Can anyone recommend a good expression parser/evaluator? Ideally a bit
more than just mathematical expressions, we would like it to handle
logical evaluation (ie Booleans), IF statements and ideally strings
(primarily for comparison within boolean IF conditions but if the
parser/evaluator could handle strings as results then all the better).
We don’t need any loop constructs or more advanced program control
constructs. We would probably like to be able to define our own
expression functions but the user probably doesn’t need to be able to.
me too. I use a thing called FormulaBuilder that got for D2, before
variants, and appears to have vanished without trace. It does one-time
compiles, can add my own functions, rerun the function
changing only the variables and does
IIF(expression,ontrue,onfalse).CHOOSE, SELECT, string functions, date
functions, statistics etc. Doesnt do multiline expressions like
pasScript. For my kind of application, it has been perfect. It is also
seriously dated and I have been too lazy to modernize the code. A good
replacement would be nice.
--
Phil Scadden, Senior Scientist GNS Science Ltd 764 Cumberland St,
Private Bag 1930, Dunedin, New Zealand Ph +64 3 4799663, fax +64 3 477 5232
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