Wandbox

Ran/Viewed Log

Author

anonymous

over 5 years ago

Language

C++

Compiler

gcc HEAD 10.0.0 20190919 (experimental)

Options

Warnings

Boost 1.69.0

C++2a(GNU)

no pedantic

Author

anonymous

over 5 years ago

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

prog.cc: In function 'int main()':
prog.cc:73:19: error: cannot allocate an object of abstract type 'BaseIterator'
   73 |     for(auto&& i: a) {
      |                   ^
prog.cc:3:7: note:   because the following virtual functions are pure within 'BaseIterator':
    3 | class BaseIterator
      |       ^~~~~~~~~~~~
prog.cc:19:27: note:     'virtual BaseIterator& BaseIterator::operator++()'
   19 |     virtual BaseIterator& operator++() = 0;
      |                           ^~~~~~~~
prog.cc:73:19: error: cannot declare variable '__for_begin ' to be of abstract type 'BaseIterator'
   73 |     for(auto&& i: a) {
      |                   ^
prog.cc:73:19: error: cannot allocate an object of abstract type 'BaseIterator'
prog.cc:73:19: error: cannot declare variable '__for_end ' to be of abstract type 'BaseIterator'

Exit Code:

1