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introduce proper parsing of math expressions in config files #29

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doudou opened this issue Nov 13, 2014 · 1 comment
Open

introduce proper parsing of math expressions in config files #29

doudou opened this issue Nov 13, 2014 · 1 comment

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@doudou
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@doudou doudou commented Nov 13, 2014

We should aim at allowing math expressions in config files without resorting to eval(). eval() is horribly dangerous and yukky.

The general scheme would IMO be:

  • if the target type is numeric and
  • the YAML-parsed type is a string
  • then parse the string

Convenience unit operators (5.deg, 22.mm, 1.bar) should be added to the parser.

Ready-to-use math expression parsers are already available as gems. Or, I always wanted to try treetop/parslet to see what they could do.

@jakobs
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@jakobs jakobs commented Jan 15, 2015

sounds good. especially for using things like Math::PI * 0.5, a.s.o.

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