Defined in 2 files as a prototype:
- external/bsd/llvm/dist/clang/test/CXX/temp/temp.fct.spec/temp.arg.explicit/p9-0x.cpp, line 27 (as a prototype)
- external/bsd/llvm/dist/clang/test/CXX/temp/temp.fct.spec/temp.deduct/temp.deduct.call/p1-0x.cpp, line 33 (as a prototype)