string.m4

来自「操作系统源代码」· M4 代码 · 共 9 行

define(string,`integer $1(len(substr($2,1)))
str($1,substr($2,1),0)
data $1(len(substr($2,1)))/EOS/
')

define(str,`ifelse($2,",,data $1(incr($3))/`LET'substr($2,0,1)/
`str($1,substr($2,1),incr($3))')')