| // Testcase from P0170R1 |
| // { dg-do compile { target c++17 } } |
| |
| auto Fwd = [](int (*fp)(int), auto a) { return fp(a); }; |
| auto C = [](auto a) { return a; }; |
| static_assert( Fwd(C ,3) == 3); // OK |
| // No specialization of the function call operator template can be constexpr |
| // (because of the local static). |
| auto NC = [](auto a) { static int s; return a; }; // { dg-error "static" } |
| // { dg-message "operator int" "" { target *-*-* } .+1 } |
| static_assert( Fwd(NC ,3) == 3); // { dg-error "" } |
| |
| // We look for the string "operator int" to check that we aren't trying to do |
| // template pretty-printing in an expression; that gets incredibly unwieldy |
| // with the decltype magic we do for lambdas. |
