"rex" should be "rex.pcre"

[zhaozg]

luvi/src/main.c

Line 100 in 4115796

lua_setfield(L, -2, "rex");

should we rename "rex" to "rex.pcre"? I think we compat to office version name.

If yes, I can make a PR.

[squeek502]

I think the canonical name would be "rex_pcre":

• https://github.com/rrthomas/lrexlib/blob/69d5c442c5a4bdc1271103e88c5c798b605e9ed2/test/runtest.lua#L63
• https://github.com/rrthomas/lrexlib/blob/69d5c442c5a4bdc1271103e88c5c798b605e9ed2/src/pcre/lpcre.c#L23

But this would be a breaking change, so I don't think it's worth it. If you want to also set preload["rex_pcre"] to the same value as preload["rex"] that might be ok.