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Extern template tweaks

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Document extern template functions support.
Extern templates result in new warning to differentiate
from template explicit instantiation definition warning.
This commit is contained in:
William S Fulton 2022-01-25 00:28:08 +00:00
commit 017900d57e
8 changed files with 89 additions and 16 deletions
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24
Examples/test-suite/errors/cpp_template_explicit_instantiation.i Normal file
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%module xxx
%inline %{
namespace std {
template<typename T> class vector {};
}
template<typename T> void Func() {}
%}
%inline %{
// Class template
template class std::vector<int>; // C++03 template explicit instantiation definition in C++
extern template class std::vector<int>; // C++11 template explicit instantiation declaration (extern template)
%}
%template(VectorInt) std::vector<int>; // SWIG template instantiation
%inline %{
// Function template
template void Func<int>(); // C++03 template explicit instantiation definition in C++
extern template void Func<int>(); // C++11 template explicit instantiation declaration (extern template)
%}
%template(FuncInt) Func<int>; // SWIG template instantiation

4
Examples/test-suite/errors/cpp_template_explicit_instantiation.stderr Normal file
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cpp_template_explicit_instantiation.i:12: Warning 320: Explicit template instantiation ignored.
cpp_template_explicit_instantiation.i:13: Warning 327: Extern template ignored.
cpp_template_explicit_instantiation.i:19: Warning 320: Explicit template instantiation ignored.
cpp_template_explicit_instantiation.i:20: Warning 327: Extern template ignored.