Re: [PATCH] Quoted String "%q" non-ascii escaping (w/ hex).

https://www.lua.org/manual/5.3/manual.html#pdf-string.format 

 

 where it says "The q option formats a string between
 double quotes,
 using escape sequences when necessary to ensure that
 it can safely be read back by the Lua interpreter." Note that it
 explicitly does not mention that the result could be safely read by
 a C compiler.

 

 Within string literals, Lua is already perfectly fine with UTF-8
 content. It may also be fine with other extended ASCII forms, or
 with some other Unicode translation formats, leaving most of those
 details up to the system outside of Lua. But don't use UTF-7. Just
 don't.
 [
 
 

 [
 
 
 

 You would be far better served by writing a Lua function that
 generates a proper C string literal and calling that instead of
 depending on string.format("%q") and additional processing. 

 

 Lua is designed to work well with C. It is also designed to be used
 by people who don't want to know anything about C or lower level
 programming issues.  While the choice of base-10 for \ddd escapes is
 occasionally a source of friction when switching back and forth
 between the languages, it is no worse that the choice of 1-based
 array indexing and numerous other details that differ. 

 
-- 
Ross Berteig Ross@CheshireEng.com
Cheshire Engineering Corp. http://www.CheshireEng.com/
+1 626 303 1602