I was considering the possibility that references within macros could
be optimized. Given the following:
#macro(foo $a $b)
$a $b
#end
#foo($c $d.e)
Currently both $a $b within the macro are referenced by AST. However,
with some compile time analysis it can be determined that $a and $b
can be referenced directly from the macro context (just like variables
outside of a macro). The analysis can determine that $c and $d are
not modified during the macro call by walking the AST tree and
insuring these references do not exist within the macro. Not only
could the AST be removed, but the value $d.e could be passed in to $b
which would avoid looking up the 'e' property on $d every time $b is
referenced. This would also save memory since the AST nodes for all
the references in the macro could be removed. Anyone see a problem
with this?
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