Alexandre,
Try JediMath. It has a unit named Symbolic which is written by Marco van der
Voort. The same unit is also on the FPC SVN available, I can't find it at
the moment, but it's there (with example). If you need specific help here,
just ask.
Darius
----- Original Message -----
From: "Alexandre Leclerc" <[EMAIL PROTECTED]>
To: "lazarus mailinglist" <[email protected]>
Sent: Friday, June 09, 2006 4:31 PM
Subject: [lazarus] Looking for an expression evaluator
Hi all,
I'm looking for an expression evaluator that is able of the following
(and works under fpc - I tried TExpressionParser from Egbert van Nes
but even if it compiles, it doesn't works... unless this is me not
using it properly):
//this is a pseudo example of the functionnality I'm looking for:
ExpressionParser.AddVariable('Var1 := 2 + 2');
ExpressionParser.AddVariable('Var2 := (2 * 2) / 2');
ExpressionParser.AddVariable('Total := Var1 + Var2 + MyFunction(2,3,4)');
ExpressionParser.AddFunction('MyFunction', 3); //number of parameters
result := ExpressionParser.GetResult('Var2');
result := ExpressionParser.GetResult('Total');
ExpressionParser.OnFunction(const functName: string; var: array of
string; var result: string);
begin
result := '0';
if functName = 'MyFunction' then
result := '5'; //could process the variables...
end;
Regards.
--
Alexandre Leclerc
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