Anyone knows what `cimg::exception_mode() = 0;` does?

Question

  const unsigned int omode = cimg::exception_mode();
  cimg::exception_mode() = 0;

Never see this kinda syntax before.

Answer 1

exception mode might be returning a reference, and it is being set to 0. For example:

unsigned int& exception_mode() { return mode; };

So, the second line would be equivalent to:

void set_exception_mode( uint v ) { mode = v; };

BTW, it is really ugly! I would avoid this kinda syntax as much as I could.