do ... while(0) 的使用
tk
posted @ 13 年前
in C
, 1538 阅读
今天稍微看了下 Ruby 的 array#pack 和 string#unpack 的实现，额，相当复杂（因为 lua 标准库里没有这样的函数实现，所以看 Ruby 的）。然后在其中发现了很多宏定义使用了
1 2 3 | #define MACRO(x) do {\statements; \} while(0) |
这样的形式，蓝后就去百度谷歌看了看，这里就贴链接，不重复解释了，反正是妙用。
do...while(0)的妙用 http://www.cnblogs.com/flying_bat/archive/2008/01/18/1044693.html
do { … } while (0) what is it good for? http://stackoverflow.com/questions/257418/do-while-0-what-is-it-good-for
3 年前
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