Bug 20685 – Missing const in name mangling with C++ when using templates

cpp.cpp: ----- template<typename K, typename V> void cpp_test (const K&, const V&) { } #define INSTANTIATE(K, V) template void cpp_test<K, V>(const K&, const V&); INSTANTIATE(int, int) ----- d.d: ----- extern(C++) void cpp_test (K, V)(ref const K key, ref const V value); void main () { int i; cpp_test(i, i); } ----- $ g++ -c cpp.cpp -ocpp.o $ dmd -c d.d -ofd.o $ nm cpp.o | grep cpp_test 0000000000000000 W _Z8cpp_testIiiEvRKT_RKT0_ $ nm d.o | grep cpp_test U _Z8cpp_testIiiEvRT_RT0_ It seems that 'const' is missing. It seems similar to https://issues.dlang.org/show_bug.cgi?id=20336, only that here templates are involved.

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