Language
C++
Compiler
gcc HEAD 12.0.0 20210511 (experimental)
Options
Warnings
Boost 1.73.0
C++2b
no pedantic
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=c++2b Exit Code:
1
Author
anonymous
over 4 years ago
C++
gcc HEAD 12.0.0 20210511 (experimental)
Author
anonymous
over 4 years ago
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/gcc-head/include -std=c++2b prog.cc:5:6: warning: C++20 concept definition syntax is 'concept <name> = <expr>'
5 | auto concept LessThanComparable<typename T> {
| ^~~~~~~
prog.cc:5:32: error: expected initializer before '<' token
5 | auto concept LessThanComparable<typename T> {
| ^