Created
November 21, 2016 17:18
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common lisp 函数 error
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| 语法 | |
| error datum &rest arguments | |
| 参数和值 | |
| datum, arguments --- 错误提示, 通常是一个 simple-error 对象 | |
| 描述 | |
| error 当条件发生时,产生一个错误信号 | |
| 代码 | |
| * (setq a 'fred) | |
| FRED | |
| * (if (numberp a) (1+ a) (error "~S is not a number." A)) | |
| debugger invoked on a SIMPLE-ERROR: FRED is not a number. | |
| 接着进入了中断 |
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