Function operator+

tests/TestExtra.cpp:161–163

\r\n\
matrix m = matrix(4, 4);\r\n\
m[1][3] = 4;\r\n\
\r\n\
int operator+(float a, int n){ return int(a) + n; }\r\n\
\r\n\
int min(int a, b){ return a < b ? a : b; }\r\n\
int ref rsize = new int;\r\n\