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$ prog.cc: In constructor 'Foo::Foo(std::size_t, char)':
prog.cc:7:16: warning: unused parameter 'i' [-Wunused-parameter]
Foo(size_t i, char c) {}
^
prog.cc:7:24: warning: unused parameter 'c' [-Wunused-parameter]
Foo(size_t i, char c) {}
^
prog.cc: In function 'std::vector<char> Bar2()':
prog.cc:21:19: warning: narrowing conversion of 'i' from 'std::size_t {aka long unsigned int}' to 'char' inside { } [-Wnarrowing]
return { i, c }; // bad
^
prog.cc:21:19: warning: narrowing conversion of 'i' from 'std::size_t {aka long unsigned int}' to 'char' inside { } [-Wnarrowing]
/opt/wandbox/boost-1.65.1/gcc-6.2.0/lib/libboost_unit_test_framework.a(unit_test_main.o): In function `main':
unit_test_main.cpp:(.text.startup+0x6): undefined reference to `init_unit_test_suite(int, char**)'
collect2: error: ld returned 1 exit status
Exit Code:
1