05-14-2014
Get variables from expression
Hi,
I have a k-shell master script which reads variables that are globally set and this script is modified by users per their requirements and users define few other variables.
In the script few expressions are evaluated which include both global variables and those added by the user, I would like to parse the expressions to get the list of variables used in the expression and check if they are set or not set before evaluating the expression.
The expressions are similiar to SQL where clause and I would like to know if there is any handy utility that parses the expressions and returns only the variables eliminating all constants, relational operators, arithmetic operators and logical operators ?
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