Text <> Formula

[Benoît_Bouillon]

Hello friends,
I was wondering if it was possible to convert a characters string into a directly exploitable formula after or during compiling the program?

Example :

Chain = "y = a*x^2 + b*x + c"
a = 2
b = 3
c = 4
x = 1

// Formula : 
y = a*x^2 + b*x + c

// Result :
y = 9

Thanking you.

[Michel_Bujardet]

This can help:
https://documentation.xojo.com/api/code_execution/xojoscript.html

[Jean-Yves_Pochez]

or this :

Expression Evaluator Class

Occasionally, there is a need to have the user enter a mathematical expression and then have the application evaluate it. I’ve run into this situation a number of times in the past, and in those cases I’ve thrown together the minimum bit of programming that would do the job in the particular instance. For a current project I’ve decided to put a bit more effort into it, and have created an expression evaluator class that should handle any situation that I expect to encounter in the foreseeable fu…

[Jean-Yves_Pochez]

and also this :

Expression Evaluator Class

For reference, Xojo includes a simple expression evaluator sample project that uses XojoScript: Examples/Advanced/XojoScript/Evaluator

[Benoît_Bouillon]

Merci Michel et Jean-Yves,
I surely did not fully understand, it looks like these cases deal with an expression but can we deal with a function or a formula with associated variables?
Also it seems to work for versions after RB 2010, no?