When make_base_init_ok changes a call to a complete constructor into a call
to a base constructor, we were never marking the base ctor as used, so it
didn't get emitted.
PR c++/102045
gcc/cp/ChangeLog:
* call.cc (make_base_init_ok): Call make_used.
gcc/testsuite/ChangeLog:
* g++.dg/cpp1z/aggr-base12.C: New test.
call target. It would be possible to splice in the appropriate
arguments, but probably not worth the complexity. */
return false;
+ mark_used (fn);
AGGR_INIT_EXPR_FN (exp) = build_address (fn);
return true;
}
--- /dev/null
+// PR c++/102045
+// { dg-do link { target c++17 } }
+
+template<typename T>
+struct span
+{
+ template<unsigned long N>
+ constexpr span(T (&a)[N]) : data(a), len(N) { }
+ constexpr bool empty() const { return len == 0; }
+ T* data;
+ unsigned long len;
+};
+
+struct byte_writer: span<char> {
+ constexpr void do_something() noexcept {
+ (void)this->empty();
+ }
+};
+
+int main() {
+ char array[1];
+ auto writer = byte_writer{array};
+ writer.do_something();
+}