Re: Emacs contributions, C and Lisp

[Eli Zaretskii]

> From: Óscar Fuentes <address@hidden>
> Date: Fri, 09 Jan 2015 01:23:10 +0100
> 
> Ok, I'll try again: let's suppose an extension that highlights chunks of
> code that might have side effects, or that could use multi-threading
> features, or that could result on calls to certain functions, or some
> other condition specified by the user. There is no doubt about the value
> of such extension, and it is technically possible. How could you do that
> without accessing the full AST?

Thanks for these examples.  I think it would help to explain how would
a program (such as a Lisp program) know whether some code has these
side effects, given the information in the AST.  IOW, what parts of
the AST information will be used for each one of those, and how?