Language
C++
Compiler
gcc 11.1.0
Options
Warnings
Boost 1.79.0
C++2b(GNU)
no pedantic
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.79.0-gcc-11.1.0/include -std=gnu++2b Exit Code:
1
Author
anonymous
about 3 years ago
C++
gcc 11.1.0
Author
anonymous
about 3 years ago
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.79.0-gcc-11.1.0/include -std=gnu++2b prog.cc: In function 'constexpr int f()':
prog.cc:1:52: error: the value of 't' is not usable in a constant expression
1 | constexpr int f() { int t = 10; constexpr int t2 = t; return t2; };
| ^
prog.cc:1:25: note: 'int t' is not const
1 | constexpr int f() { int t = 10; constexpr int t2 = t; return t2; };
| ^
prog.cc: In function 'int main()':
prog.cc:5:19: warning: unused variable 'z' [-Wunused-variable]
5 | constexpr int z = f();
| ^