View Compilation Error

0_0_33371599_18019.cpp: In function 'void tree::clear(int)':
0_0_33371599_18019.cpp:93:16: error: 'M' was not declared in this scope
         M(first),M(second),M(f),M(dep),dfx=0;
                ^
0_0_33371599_18019.cpp: In function 'int main()':
0_0_33371599_18019.cpp:157:15: error: 'M' was not declared in this scope
         M(root),M(with);
               ^