Author
anonymous
about 19 hours ago
Language
C++
Compiler
gcc HEAD 16.0.0 20250704 (experimental)
Options
Warnings
Don't Use Boost
C++2b(GNU)
no pedantic
Raw compiler options
-DDECLARATION=117
Author
anonymous
about 19 hours ago
$ g++ prog.cc -Wall -Wextra -std=gnu++2b -DDECLARATION=117prog.cc:18:65: error: 'std::ostream& operator<<(std::ostream&, std::u8string_view)' conflicts with a previous declaration
18 | std::ostream& operator<<(std::ostream& os, std::u8string_view sv)
| ^
prog.cc:6:15: note: previous declaration 'std::ostream& debug::operator<<(std::ostream&, std::u8string_view)'
6 | std::ostream& operator<<(std::ostream& os, std::u8string_view sv)
| ^~~~~~~~
prog.cc: In function 'int main()':
prog.cc:29:13: error: ambiguous overload for 'operator<<' (operand types are 'std::ostream' {aka 'std::basic_ostream<char>'} and 'std::u8string_view' {aka 'std::basic_string_view<char8_t>'})
29 | std::cout << sv << std::endl;
| ~~~~~~~~~ ^~ ~~
| | |
| | std::u8string_view {aka std::basic_string_view<char8_t>}
| std::ostream {aka std::basic_ostream<char>}
prog.cc:29:13: note: there are 54 candidates
29 | std::cout << sv << std::endl;
| ~~~~~~~~~~^~~~~
prog.cc:6:15: note: candidate 1: 'std::ostream& debug::operator<<(std::ostream&, std::u8string_view)'
6 | std::ostream& operator<<(std::ostream& os, std::u8string_view sv)
| ^~~~~~~~
prog.cc:18:15: note: candidate 2: 'std::ostream& operator<<(std::ostream&, std::u8string_view)'
18 | std::ostream& operator<<(std::ostream& os, std::u8string_view sv)
| ^~~~~~~~
Exit Code:
1