View Compilation Error

0_0_37983407_30729.cpp: In function 'bool spfa()':
0_0_37983407_30729.cpp:25:12: error: expected unqualified-id before '[' token
   for(auto [v, ww] : g[u]){
            ^
0_0_37983407_30729.cpp:25:12: error: expected ';' before '[' token
0_0_37983407_30729.cpp:25:13: error: 'v' was not declared in this scope
   for(auto [v, ww] : g[u]){
             ^
0_0_37983407_30729.cpp:25:16: error: 'ww' was not declared in this scope
   for(auto [v, ww] : g[u]){
                ^
0_0_37983407_30729.cpp: In lambda function:
0_0_37983407_30729.cpp:25:20: error: expected '{' before ':' token
   for(auto [v, ww] : g[u]){
                    ^
0_0_37983407_30729.cpp: In function 'bool spfa()':
0_0_37983407_30729.cpp:25:20: error: expected ';' before ':' token
0_0_37983407_30729.cpp:25:20: error: expected primary-expression before ':' token
0_0_37983407_30729.cpp:25:20: error: expected ')' before ':' token
0_0_37983407_30729.cpp:25:20: error: expected primary-expression before ':' token