也许以下(未经测试！)代码可能是鼓舞人心的

Perhaps the following (untested!) code might be inspirational

#define report(Log) do { std::ostringstream _os; \
  _os << Log << std::flush; print(_os.str()); \
  throw std::runtime(_os.str()); } while(0)

，您可以将其用作 report("x ="<< x);

顺便说一句，您甚至可以使用

BTW, you might even pass the source location using

#define report_at(Log,Fil,Lin)  do { std::ostringstream _os; \
  _os << Fil << ":" << Lin << ": " << Log << std::flush; \
  print(_os.str()); \
  throw std::runtime(_os.str()); } while(0)

^{(要降低与 _os 发生碰撞的可能性，您甚至可以使用预处理器}

^{(to lower probability of collision with _os you might even replace all its occurrences inside the brace with _os##Lin using preprocessor concatenation)}

#define report_at_bis(Log,Fil,Lin) report_at(Log,Fil,Lin)

#define report(Log) report_at_bis(Log,__FILE__,__LINE__)

这显示了宏真正有用的情况之一.

and this shows one of the cases where a macro is really useful.