION set, but we've already identified what template it corresponds to, so we don't want to call check_explicit_specialization. To distinguish this case we need to look at DECL_TI_TEMPLATE. grokfndecl has for a long time set it to the OVERLOAD in this case, while the new cases I added for 91618 were leaving DECL_TEMPLATE_INFO null; let's adjust them to match. PR c++/91618 PR c++/109649 gcc/cp/ChangeLog: * friend.cc (do_friend): Don't call check_explicit_specialization if DECL_TEMPLATE_INFO is already set. * decl2.cc (check_classfn): Set DECL_TEMPLATE_INFO. * name-lookup.cc (set_decl_namespace): Likewise. gcc/testsuite/ChangeLog: * g++.dg/template/friend77.C: New test. --- gcc/cp/decl2.cc | 1 + gcc/cp/friend.cc | 3 ++- gcc/cp/name-lookup.cc | 1 + gcc/testsuite/g++.dg/template/friend77.C | 19 +++++++++++++++++++ 4 files changed, 23 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/g++.dg/template/friend77.C diff --git a/gcc/cp/decl2.cc b/gcc/cp/decl2.cc index 9594be4092c..b510cdac554 100644 --- a/gcc/cp/decl2.cc +++ b/gcc/cp/decl2.cc @@ -855,6 +855,7 @@ check_classfn (tree ctype, tree function, tree template_parms) So tell check_explicit_specialization to look for a match. */ SET_DECL_IMPLICIT_INSTANTIATION (function); + DECL_TEMPLATE_INFO (function) = build_template_info (fns, NULL_TREE); matched = function; } diff --git a/gcc/cp/friend.cc b/gcc/cp/friend.cc index b36de2b20bb..5ab5c1fec73 100644 --- a/gcc/cp/friend.cc +++ b/gcc/cp/friend.cc @@ -661,7 +661,8 @@ do_friend (tree scope, tree declarator, tree decl, if (decl == error_mark_node) return error_mark_node; - if (!class_template_depth && DECL_IMPLICIT_INSTANTIATION (decl)) + if (!class_template_depth && DECL_IMPLICIT_INSTANTIATION (decl) + && TREE_CODE (DECL_TI_TEMPLATE (decl)) != TEMPLATE_DECL) /* "[if no non-template match is found,] each remaining function template is replaced with the specialization chosen by deduction from the friend declaration or discarded if deduction fails." diff --git a/gcc/cp/name-lookup.cc b/gcc/cp/name-lookup.cc index 8fd5733c1e2..ad03141df43 100644 --- a/gcc/cp/name-lookup.cc +++ b/gcc/cp/name-lookup.cc @@ -5938,6 +5938,7 @@ set_decl_namespace (tree decl, tree scope, bool friendp) So tell check_explicit_specialization to look for a match. */ SET_DECL_IMPLICIT_INSTANTIATION (decl); + DECL_TEMPLATE_INFO (decl) = build_template_info (old, NULL_TREE); return; } diff --git a/gcc/testsuite/g++.dg/template/friend77.C b/gcc/testsuite/g++.dg/template/friend77.C new file mode 100644 index 00000000000..f232cb10756 --- /dev/null +++ b/gcc/testsuite/g++.dg/template/friend77.C @@ -0,0 +1,19 @@ +// PR c++/109649 + +template <typename> +class X +{ + void f(){} +}; + +class Y +{ + friend void X<int>::f(); // { dg-error "private" } +}; + +int main() +{ + X<int> t; + t.f(); // { dg-error "private" } + Y b; +} base-commit: 3b7eecca20bcb05e0220b3d012df012902a23534 -- 2.31.1