View Compilation Error

0_0_31723155_31889.cpp: In member function 'void MaxClique<MAXN>::BronKerbosch(MaxClique<MAXN>::bits, MaxClique<MAXN>::bits, MaxClique<MAXN>::bits)':
0_0_31723155_31889.cpp:41:4: error: 'cur' was not declared in this scope
    cur = P & ( ~G[ ( P | X )._Find_first() ] );
    ^