I implement, say, a Matrix class, then I should be able to tell
the
compiler that certain Matrix expressions, say A*B+A*C, can be
factored
into A*(B+C), and have the optimizer automatically do this for
me based
on what is defined in the type. Or specify that
write("a");writeln("b");
can be replaced by writeln("ab");. But I haven't come up with a
good
generic framework for actually making this implementable yet.
Yeah, it's not that easy; Nimrod uses a hygienic macro system
with term rewriting rules and side effect analysis and alias
analysis for that ;-).
http://build.nimrod-code.org/docs/trmacros.html
http://forum.nimrod-code.org/t/70
