Lua specs say about
package.config(由我添加的编号)：
- The first line is the directory separator string. Default is ‘
/‘ for all other systems.
- The second line is the character that separates templates in a path. Default is ‘
;‘.
- The third line is the string that marks the substitution points in a template. Default is ‘
?‘.
- The fourth line is a string that,in a path in Windows,is replaced by the executable’s directory. Default is ‘
!‘.
- The fifth line is a mark to ignore all text before it when building the
luaopen_ function name. Default is ‘-‘.
我的解释：
>绝对清晰(Windows /其他系统的示例使其成为傻瓜证明)
>路径字符串中可以有多个路径.它们由此符号分隔(默认情况下为;).
>无论Lua在路径字符串中找到此字符(默认情况下为？),它都会将其替换为提供给require或package.searchpath函数的模块名称,并检查该文件是否存在.
到目前为止,这么好,但最后两行对我来说并不完全清楚.
>为什么它说“在Windows中的路径”？这是否意味着在其他平台上,这没有任何意义？如果是这样,为什么？
>我花了一段时间来理解这一点,但最终another part of the specs给了我一个提示：
The name of this C function is the string “luaopen_” concatenated with a copy of the module name where each dot is replaced by an underscore. Moreover,if the module name has a hyphen,its prefix up to (and including) the first hyphen is removed. For instance,if the module name is a.v1-b.c,the function name will be luaopen_b_c.
这个符号( – 默认情况下)也是如此,它可以同时提供不同版本的库 – 可能是对最新版本的无前缀符号链接,以便可以在两个路径上访问相同的库(即在两个模块名称下),但只有一个C符号名称？
