to have an SEXP_ prefix. Now all values from the headers
are prefixed with either sexp_ or SEXP_, important for ease
of embedding. "make USE_BOEHM=1" still works as an alias
for "make SEXP_USE_BOEHM=1".
Sorry if this patch breaks your code, it had to be done
sooner or later.
This expands an expression and gives you an sexp representation
of the resulting ast, renaming symbols when there are conflicts.
It doesn't guarantee the minimum number of renames (neither in
terms of renamed bindings nor renamed instances) but tries to be
minimal and does guarantee no renames if there are no conflicts.
This is just for debugging purposes - chibi itself directly
uses the AST without renaming or doing anything like this.
