Wandbox

Ran/Viewed Log

Author

anonymous

over 6 years ago

Language

C++

Compiler

gcc HEAD 9.0.1 20190313 (experimental)

Options

Warnings

Boost 1.69.0

C++2a(GNU)

no pedantic

Author

anonymous

over 6 years ago

$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.69.0/gcc-head/include -std=gnu++2a

prog.cc:14:19: error: call to non-'constexpr' function 'int g(int)'
   14 | auto f(T t) -> U<g(T()) + h(T())> {}
      |                  ~^~~~~
prog.cc: In function 'int main()':
prog.cc:19:7: warning: unused variable 'k' [-Wunused-variable]
   19 |   int k = f(0);
      |       ^
prog.cc: In instantiation of 'constexpr int h(T) [with T = int]':
prog.cc:14:28:   required by substitution of 'template<class T> U<(g(T()) + h(T()))> f(T) [with T = int]'
prog.cc:19:14:   required from here
prog.cc:11:32: error: 'error' is not a member of 'int'
   11 | constexpr int h(T) { return T::error; }
      |                                ^~~~~

Exit Code:

1