View Compilation Error

0_0_38514217_7557.cpp: In function 'int main()':
0_0_38514217_7557.cpp:88:18: error: expected unqualified-id before '[' token
         for(auto [w, y] : leaf)
                  ^
0_0_38514217_7557.cpp:88:18: error: expected ';' before '[' token
0_0_38514217_7557.cpp:88:19: error: 'w' was not declared in this scope
         for(auto [w, y] : leaf)
                   ^
0_0_38514217_7557.cpp:88:22: error: 'y' was not declared in this scope
         for(auto [w, y] : leaf)
                      ^
0_0_38514217_7557.cpp: In lambda function:
0_0_38514217_7557.cpp:88:25: error: expected '{' before ':' token
         for(auto [w, y] : leaf)
                         ^
0_0_38514217_7557.cpp: In function 'int main()':
0_0_38514217_7557.cpp:88:25: error: expected ';' before ':' token
0_0_38514217_7557.cpp:88:25: error: expected primary-expression before ':' token
0_0_38514217_7557.cpp:88:25: error: expected ')' before ':' token
0_0_38514217_7557.cpp:88:25: error: expected primary-expression before ':' token