Merged #144.
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As a side note, the module can still be improved with a series of fixup
optimizations which include pvar handling (token should include an un-evaluated
pv_spec_p struct) in order to avoid expression parsing at runtime. I should put
this on the TODO list :)
A couple of quick ideas related to
Thank you for your comments.
Reverse Polish notation is hideous.
YMMV. :) As an HP (RPN) user and someone who has written a Forth interpreter in
his formative years, I don't have issues moving between RPN and infix. I saw a
RPN evaluator, I needed to add a function to it, it was faster to
This changeset modifies the `mathops` module by adding a `math_rpn` function
which provides access (in an easily extensible way) to many more operations
than the default `math_eval` parser, especially functions (the need for `exp`
was the reason I wrote this). The `math_rpn` parser produces its
