test/FrontendC++/weak-external.cpp

   1 // RUN: %llvmgxx %s -S -O2 -o - | not grep {_ZNSs12_S_constructIPKcEEPcT_S3_RKSaIcESt20forward_iterator_tag}
   2 // PR4262
   3
   4 // The "basic_string" extern template instantiation declaration is supposed to
   5 // suppress the implicit instantiation of non-inline member functions. Make sure
   6 // that we suppress the implicit instantiation of non-inline member functions
   7 // defined out-of-line. That we aren't instantiating the basic_string
   8 // constructor when we shouldn't be. Such an instantiation forces the implicit
   9 // instantiation of _S_construct<const char*>. Since _S_construct is a member
  10 // template, it's instantiation is *not* suppressed (despite being in
  11 // basic_string<char>), so we would emit it as a weak definition.
  12
  13 #include <stdexcept>
  14
  15 void dummysymbol() {
  16   throw(std::runtime_error("string"));
  17 }