Re: Patch: Syntax and Hard Newlines

[Stefan Monnier]

>> or change byte-opt.el to mark the `propertize' function with
>> `byte-optimize-pure-func' rather than with `side-effect-free'.
> But then byte-compilation would change the semantics of `propertize'.

Slightly, yes.

>     -- Function: propertize string &rest properties
>         This function returns a copy of STRING [...]

Yes, with byte-optimize-pure-func the result would still be a different
string than the argument, but the result would just always be the same
string rather than creating a new one each time.  As you've noticed this is
already done for `concat' (and this has been the case for a long time
already).  Elisp strings are almost never modified, so it's not
a big problem.


        Stefan